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.
28 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
29 compatible one, to avoid the (poorly documented) possibility of a config
30 file in the working directory redirecting the DB files, possibly correpting
36 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
37 than -2003 did; needs libidn2 in addition to libidn.
39 JH/02 The path option on a pipe transport is now expanded before use.
41 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
42 Patch provided by "Björn", documentation fix added too.
44 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
45 missing a wire-to-host endian conversion.
47 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
48 close after a BDAT command line could be taken as a following command,
49 giving a synch failure. Fix by only checking for synch immediately
50 before acknowledging the chunk.
52 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
53 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
54 macro. Patches provided by Josh Soref.
56 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
57 Previously we did not; the RFC seems ambiguous and VRFY is not listed
58 by IANA as a service extension. However, John Klensin suggests that we
61 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
62 the dkim code may be unix-mode line endings rather than smtp wire-format
63 CRLF, so prepend a CR to any bare LF.
65 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
66 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
68 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
69 the first were themselves being wrongly included in the feed into dkim
70 processing; with most chunk sizes in use this resulted in an incorrect
71 body hash calculated value.
73 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
74 DKIM signature block, for verification. Although advised against by
75 standards it is specifically not ruled illegal.
77 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
79 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
80 missing a body hash (the bh= tag).
82 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
83 It seems that HAProxy sends the Proxy Protocol information in clear and
84 only then does a TLS startup, so do the same.
86 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
87 TCP connections (such as for Spamd) unless the daemon successfully set
88 Fast Open mode on its listening sockets. This fixes breakage seen on
89 too-old kernels or those not configured for Fast Open, at the cost of
90 requiring both directions being enabled for TFO, and TFO never being used
91 by non-daemon-related Exim processes.
93 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
94 endings, at least on the first header line. Try to canonify any that get
95 past that check, despite the cost.
97 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
98 now limited to an arbitrary five deep, while parsing addresses with the
99 strip_excess_angle_brackets option enabled.
101 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
102 instead leave the unprompted TLS handshake in socket buffer for the
103 TLS library to consume.
105 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
107 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
109 JH/16 Drop variables when they go out of scope. Memory management drops a whole
110 region in one operation, for speed, and this leaves assigned pointers
111 dangling. Add checks run only under the testsuite which checks all
112 variables at a store-reset and panics on a dangling pointer; add code
113 explicitly nulling out all the variables discovered. Fixes one known
114 bug: a transport crash, where a dangling pointer for $sending_ip_address
115 originally assigned in a verify callout, is re-used.
117 PP/06 Drop '.' from @INC in various Perl scripts.
119 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
121 PP/08 Reduce a number of compilation warnings under clang; building with
122 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
123 should be warning-free.
125 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
127 HS/01 Fix portability problems introduced by PP/08 for platforms where
128 realloc(NULL) is not equivalent to malloc() [SunOS et al].
130 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
131 chunk. This allows us to accept broken chunked messages. We need a more
132 general solution here.
134 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
135 already-broken messages in the queue.
137 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
139 JH/19 Fix reference counting bug in routing-generated-address tracking.
145 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
146 supports it and a size is available (ie. the sending peer gave us one).
148 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
149 years of being deprecated). The replacements are the ACLs
150 acl_smtp_mime and acl_not_smtp_mime.
152 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
153 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
154 or even an in-clear connection were permitted. Now, if the host lookup
155 was dnssec and dane was requested then the host is only used if the
156 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
157 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
158 if one fails this test.
159 This means that a poorly-configured remote DNS will make it incommunicado;
160 but it protects against a DNS-interception attack on it.
162 JH/04 Bug 1810: make continued-use of an open smtp transport connection
163 non-noisy when a race steals the message being considered.
165 JH/05 If main configuration option tls_certificate is unset, generate a
166 self-signed certificate for inbound TLS connections.
168 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
169 in rewrites and routers.
171 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
172 and logged a warning sing 4.83; now they are a configuration file error.
174 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
175 (lacking @domain). Apply the same qualification processing as RCPT.
177 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
179 JH/10 Support ${sha256:} applied to a string (as well as the previous
182 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
183 a cutthrough deliver is pending, as we always want to make a connection.
184 This also avoids re-routing the message when later placing the cutthrough
185 connection after a verify cache hit.
186 Do not update it with the verify result either.
188 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
189 when routing results in more than one destination address.
191 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
192 signing (which inhibits the cutthrough capability). Previously only
193 the presence of an option was tested; now an expansion evaluating as
194 empty is permissible (obviously it should depend only on data available
195 when the cutthrough connection is made).
197 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
198 the relevant preceding SMTP command did not note the pipelining mode.
200 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
201 Previously they were not counted.
203 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
204 as one having no matching records. Previously we deferred the message
205 that needed the lookup.
207 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
208 distinguished as "(=".
210 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
211 for missing MX records. Previously it only worked for missing A records.
213 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
215 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
216 after the data-go-ahead and data-ack. Patch from Jason Betts.
218 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
219 even for a "none" policy. Patch from Tony Meyer.
221 JH/22 Fix continued use of a connection for further deliveries. If a port was
222 specified by a router, it must also match for the delivery to be
225 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
226 When one of the recipients of a message was unsuitable for the connection
227 (has no matching addresses), we lost track of needing to mark it
228 deferred. As a result mail would be lost.
230 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
232 JH/25 Decoding ACL controls is now done using a binary search; the source code
233 takes up less space and should be simpler to maintain. Merge the ACL
234 condition decode tables also, with similar effect.
236 JH/26 Fix problem with one_time used on a redirect router which returned the
237 parent address unchanged. A retry would see the parent address marked as
238 delivered, so not attempt the (identical) child. As a result mail would
241 JH/27 Fix a possible security hole, wherein a process operating with the Exim
242 UID can gain a root shell. Credit to http://www.halfdog.net/ for
243 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
246 JH/28 Enable {spool,log} filesystem space and inode checks as default.
247 Main config options check_{log,spool}_{inodes,space} are now
248 100 inodes, 10MB unless set otherwise in the configuration.
250 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
251 Previously it only applied to the main-section connection policy
254 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
256 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
257 by me. Added RFC7919 DH primes as an alternative.
259 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
260 are not in the system include path.
262 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
263 GnuTLS, when a session startup failed (eg because the client disconnected)
264 Exim did stdio operations after fclose. This was exposed by a recent
265 change which nulled out the file handle after the fclose.
267 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
268 signed directly by the cert-signing cert, rather than an intermediate
269 OCSP-signing cert. This is the model used by LetsEncrypt.
271 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
273 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
274 an incoming connection.
276 HS/02 Bug 1802: Do not half-close the connection after sending a request
279 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
280 fallback to "prime256v1".
282 JH/34 SECURITY: Use proper copy of DATA command in error message.
283 Could leak key material. Remotely exploitable. CVE-2016-9963.
289 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
290 and 3.4.4 - once the server is enabled to respond to an OCSP request
291 it does even when not requested, resulting in a stapling non-aware
292 client dropping the TLS connection.
294 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
295 support variable-length bit vectors. No functional change.
297 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
298 The I= interface field on outgoing lines is now after the H= remote
299 host field, same as incoming lines. There is a separate
300 outgoing_interface log selector which allows you to disable the
303 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
304 If not running log_selector +smtp_connection the mainlog would be held
305 open indefinitely after a "too many connections" event, including to a
306 deleted file after a log rotate. Leave the per net connection logging
307 leaving it open for efficiency as that will be quickly detected by the
308 check on the next write.
310 HS/01 Bug 1671: Fix post transport crash.
311 Processing the wait-<transport> messages could crash the delivery
312 process if the message IDs didn't exist for some reason. When
313 using 'split_spool_directory=yes' the construction of the spool
314 file name failed already, exposing the same netto behaviour.
316 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
317 mime_regex ACL conditions.
319 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
320 to DSN fail messages (bounces): remote IP, remote greeting, remote response
321 to HELO, local diagnostic string.
323 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
324 log line to debug. Even when configured with a tls authenticator many
325 client connections are expected to not authenticate in this way, so
326 an authenticate fail is not an error.
328 HS/02 Add the Exim version string to the process info. This way exiwhat
329 gives some more detail about the running daemon.
331 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
332 matter for fast-change records such as DNSBLs.
334 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
335 retry record, even if constant. There may be multiple transports with
336 different interface settings and the retry behaviour needs to be kept
339 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
341 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
343 JH/10 Bug 840: fix log_defer_output option of pipe transport
345 JH/11 Bug 830: use same host for all RCPTS of a message, even under
346 hosts_randomize. This matters a lot when combined with mua_wrapper.
348 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
349 ${quote_pgsql:<string>} operator.
351 JH/13 Bug 1708: avoid misaligned access in cached lookup.
353 JH/14 Change header file name for freeradius-client. Relevant if compiling
354 with Radius support; from the Gentoo tree and checked under Fedora.
356 JH/15 Bug 1712: Introduce $prdr_requested flag variable
358 JH/16 Bug 1714: Permit an empty string as expansion result for transport
359 option transport_filter, meaning no filtering.
361 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
363 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
364 defaults to "*" (all hosts). The variable is now available when not built
365 with TLS, default unset, mainly to enable keeping the testsuite sane.
366 If a server certificate is not supplied (via tls_certificate) an error is
367 logged, and clients will find TLS connections fail on startup. Presumably
368 they will retry in-clear.
369 Packagers of Exim are strongly encouraged to create a server certificate
370 at installation time.
372 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
373 with the $config_file variable.
375 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
376 in transport context, after the attempt, and per-recipient. The latter type
377 is per host attempted. The event data is the error message, and the errno
378 information encodes the lookup type (A vs. MX) used for the (first) host,
379 and the trailing two digits of the smtp 4xx response.
381 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
382 to write to mainlog (or rejectlog, paniclog) in the window between file
383 creation and permissions/ownership being changed. Particularly affects
384 installations where exicyclog is run as root, rather than exim user;
385 result is that the running daemon panics and dies.
387 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
389 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
390 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
391 "pri" and "weight". Note that the previous implicit priority given by the
392 list order is no longer honoured.
394 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
397 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
398 by defining SUPPORT_SOCKS.
400 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
401 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
402 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
403 variables are renamed to proxy_{local,external}_{address,port}.
405 JH/27 Move Internationalisation support from Experimental to mainline, enabled
406 for a build by defining SUPPORT_I18N
408 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
409 of the query string, and make ${quote_redis:} do that quoting.
411 JH/29 Move Events support from Experimental to mainline, enabled by default
412 and removable for a build by defining DISABLE_EVENT.
414 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
416 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
417 cached by the daemon.
419 JH/32 Move Redis support from Experimental to mainline, enabled for a build
420 by defining LOOKUP_REDIS. The libhiredis library is required.
422 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
423 keys are given for lookup.
425 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
426 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
427 only supported when built with TLS support. The PolarSSL SHA routines
428 are still used when the TLS library is too old for convenient support.
430 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
431 openssl_options), for security. OpenSSL forces this from version 1.1.0
432 server-side so match that on older versions.
434 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
435 allocation for $value could be released as the expansion processing
436 concluded, but leaving the global pointer active for it.
438 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
439 and to use the domains and local_parts ACL conditions.
441 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
442 incorrectly not doubled on cutthrough transmission, hence seen as a
443 body-termination at the receiving system - resulting in truncated mails.
444 Commonly the sender saw a TCP-level error, and retransmitted the message
445 via the normal store-and-forward channel. This could result in duplicates
446 received - but deduplicating mailstores were liable to retain only the
447 initial truncated version.
449 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
451 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
453 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
454 we're in there, support oversigning also; bug 1309.
456 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
458 HS/04 Add support for keep_environment and add_environment options.
460 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
461 either intentional arithmetic overflow during PRNG, or testing config-
464 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
465 delivery resulted in actual delivery. Cancel cutthrough before DATA
468 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
469 rejects a recipient: pass the reject to the originator.
471 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
472 Many were false-positives and ignorable, but it's worth fixing the
475 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
476 for the new environment-manipulation done at startup. Move the routines
477 from being local to tls.c to being global via the os.c file.
479 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
480 an extract embedded as result-arg for a map, the first arg for extract
481 is unavailable so we cannot tell if this is a numbered or keyed
482 extraction. Accept either.
488 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
491 JH/02 The smtp transport option "multi_domain" is now expanded.
493 JH/03 The smtp transport now requests PRDR by default, if the server offers
496 JH/04 Certificate name checking on server certificates, when exim is a client,
497 is now done by default. The transport option tls_verify_cert_hostnames
498 can be used to disable this per-host. The build option
499 EXPERIMENTAL_CERTNAMES is withdrawn.
501 JH/05 The value of the tls_verify_certificates smtp transport and main options
502 default to the word "system" to access the system default CA bundle.
503 For GnuTLS, only version 3.0.20 or later.
505 JH/06 Verification of the server certificate for a TLS connection is now tried
506 (but not required) by default. The verification status is now logged by
507 default, for both outbound TLS and client-certificate supplying inbound
510 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
513 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
514 Status Notification (bounce) messages are now MIME format per RFC 3464.
515 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
516 under the control of the dsn_advertise_hosts option, and routers may
517 have a dsn_lasthop option.
519 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
520 default, modifiable by a malware= option. The list separator for
521 the options can now be changed in the usual way. Bug 68.
523 JH/10 The smtp_receive_timeout main option is now expanded before use.
525 JH/11 The incoming_interface log option now also enables logging of the
526 local interface on delivery outgoing connections.
528 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
529 if the interface and destination host and port all match.
531 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
534 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
535 Patch from Andrew Lewis.
537 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
538 now supports optional time-restrictions, weighting, and priority
539 modifiers per server. Patch originally by <rommer@active.by>.
541 JH/16 The spamd_address main option now supports a mixed list of local
542 and remote servers. Remote servers can be IPv6 addresses, and
543 specify a port-range.
545 JH/17 Bug 68: The spamd_address main option now supports an optional
546 timeout value per server.
548 JH/18 Bug 1581: Router and transport options headers_add/remove can
549 now have the list separator specified.
551 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
554 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
557 JH/21 Support for the A6 type of dns record is withdrawn.
559 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
560 rather than the verbs used.
562 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
563 from 255 to 1024 chars.
565 JH/24 Verification callouts now attempt to use TLS by default.
567 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
568 are generic router options now. The defaults didn't change.
570 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
571 Original patch from Alexander Shikoff, worked over by JH.
573 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
574 files if ZCAT_COMMAND is not executable.
576 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
578 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
580 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
581 Normally benign, it bites when the pair was led to by a CNAME;
582 modern usage is to not canonicalize the domain to a CNAME target
583 (and we were inconsistent anyway for A-only vs AAAA+A).
585 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
587 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
588 when evaluating $sender_host_dnssec.
590 JH/31 Check the HELO verification lookup for DNSSEC, adding new
591 $sender_helo_dnssec variable.
593 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
595 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
597 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
599 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
600 documented as working, but never had. Support all but $spam_report.
602 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
603 added for tls authenticator.
605 HS/03 Add perl_taintmode main config option
611 TL/01 When running the test suite, the README says that variables such as
612 no_msglog_check are global and can be placed anywhere in a specific
613 test's script, however it was observed that placement needed to be near
614 the beginning for it to behave that way. Changed the runtest perl
615 script to read through the entire script once to detect and set these
616 variables, reset to the beginning of the script, and then run through
617 the script parsing/test process like normal.
619 TL/02 The BSD's have an arc4random API. One of the functions to induce
620 adding randomness was arc4random_stir(), but it has been removed in
621 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
622 function when detected.
624 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
625 cause callback expansion.
627 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
628 syntax errors in an expansion can be treated as a string instead of
629 logging or causing an error, due to the internal use of bool_lax
630 instead of bool when processing it.
632 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
633 server certificates when making smtp deliveries.
635 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
637 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
639 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
641 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
642 Merged patch from Sebastian Wiedenroth.
644 JH/05 Fix results-pipe from transport process. Several recipients, combined
645 with certificate use, exposed issues where response data items split
646 over buffer boundaries were not parsed properly. This eventually
647 resulted in duplicates being sent. This issue only became common enough
648 to notice due to the introduction of connection certificate information,
649 the item size being so much larger. Found and fixed by Wolfgang Breyha.
651 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
652 size buffer was used, resulting in syntax errors when an expansion
655 JH/07 Add support for directories of certificates when compiled with a GnuTLS
656 version 3.3.6 or later.
658 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
659 is EXPERIMENTAL_EVENT, the main-configuration and transport options
660 both become "event_action", the variables become $event_name, $event_data
661 and $event_defer_errno. There is a new variable $verify_mode, usable in
662 routers, transports and related events. The tls:cert event is now also
663 raised for inbound connections, if the main configuration event_action
666 TL/06 In test suite, disable OCSP for old versions of openssl which contained
667 early OCSP support, but no stapling (appears to be less than 1.0.0).
669 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
670 server certificate names available under the smtp transport option
671 "tls_verify_cert_hostname" now do not permit multi-component wildcard
674 JH/10 Time-related extraction expansions from certificates now use the main
675 option "timezone" setting for output formatting, and are consistent
676 between OpenSSL and GnuTLS compilations. Bug 1541.
678 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
679 encoded parameter in the incoming message. Bug 1558.
681 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
682 include certificate info, eximon was claiming there were spoolfile
685 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
687 JH/14 Log delivery-related information more consistently, using the sequence
688 "H=<name> [<ip>]" wherever possible.
690 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
691 are problematic for Debian distribution, omit them from the release
694 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
696 JH/16 Fix string representation of time values on 64bit time_t architectures.
699 JH/17 Fix a null-indirection in certextract expansions when a nondefault
700 output list separator was used.
705 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
706 checkers that were complaining about end of non-void function with no
709 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
710 This was a regression introduced in 4.83 by another bugfix.
712 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
714 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
715 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
721 TF/01 Correctly close the server side of TLS when forking for delivery.
723 When a message was received over SMTP with TLS, Exim failed to clear up
724 the incoming connection properly after forking off the child process to
725 deliver the message. In some situations the subsequent outgoing
726 delivery connection happened to have the same fd number as the incoming
727 connection previously had. Exim would try to use TLS and fail, logging
728 a "Bad file descriptor" error.
730 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
731 utilities have not been installed.
733 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
734 temporary space as the ACL may create new global variables.
736 TL/01 LDAP support uses per connection or global context settings, depending
737 upon the detected version of the libraries at build time.
739 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
740 to extract and use the src ip:port in logging and expansions as if it
741 were a direct connection from the outside internet. PPv2 support was
742 updated based on HAProxy spec change in May 2014.
744 JH/02 Add ${listextract {number}{list}{success}{fail}}.
746 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
747 Properly escape header and check for NULL return.
749 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
752 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
754 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
755 characters in header names, implemented as a verify condition.
756 Contributed by Michael Fischer v. Mollard.
758 TL/05 Rename SPF condition results err_perm and err_temp to standardized
759 results permerror and temperror. Previous values are deprecated but
760 still accepted. In a future release, err_perm and err_temp will be
761 completely removed, which will be a backward incompatibility if the
762 ACL tests for either of these two old results. Patch contributed by
763 user bes-internal on the mailing list.
765 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
767 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
768 selectors, in both main and reject logs.
770 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
773 JH/07 Add malware type "sock" for talking to simple daemon.
775 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
777 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
778 routers/transports under cutthrough routing.
780 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
781 numbers. Touch up "bool" conditional to keep the same definition.
783 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
785 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
787 JH/12 Expand items in router/transport headers_add or headers_remove lists
788 individually rather than the list as a whole. Bug 1452.
790 Required for reasonable handling of multiple headers_ options when
791 they may be empty; requires that headers_remove items with embedded
792 colons must have them doubled (or the list-separator changed).
794 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
795 view the policy declared in the DMARC record. Currently, $dmarc_status
796 is a combined value of both the record presence and the result of the
799 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
801 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
802 dnslookup router and the smtp transport (applying to the forward
805 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
806 of ldap servers used for a specific lookup. Patch provided by Heiko
809 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
810 New variable $lookup_dnssec_authenticated for observability.
812 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
813 Patch submitted by Lars Timman.
815 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
817 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
818 Requires trusted mode and valid format message id, aborts otherwise.
819 Patch contributed by Heiko Schlichting.
821 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
822 certextract with support for various fields. Bug 1358.
824 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
825 is requested by default, modifiable by smtp transport option
828 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
829 operate on certificate variables to give certificate fingerprints
830 Also new ${sha256:cert_variable}.
832 JH/23 The PRDR feature is moved from being Experimental into the mainline.
834 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
835 Christian Aistleitner.
837 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
839 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
840 file. Patch from Wolfgang Breyha.
842 JH/25 Expand the coverage of the delivery $host and $host_address to
843 client authenticators run in verify callout. Bug 1476.
845 JH/26 Port service names are now accepted for tls_on_connect_ports, to
846 align with daemon_smtp_ports. Bug 72.
848 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
849 support and error reporting did not work properly.
851 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
852 and is readable. Patch from Andrew Colin Kissa.
854 TL/14 Enhance documentation of ${run expansion and how it parses the
855 commandline after expansion, particularly in the case when an
856 unquoted variable expansion results in an empty value.
858 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
860 PP/02 Fix internal collision of T_APL on systems which support RFC3123
861 by renaming away from it. Addresses GH issue 15, reported by
864 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
866 TL/15 SECURITY: prevent double expansion in math comparison functions
867 (can expand unsanitized data). Not remotely exploitable.
874 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
876 PP/02 Make -n do something, by making it not do something.
877 When combined with -bP, the name of an option is not output.
879 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
882 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
883 $sender_host_name and config options to manage this, and basic check
886 PP/05 DSCP support for outbound connections and control modifier for inbound.
888 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
889 (Only plugin which currently uses this is kerberos4, which nobody should
890 be using, but we should make it available and other future plugins might
891 conceivably use it, even though it would break NAT; stuff *should* be
892 using channel bindings instead).
894 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
895 name; added for Sendmail compatibility; requires admin caller.
896 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
897 just ignore it); requires trusted caller.
898 Also parse but ignore: -Ac -Am -X<logfile>
901 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
903 TL/02 Add +smtp_confirmation as a default logging option.
905 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
906 Patch by Magnus Holmgren from 2007-02-20.
908 TL/04 Bugzilla 1281 - Spec typo.
909 Bugzilla 1283 - Spec typo.
910 Bugzilla 1290 - Spec grammar fixes.
912 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
914 TL/06 Add Experimental DMARC support using libopendmarc libraries.
916 TL/07 Fix an out of order global option causing a segfault. Reported to dev
917 mailing list by by Dmitry Isaikin.
919 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
921 JH/02 Support "G" suffix to numbers in ${if comparisons.
923 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
925 NM/01 Bugzilla 1197 - Spec typo
926 Bugzilla 1196 - Spec examples corrections
928 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
930 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
931 gnutls_enable_pkcs11, but renamed to more accurately indicate its
934 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
935 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
937 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
938 "acl {{name}{arg}...}", and optional args on acl condition
941 JH/05 Permit multiple router/transport headers_add/remove lines.
943 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
945 JH/07 Avoid using a waiting database for a single-message-only transport.
946 Performance patch from Paul Fisher. Bugzilla 1262.
948 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
951 JH/09 Add $headers_added variable, with content from use of ACL modifier
952 add_header (but not yet added to the message). Bugzilla 199.
954 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
955 Pulled from Bugzilla 817 by Wolfgang Breyha.
957 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
959 (nb: this is the same fix as in Exim 4.80.1)
961 JH/11 Add A= logging on delivery lines, and a client_set_id option on
964 JH/12 Add optional authenticated_sender logging to A= and a log_selector
967 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
969 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
970 advertise SMTP AUTH mechanism to us, instead of a generic
971 protocol violation error. Also, make Exim more robust to bad
972 data from the Dovecot auth socket.
974 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
976 When a queue runner is handling a message, Exim first routes the
977 recipient addresses, during which it prunes them based on the retry
978 hints database. After that it attempts to deliver the message to
979 any remaining recipients. It then updates the hints database using
982 So if a recipient address works intermittently, it can get repeatedly
983 deferred at routing time. The retry hints record remains fresh so the
984 address never reaches the final cutoff time.
986 This is a fairly common occurrence when a user is bumping up against
987 their storage quota. Exim had some logic in its local delivery code
988 to deal with this. However it did not apply to per-recipient defers
989 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
991 This change adds a proper retry rule check during routing so that the
992 final cutoff time is checked against the message's age. We only do
993 this check if there is an address retry record and there is not a
994 domain retry record; this implies that previous attempts to handle
995 the address had the retry_use_local_parts option turned on. We use
996 this as an approximation for the destination being like a local
997 delivery, as in LMTP.
999 I suspect this new check makes the old local delivery cutoff check
1000 redundant, but I have not verified this so I left the code in place.
1002 TF/02 Correct gecos expansion when From: is a prefix of the username.
1004 Test 0254 submits a message to Exim with the header
1008 When I ran the test suite under the user fanf2, Exim expanded
1009 the header to contain my full name, whereas it should have added
1010 a Resent-Sender: header. It erroneously treats any prefix of the
1011 username as equal to the username.
1013 This change corrects that bug.
1015 GF/01 DCC debug and logging tidyup
1016 Error conditions log to paniclog rather than rejectlog.
1017 Debug lines prefixed by "DCC: " to remove any ambiguity.
1019 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1021 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1022 Bug spotted by Jeremy Harris; was flawed since initial commit.
1023 Would have resulted in OCSP responses post-SNI triggering an Exim
1024 NULL dereference and crash.
1026 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1028 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1029 Bug detection, analysis and fix by Samuel Thibault.
1030 Bugzilla 1331, Debian bug #698092.
1032 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1034 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1035 Server implementation by Todd Lyons, client by JH.
1036 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1037 config variable "prdr_enable" controls whether the server
1038 advertises the facility. If the client requests PRDR a new
1039 acl_data_smtp_prdr ACL is called once for each recipient, after
1040 the body content is received and before the acl_smtp_data ACL.
1041 The client is controlled by both of: a hosts_try_prdr option
1042 on the smtp transport, and the server advertisement.
1043 Default client logging of deliveries and rejections involving
1044 PRDR are flagged with the string "PRDR".
1046 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1047 fclose(). Diagnosis by Todd Lyons.
1049 PP/17 Update configure.default to handle IPv6 localhost better.
1050 Patch by Alain Williams (plus minor tweaks).
1053 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1054 This is now consistent with GnuTLS, and is now documented: the
1055 previous undocumented portable approach to treating the option as
1056 unset was to force an expansion failure. That still works, and
1057 an empty string is now equivalent.
1059 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1060 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1061 not performing validation itself.
1063 PP/20 Added force_command boolean option to pipe transport.
1064 Patch from Nick Koston, of cPanel Inc.
1066 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1069 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1071 PP/21 Fix eximon continuous updating with timestamped log-files.
1072 Broken in a format-string cleanup in 4.80, missed when I repaired the
1073 other false fix of the same issue.
1074 Report and fix from Heiko Schlichting.
1077 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1078 Report from Prashanth Katuri.
1080 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1081 It's SecureTransport, so affects any MacOS clients which use the
1082 system-integrated TLS libraries, including email clients.
1084 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1085 using a MIME ACL for non-SMTP local injection.
1086 Report and assistance in diagnosis by Warren Baker.
1088 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1090 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1092 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1093 last id that failed so it may be referenced in subsequent ACL's.
1095 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1098 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1099 ldap library initialization, allowing self-signed CA's to be
1100 used. Also properly sets require_cert option later in code by
1101 using NULL (global ldap config) instead of ldap handle (per
1102 session). Bug diagnosis and testing by alxgomz.
1104 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1105 the src/util/ subdirectory.
1107 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1108 renamed to Transport Post Delivery Action by Jeremy Harris, as
1111 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1112 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1113 redis_servers = needs to be configured which will be used by the redis
1114 lookup. Patch from Warren Baker, of The Packet Hub.
1116 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1118 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1119 hostname or reverse DNS when processing a host list. Used suggestions
1120 from multiple comments on this bug.
1122 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1124 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1125 Missed a few lines, added it to make the runtest require no keyboard
1128 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1129 contains upper case chars. Make router use caseful_local_part.
1131 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1132 support when GnuTLS has been built with p11-kit.
1138 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1140 This, or similar/improved, will also be change PP/11 of 4.82.
1146 PP/01 Handle short writes when writing local log-files.
1147 In practice, only affects FreeBSD (8 onwards).
1148 Bugzilla 1053, with thanks to Dmitry Isaikin.
1150 NM/01 Bugzilla 949 - Documentation tweak
1152 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1155 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1157 PP/02 Implemented gsasl authenticator.
1159 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1161 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1162 `pkg-config foo` for cflags/libs.
1164 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1165 with rest of GSASL and with heimdal_gssapi.
1167 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1168 `pkg-config foo` for cflags/libs for the TLS implementation.
1170 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1171 properties get this fed in as external SSF. A number of robustness
1172 and debugging improvements to the cyrus_sasl authenticator.
1174 PP/08 cyrus_sasl server now expands the server_realm option.
1176 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1177 Patch by Jeremy Harris.
1179 PP/10 Added dbmjz lookup type.
1181 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1183 PP/12 MAIL args handles TAB as well as SP, for better interop with
1184 non-compliant senders.
1185 Analysis and variant patch by Todd Lyons.
1187 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1188 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1189 Patch from Dirk Mueller <dmueller@suse.com>
1191 PP/13 tls_peerdn now print-escaped for spool files.
1192 Observed some $tls_peerdn in wild which contained \n, which resulted
1193 in spool file corruption.
1195 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1196 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1197 or write after TLS renegotiation, which otherwise led to messages
1200 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1201 as a tracking header (ie: a signed header comes before the signature).
1202 Patch from Wolfgang Breyha.
1204 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1205 comma-sep list; embedded commas doubled.
1207 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1209 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1211 Report and patch from Dmitry Banschikov.
1213 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1214 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1215 failures. We appear to now support TLS1.1+ with Exim.
1217 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1218 lets Exim select keys and certificates based upon TLS SNI from client.
1219 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1220 before an outbound SMTP session. New log_selector, +tls_sni.
1222 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1223 NULL dereference. Report and patch from Alun Jones.
1225 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1226 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1227 Not seeing resolver debug output on NetBSD, but suspect this is a
1228 resolver implementation change.
1230 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1231 Left warnings. Added "eximon gdb" invocation mode.
1233 PP/21 Defaulting "accept_8bitmime" to true, not false.
1235 PP/22 Added -bw for inetd wait mode support.
1237 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1238 locate the relevant includes and libraries. Made this the default.
1240 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1241 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1243 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1244 This may cause build issues on older platforms.
1246 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1247 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1248 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1249 Added SNI support via GnuTLS too.
1250 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1252 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1254 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1255 Applied second patch from Janne, implementing suggestion to default
1256 multiple-strings-in-record handling to match SPF spec.
1258 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1260 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1261 read-only, out of scope).
1262 Patch from Wolfgang Breyha, report from Stuart Northfield.
1264 PP/29 Fix three issues highlighted by clang analyser static analysis.
1265 Only crash-plausible issue would require the Cambridge-specific
1266 iplookup router and a misconfiguration.
1267 Report from Marcin Mirosław.
1269 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1271 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1272 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1273 As part of this, removing so much warning spew let me fix some minor
1274 real issues in debug logging.
1276 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1277 assignment on my part. Fixed.
1279 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1280 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1281 Janne Snabb (who went above and beyond: thank you).
1283 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1284 string otherwise requires a connection and a bunch more work and it's
1285 relatively easy to get wrong. Should also expose TLS library linkage
1288 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1289 64-bit ${eval} (JH/03).
1291 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1292 GNU libc to support some of the 64-bit stuff, should not lead to
1293 conflicts. Defined before os.h is pulled in, so if a given platform
1294 needs to override this, it can.
1296 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1297 protection layer was required, which is not implemented.
1298 Bugzilla 1254, patch from Wolfgang Breyha.
1300 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1301 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1302 tls_dhparam take prime identifiers. Also unbreak combination of
1303 OpenSSL+DH_params+TLSSNI.
1305 PP/39 Disable SSLv2 by default in OpenSSL support.
1311 PP/01 Solaris build fix for Oracle's LDAP libraries.
1312 Bugzilla 1109, patch from Stephen Usher.
1314 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1316 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1319 TF/02 Fix a couple more cases where we did not log the error message
1320 when unlink() failed. See also change 4.74-TF/03.
1322 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1323 lock up or crash if it happened to be inside a call to libc when it
1324 got a SIGUSR1 from exiwhat.
1326 The SIGUSR1 handler appends the current process status to the process
1327 log which is later printed by exiwhat. It used to use the general
1328 purpose logging code to do this, but several functions it calls are
1329 not safe for signals.
1331 The new output code in the SIGUSR1 handler is specific to the process
1332 log, and simple enough that it's easy to inspect for signal safety.
1333 Removing some special cases also simplifies the general logging code.
1334 Removing the spurious timestamps from the process log simplifies
1337 TF/04 Improved ratelimit ACL condition.
1339 The /noupdate option has been deprecated in favour of /readonly which
1340 has clearer semantics. The /leaky, /strict, and /readonly update modes
1341 are mutually exclusive. The update mode is no longer included in the
1342 database key; it just determines when the database is updated. (This
1343 means that when you upgrade Exim will forget old rate measurements.)
1345 Exim now checks that the per_* options are used with an update mode that
1346 makes sense for the current ACL. For example, when Exim is processing a
1347 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1348 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1349 must specify per_mail/readonly. If you omit the update mode it defaults to
1350 /leaky where that makes sense (as before) or /readonly where required.
1352 The /noupdate option is now undocumented but still supported for
1353 backwards compatibility. It is equivalent to /readonly except that in
1354 ACLs where /readonly is required you may specify /leaky/noupdate or
1355 /strict/noupdate which are treated the same as /readonly.
1357 A useful new feature is the /count= option. This is a generalization
1358 of the per_byte option, so that you can measure the throughput of other
1359 aggregate values. For example, the per_byte option is now equivalent
1360 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1362 The per_rcpt option has been generalized using the /count= mechanism
1363 (though it's more complicated than the per_byte equivalence). When it is
1364 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1365 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1366 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1367 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1368 Note that using per_rcpt with a non-readonly update mode in more than
1369 one ACL will cause the recipients to be double-counted. (The per_mail
1370 and per_byte options don't have this problem.)
1372 The handling of very low rates has changed slightly. If the computed rate
1373 is less than the event's count (usually one) then this event is the first
1374 after a long gap. In this case the rate is set to the same as this event's
1375 count, so that the first message of a spam run is counted properly.
1377 The major new feature is a mechanism for counting the rate of unique
1378 events. The new per_addr option counts the number of different
1379 recipients that someone has sent messages to in the last time period. It
1380 behaves like per_rcpt if all the recipient addresses are different, but
1381 duplicate recipient addresses do not increase the measured rate. Like
1382 the /count= option this is a general mechanism, so the per_addr option
1383 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1384 example, measure the rate that a client uses different sender addresses
1385 with the options per_mail/unique=$sender_address. There are further
1386 details in the main documentation.
1388 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1390 TF/06 Removed a few PCRE remnants.
1392 TF/07 Automatically extract Exim's version number from tags in the git
1393 repository when doing development or release builds.
1395 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1396 Bugzilla 879. Patch from Paul Fisher.
1398 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1399 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1402 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1404 PP/05 Variable $av_failed, true if the AV scanner deferred.
1405 Bugzilla 1078. Patch from John Horne.
1407 PP/06 Stop make process more reliably on build failure.
1408 Bugzilla 1087. Patch from Heiko Schlittermann.
1410 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1411 Bugzilla 1089. Patch from Heiko Schlittermann.
1413 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1414 Bugzilla 1131. Patch from Holger Weiß.
1416 PP/09 Handle IPv6 addresses with SPF.
1417 Bugzilla 860. Patch from Wolfgang Breyha.
1419 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1421 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1424 PP/11 match_* no longer expand right-hand-side by default.
1425 New compile-time build option, EXPAND_LISTMATCH_RHS.
1426 New expansion conditions, "inlist", "inlisti".
1428 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1430 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1432 PP/14 fix log_write() format string regression from TF/03.
1433 Bugzilla 1152. Patch from Dmitry Isaikin.
1439 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1441 PP/02 Harmonised TLS library version reporting; only show if debugging.
1442 Layout now matches that introduced for other libraries in 4.74 PP/03.
1444 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1446 PP/04 New "dns_use_edns0" global option.
1448 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1451 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1452 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1454 TK/01 Updated PolarSSL code to 0.14.2.
1455 Bugzilla 1097. Patch from Andreas Metzler.
1457 PP/07 Catch divide-by-zero in ${eval:...}.
1458 Fixes bugzilla 1102.
1460 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1463 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1464 format-string attack -- SECURITY: remote arbitrary code execution.
1466 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1467 time unintentionally subject to list matching rules, letting the header
1468 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1469 arbitrary string expansion). This allowed for information disclosure.
1471 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1472 INT_MIN/-1 -- value coerced to INT_MAX.
1478 NM/01 Workaround for PCRE version dependency in version reporting
1481 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1482 This fixes portability to compilers other than gcc, notably
1483 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1485 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1486 makefiles for portability to HP-UX and POSIX correctness.
1488 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1489 Also via indented variable definition in the Makefile.
1490 (Debugging by Oliver Heesakkers).
1492 PP/02 Restore caching of spamd results with expanded spamd_address.
1493 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1495 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1496 Improves build reliability. Fix from: Frank Elsner
1498 NM/02 Fix wide character breakage in the rfc2047 coding
1499 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1501 NM/03 Allow underscore in dnslist lookups
1502 Fixes bug 1026. Patch from Graeme Fowler
1504 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1505 Code patches from Adam Ciarcinski of NetBSD.
1507 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1510 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1511 is logged, to avoid truncation. Patch from John Horne.
1513 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1514 Patch from Jakob Hirsch.
1516 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1517 SQL string expansion failure details.
1518 Patch from Andrey Oktyabrski.
1520 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1521 Patch from Simon Arlott.
1523 PP/09 New lookups functionality failed to compile on old gcc which rejects
1524 extern declarations in function scope.
1525 Patch from Oliver Fleischmann
1527 PP/10 Use sig_atomic_t for flags set from signal handlers.
1528 Check getgroups() return and improve debugging.
1529 Fixed developed for diagnosis in bug 927 (which turned out to be
1532 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1533 Patch from Mark Zealey.
1535 PP/12 Bugzilla 1056: Improved spamd server selection.
1536 Patch from Mark Zealey.
1538 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1539 Based on patch from Heiko Schlittermann.
1541 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1542 Patch from Uwe Doering, sign-off by Michael Haardt.
1544 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1545 variable declaration deep within a block. Bug and patch from
1548 PP/15 lookups-Makefile IRIX compatibility coercion.
1550 PP/16 Make DISABLE_DKIM build knob functional.
1552 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1553 Patch by Simon Arlott
1555 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1556 variable argument macros. Our copy now differs from upstream.
1562 TF/01 Failure to get a lock on a hints database can have serious
1563 consequences so log it to the panic log.
1565 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1566 controlled using the smtp_confirmation log selector.
1568 TF/03 Include the error message when we fail to unlink a spool file.
1570 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1571 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1572 for maintaining out-of-tree patches for some time.
1574 PP/01 Bugzilla 139: Documentation and portability issues.
1575 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1576 Handle per-OS dynamic-module compilation flags.
1578 PP/02 Let /dev/null have normal permissions.
1579 The 4.73 fixes were a little too stringent and complained about the
1580 permissions on /dev/null. Exempt it from some checks.
1581 Reported by Andreas M. Kirchwitz.
1583 PP/03 Report version information for many libraries, including
1584 Exim version information for dynamically loaded libraries. Created
1585 version.h, now support a version extension string for distributors
1586 who patch heavily. Dynamic module ABI change.
1588 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1589 privilege escalation vulnerability whereby the Exim run-time user
1590 can cause root to append content of the attacker's choosing to
1593 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1596 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1597 If dropping privileges for untrusted macros, we disabled normal logging
1598 on the basis that it would fail; for the Exim run-time user, this is not
1599 the case, and it resulted in successful deliveries going unlogged.
1600 Fixed. Reported by Andreas Metzler.
1606 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1607 only prepend for the Resent-* case. Fixes regression introduced in
1608 Exim 4.70 by NM/22 for Bugzilla 607.
1610 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1611 increasing numbers of administrators be bitten by this.
1613 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1615 PP/03 Bugzilla 994: added openssl_options main configuration option.
1617 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1619 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1621 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1623 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1624 without a peer certificate, leading to a segfault because of an
1625 assumption that peers always have certificates. Be a little more
1626 paranoid. Problem reported by Martin Tscholak.
1628 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1629 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1630 NB: ClamAV planning to remove STREAM in "middle of 2010".
1631 CL also introduces -bmalware, various -d+acl logging additions and
1632 more caution in buffer sizes.
1634 PP/09 Implemented reverse_ip expansion operator.
1636 PP/10 Bugzilla 937: provide a "debug" ACL control.
1638 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1640 PP/12 Bugzilla 973: Implement --version.
1642 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1644 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1646 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1648 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1649 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1650 ignore trailing whitespace.
1652 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1654 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1657 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1658 Notification from Dr Andrew Aitchison.
1660 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1661 ExtendedDetectionInfo response format.
1662 Notification from John Horne.
1664 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1667 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1668 XSL and documented dependency on system catalogs, with examples of how
1671 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1674 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1675 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1676 configuration file which is writeable by the Exim user or group.
1678 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1679 of configuration files to cover files specified with the -C option if
1680 they are going to be used with root privileges, not just the default
1683 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1684 option (effectively making it always true).
1686 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1687 files to be used while preserving root privileges.
1689 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1690 that rogue child processes cannot use them.
1692 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1693 run-time user, instead of root.
1695 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1696 Exim run-time user without dropping privileges.
1698 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1699 result string, instead of calling string_vformat() twice with the same
1702 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1703 for other users. Others should always drop root privileges if they use
1704 -C on the command line, even for a whitelisted configure file.
1706 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1708 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1714 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1715 $data_path, and $header_path variables; fixed documentation bugs and
1718 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1719 exipick to access non-standard spools, including the "frozen" queue
1722 NM/01 Bugzilla 965: Support mysql stored procedures.
1723 Patch from Alain Williams
1725 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1727 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1728 Patch from Andreas Metzler
1730 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1731 Patch from Kirill Miazine
1733 NM/05 Bugzilla 671: Added umask to procmail example.
1735 JJ/03 installed exipick 20100323.0, fixing doc bug
1737 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1738 directory. Notification and patch from Dan Rosenberg.
1740 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1742 TK/02 Improve log output when DKIM signing operation fails.
1744 MH/01 Treat the transport option dkim_domain as a colon separated
1745 list, not as a single string, and sign the message with each element,
1746 omitting multiple occurences of the same signer.
1748 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1749 Bugzilla 985, 986. Patch by Simon Arlott
1751 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1752 Patch by Simon Arlott
1754 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1755 MBX locking. Notification from Dan Rosenberg.
1761 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1763 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1765 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1767 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1769 NM/04 Bugzilla 915: Flag broken perl installation during build.
1775 TK/01 Added patch by Johannes Berg that expands the main option
1776 "spamd_address" if it starts with a dollar sign.
1778 TK/02 Write list of recipients to X-Envelope-Sender header when building
1779 the mbox-format spool file for content scanning (suggested by Jakob
1782 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1783 (http://www.dcc-servers.net/) support via dccifd. Activated by
1784 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1786 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1787 by Mark Daniel Reidel <mr@df.eu>.
1789 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1790 When building exim an external PCRE library is now needed -
1791 PCRE is a system library on the majority of modern systems.
1792 See entry on PCRE_LIBS in EDITME file.
1794 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1795 conversation. Added nologin parameter to request.
1796 Patch contributed by Kirill Miazine.
1798 TF/01 Do not log submission mode rewrites if they do not change the address.
1800 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1802 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1803 log files in place. Contributed by Roberto Lima.
1805 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1807 TF/03 Bugzilla 615: When checking the local_parts router precondition
1808 after a local_part_suffix or local_part_prefix option, Exim now
1809 does not use the address's named list lookup cache, since this
1810 contains cached lookups for the whole local part.
1812 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1813 Robert Millan. Documentation is in experimental-spec.txt.
1815 TF/04 Bugzilla 668: Fix parallel build (make -j).
1817 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1819 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1820 Patch provided by Jan Srzednicki.
1822 TF/05 Leading white space used to be stripped from $spam_report which
1823 wrecked the formatting. Now it is preserved.
1825 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1826 that they are available at delivery time.
1828 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1830 TF/08 TLS error reporting now respects the incoming_interface and
1831 incoming_port log selectors.
1833 TF/09 Produce a more useful error message if an SMTP transport's hosts
1834 setting expands to an empty string.
1836 NM/06 Bugzilla 744: EXPN did not work under TLS.
1837 Patch provided by Phil Pennock.
1839 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1840 Patch provided by Richard Godbee.
1842 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1843 acl_smtp_notquit, added index entry.
1845 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1846 Patch provided by Eugene Bujak.
1848 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1849 accept(). Patch provided by Maxim Dounin.
1851 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1852 Patch provided by Phil Pennock.
1854 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1856 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1857 Patch provided by Brad "anomie" Jorsch.
1859 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1860 Patch provided by Dean Brooks.
1862 TK/05 Add native DKIM support (does not depend on external libraries).
1864 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1865 Patch provided by Graeme Fowler.
1867 NM/16 Bugzilla 851: Documentation example syntax fix.
1869 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1871 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1874 NM/19 Bugzilla 745: TLS version reporting.
1875 Patch provided by Phil Pennock.
1877 NM/20 Bugzilla 167: bool: condition support.
1878 Patch provided by Phil Pennock.
1880 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1881 clients. Patch provided by Phil Pennock.
1883 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1884 Patch provided by Brad "anomie" Jorsch.
1886 NM/23 Bugzilla 687: Fix misparses in eximstats.
1887 Patch provided by Heiko Schlittermann.
1889 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1890 Patch provided by Heiko Schlittermann.
1892 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1893 plus update to original patch.
1895 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1897 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1898 Patch provided by David Brownlee.
1900 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1902 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1904 NM/30 Bugzilla 888: TLS documentation bugfixes.
1906 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1908 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1909 Unlike the original bugzilla I have changed all shell scripts in src tree.
1911 NM/33 Bugzilla 898: Transport filter timeout fix.
1912 Patch by Todd Rinaldo.
1914 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1915 Patch by Serge Demonchaux.
1917 NM/35 Bugzilla 39: Base64 decode bug fixes.
1918 Patch by Jakob Hirsch.
1920 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1922 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1924 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1926 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1932 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1933 ALT-N's libdkim that I have put here:
1934 http://duncanthrax.net/exim-experimental/
1936 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1937 were called 'true' and it seems that C99 defines that as a reserved
1938 keyword to be used with 'bool' variable types. That means you could
1939 not include C99-style headers which use bools without triggering
1940 build errors in sieve.c.
1942 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1943 as mailq or other aliases. Changed the --help handling significantly
1944 to do whats expected. exim_usage() emits usage/help information.
1946 SC/01 Added the -bylocaldomain option to eximstats.
1948 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1950 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1952 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1958 PH/01 Another patch from the Sieve maintainer.
1960 PH/02 When an IPv6 address is converted to a string for single-key lookup
1961 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1962 dots are used instead of colons so that keys in lsearch files need not
1963 contain colons. This was done some time before quoting was made available
1964 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1965 (notated using the quote facility) so as to distinguish them from IPv4
1966 keys. This meant that lookups for IP addresses in host lists did not work
1967 for iplsearch lookups.
1969 This has been fixed by arranging for IPv6 addresses to be expressed with
1970 colons if the lookup type is iplsearch. This is not incompatible, because
1971 previously such lookups could never work.
1973 The situation is now rather anomalous, since one *can* have colons in
1974 ordinary lsearch keys. However, making the change in all cases is
1975 incompatible and would probably break a number of configurations.
1977 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1980 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1981 conversion specification without a maximum field width, thereby enabling
1982 a rogue spamd server to cause a buffer overflow. While nobody in their
1983 right mind would setup Exim to query an untrusted spamd server, an
1984 attacker that gains access to a server running spamd could potentially
1985 exploit this vulnerability to run arbitrary code as the Exim user.
1987 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1988 $primary_hostname instead of what libspf2 thinks the hosts name is.
1990 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1991 a directory entry by the name of the lookup key. Previously, if a
1992 symlink pointed to a non-existing file or a file in a directory that
1993 Exim lacked permissions to read, a lookup for a key matching that
1994 symlink would fail. Now it is enough that a matching directory entry
1995 exists, symlink or not. (Bugzilla 503.)
1997 PH/03 The body_linecount and body_zerocount variables are now exported in the
2000 PH/04 Added the $dnslist_matched variable.
2002 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2003 This means they are set thereafter only if the connection becomes
2006 PH/06 Added the client_condition to authenticators so that some can be skipped
2007 by clients under certain conditions.
2009 PH/07 The error message for a badly-placed control=no_multiline_responses left
2010 "_responses" off the end of the name.
2012 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2014 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2015 (without spaces) instead of just copying the configuration text.
2017 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2019 PH/11 Added $max_received_linelength.
2021 PH/12 Added +ignore_defer and +include_defer to host lists.
2023 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2024 way in which PCRE > 7.0 is built.
2026 PH/14 Implemented queue_only_load_latch.
2028 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2029 MAIL command. The effect was to mangle the value on 64-bit systems.
2031 PH/16 Another patch from the Sieve maintainer.
2033 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2035 PH/18 If a system quota error occurred while trying to create the file for
2036 a maildir delivery, the message "Mailbox is full" was not appended to the
2037 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2038 only to a quota excession during the actual writing of the file.
2040 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2041 characters?) which causes problems in log lines. The DN values are now
2042 passed through string_printing() before being added to log lines.
2044 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2045 and InterBase are left for another time.)
2047 PH/21 Added message_body_newlines option.
2049 PH/22 Guard against possible overflow in moan_check_errorcopy().
2051 PH/23 POSIX allows open() to be a macro; guard against that.
2053 PH/24 If the recipient of an error message contained an @ in the local part
2054 (suitably quoted, of course), incorrect values were put in $domain and
2055 $local_part during the evaluation of errors_copy.
2061 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2062 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2065 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2066 issue a MAIL command.
2068 PH/02 In an ACL statement such as
2070 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2072 if a client was not listed at all, or was listed with a value other than
2073 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2074 the condition was not true (as it should be), so access was not denied.
2075 The bug was that the ! inversion was incorrectly passed on to the second
2076 item. This has been fixed.
2078 PH/03 Added additional dnslists conditions == and =& which are different from
2079 = and & when the dns lookup returns more than one IP address.
2081 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2082 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2084 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2085 FSYNC, which compiles an option called disable_fsync that allows for
2086 bypassing fsync(). The documentation is heavily laced with warnings.
2088 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2090 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2091 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2092 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2093 including adding "make clean"; (3) Added -fPIC when compiling the test
2094 dynamically loaded module, to get rid of a warning.
2096 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2097 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2098 = 0s. The bug is otherwise harmless.
2100 PH/07 There was a bug in the dovecot authenticator such that the value of
2101 $auth1 could be overwritten, and so not correctly preserved, after a
2102 successful authentication. This usually meant that the value preserved by
2103 the server_setid option was incorrect.
2105 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2107 PH/09 Installed PCRE release 7.0.
2109 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2110 run for batched SMTP input. It is now run at the start of every message
2111 in the batch. While fixing this I discovered that the process information
2112 (output by running exiwhat) was not always getting set for -bs and -bS
2113 input. This is fixed, and it now also says "batched" for BSMTP.
2115 PH/11 Added control=no_pipelining.
2117 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2118 patch, slightly modified), and move the expansion of helo_data till after
2119 the connection is made in the smtp transport (so it can use these
2122 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2124 PH/14 Added log_selector = +pid.
2126 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2128 PH/16 Add ${if forany and ${if forall.
2130 PH/17 Added dsn_from option to vary the From: line in DSNs.
2132 PH/18 Flush SMTP output before performing a callout, unless control =
2133 no_callout_flush is set.
2135 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2136 was true (the default) a successful delivery failed to delete the retry
2137 item, thus causing premature timeout of the address. The bug is now
2140 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2142 PH/21 Long custom messages for fakedefer and fakereject are now split up
2143 into multiline responses in the same way that messages for "deny" and
2144 other ACL rejections are.
2146 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2147 with slight modification.
2149 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2150 draft, changing the syntax and factoring some duplicate code".
2152 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2153 for deliveries of the second and subsequent messages over the same SMTP
2156 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2157 ${reduce, with only minor "tidies".
2159 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2161 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2162 expansion side effects.
2164 PH/27 When a message times out after an over-quota error from an Exim-imposed
2165 quota, the bounce message says "mailbox is full". This message was not
2166 being given when it was a system quota that was exceeded. It now should
2169 MH/03 Made $recipients available in local_scan(). local_scan() already has
2170 better access to the recipient list through recipients_list[], but
2171 $recipients can be useful in postmaster-provided expansion strings.
2173 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2174 in the case of a MAIL command with additional options following the
2175 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2176 were accidentally chopped off.
2178 PH/29 SMTP synchronization checks are implemented when a command is read -
2179 there is a check that no more input is waiting when there shouldn't be
2180 any. However, for some commands, a delay in an ACL can mean that it is
2181 some time before the response is written. In this time, more input might
2182 arrive, invalidly. So now there are extra checks after an ACL has run for
2183 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2184 pipelining has not been advertised.
2186 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2188 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2189 returned in the SMTP response when smtp_return_error_details was false.
2190 This has been fixed.
2192 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2193 instead of the C I/O that was originally supplied, because problems were
2194 reported on Solaris.
2196 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2197 Exim which did not show up earlier: it was assuming that a call to
2198 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2199 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2200 was a macro that became an assignment, so it seemed to work. This has
2201 changed to a proper function call with a void return, hence the compile
2202 error. Exim's code has been fixed.
2204 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2207 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2209 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2211 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2212 because it turns out to be too big or there is a timeout) there is no
2213 "Completed" line in the log. When some messages of this type were
2214 selected by exigrep, they were listed as "not completed". Others were
2215 picked up by some special patterns. I have improved the selection
2216 criteria to be more general.
2218 PH/38 The host_find_failed option in the manualroute router can now be set
2219 to "ignore", to completely ignore a host whose IP address cannot be
2220 found. If all hosts are ignored, the behaviour is controlled by the new
2221 host_all_ignored option.
2223 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2224 homing or because of multiple MX records with /mx) generated more than
2225 one IP address, and the following item turned out to be the local host,
2226 all the secondary addresses of the first item were incorrectly removed
2227 from the list, along with the local host and any following hosts (which
2228 is what is supposed to happen).
2230 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2231 whoever called Exim into the -H file. In the case of the daemon it was
2232 behaving confusingly. When first started, it used values for whoever
2233 started the daemon, but after a SIGHUP it used the Exim user (because it
2234 calls itself on a restart). I have changed the code so that it now always
2237 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2238 message are rejected with the same error (e.g. no authentication or bad
2239 sender address), and a DATA command is nevertheless sent (as can happen
2240 with PIPELINING or a stupid MUA), the error message that was given to the
2241 RCPT commands is included in the rejection of the DATA command. This is
2242 intended to be helpful for MUAs that show only the final error to their
2245 PH/42 Another patch from the Sieve maintainer.
2247 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2248 Eximstats - Fixed some broken HTML links and added missing column headers
2250 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2251 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2253 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2255 PH/43 Yet another patch from the Sieve maintainer.
2257 PH/44 I found a way to check for a TCP/IP connection going away before sending
2258 the response to the final '.' that terminates a message, but only in the
2259 case where the client has not sent further data following the '.'
2260 (unfortunately, this is allowed). However, in many cases there won't be
2261 any further data because there won't be any more messages to send. A call
2262 to select() can be used: if it shows that the input is "ready", there is
2263 either input waiting, or the socket has been closed. An attempt to read
2264 the next input character can distinguish the two cases. Previously, Exim
2265 would have sent an OK response which the client would never have see.
2266 This could lead to message repetition. This fix should cure that, at
2267 least in a lot of common cases.
2269 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2270 advertised in response to EHLO.
2276 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2277 fixed by 4.65/MH/01 (is this a record?) are fixed:
2279 (i) An empty string was always treated as zero by the numeric comparison
2280 operators. This behaviour has been restored.
2282 (ii) It is documented that the numeric comparison operators always treat
2283 their arguments as decimal numbers. This was broken in that numbers
2284 starting with 0 were being interpreted as octal.
2286 While fixing these problems I realized that there was another issue that
2287 hadn't been noticed. Values of message_size_limit (both the global option
2288 and the transport option) were treated as octal if they started with 0.
2289 The documentation was vague. These values are now always treated as
2290 decimal, and I will make that clear in the documentation.
2296 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2297 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2300 MH/01 Don't check that the operands of numeric comparison operators are
2301 integers when their expansion is in "skipping" mode (fixes bug
2302 introduced by 4.64-PH/07).
2304 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2305 child addresses, Exim now panics and dies. Previously, because the count
2306 is held in a short int, deliveries were likely to be lost. As such a
2307 large number of recipients for a single message is ridiculous
2308 (performance will be very, very poor), I have chosen to impose a limit
2309 rather than extend the field.
2315 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2316 leftover -K file (the existence of which was triggered by #402).
2317 While we were at it, introduced process PID as part of the -K
2318 filename. This should rule out race conditions when creating
2321 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2322 processing considerably. Previous code took too long for large mails,
2323 triggering a timeout which in turn triggers #401.
2325 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2326 in the DK code in transports.c. sendfile() is not really portable,
2327 hence the _LINUX specificness.
2329 TF/01 In the add_headers option to the mail command in an Exim filter,
2330 there was a bug that Exim would claim a syntax error in any
2331 header after the first one which had an odd number of characters
2334 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2335 callout verification, Exim cached a "reject" for the entire domain. This
2336 is correct for most verifications, but it is not correct for a recipient
2337 verification with use_sender or use_postmaster set, because in that case
2338 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2339 case of MAIL FROM:<> rejection from other early rejections (e.g.
2340 rejection of HELO). When verifying a recipient using a non-null MAIL
2341 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2342 Whatever the result of the callout, the value of the domain cache is
2343 left unchanged (for any other kind of callout, getting as far as trying
2344 RCPT means that the domain itself is ok).
2346 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2349 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2350 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2351 session, the daemon ignores ECONNECT errors and logs others; it now
2352 ignores EPIPE as well.
2354 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2355 (quoted-printable decoding).
2357 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2358 later the small subsequent patch to fix an introduced bug.
2360 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2362 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2364 PH/08 An error is now given if message_size_limit is specified negative.
2366 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2367 to be given (somewhat) arbitrary names.
2369 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2372 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2373 miscellaneous code fixes
2375 PH/10 Added the log_reject_target ACL modifier to specify where to log
2378 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2379 hostname. This is wrong, because it relates to the incoming message (and
2380 probably the interface on which it is arriving) and not to the outgoing
2381 callout (which could be using a different interface). This has been
2382 changed to use the value of the helo_data option from the smtp transport
2383 instead - this is what is used when a message is actually being sent. If
2384 there is no remote transport (possible with a router that sets up host
2385 addresses), $smtp_active_hostname is used.
2387 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2388 tweaks were necessary in order to get it to work (see also 21 below):
2389 (a) The code assumed that strncpy() returns a negative number on buffer
2390 overflow, which isn't the case. Replaced with Exim's string_format()
2392 (b) There were several signed/unsigned issues. I just did the minimum
2393 hacking in of casts. There is scope for a larger refactoring.
2394 (c) The code used strcasecmp() which is not a standard C function.
2395 Replaced with Exim's strcmpic() function.
2396 (d) The code set only $1; it now sets $auth1 as well.
2397 (e) A simple test gave the error "authentication client didn't specify
2398 service in request". It would seem that Dovecot has changed its
2399 interface. Fortunately there's a specification; I followed it and
2400 changed what the client sends and it appears to be working now.
2402 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2405 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2406 address A is aliased to B and C, where B exists and C does not. Without
2407 -v the output is "A verified" because verification stops after a
2408 successful redirection if more than one address is generated. However,
2409 with -v the child addresses are also verified. Exim was outputting "A
2410 failed to verify" and then showing the successful verification for C,
2411 with its parentage. It now outputs "B failed to verify", showing B's
2412 parentage before showing the successful verification of C.
2414 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2415 look up a TXT record in a specific list after matching in a combined
2418 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2419 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2420 they consult the DNS. I had assumed they would set it the way they
2421 wanted; and indeed my experiments on Linux seem to show that in some
2422 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2423 To be on the safe side, however, I have now made the interface to
2424 host_find_byname() similar to host_find_bydns(), with an argument
2425 containing the DNS resolver options. The host_find_byname() function now
2426 sets these options at its start, just as host_find_bydns() does. The smtp
2427 transport options dns_qualify_single and dns_search_parents are passed to
2428 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2429 of host_find_byname() use the default settings of RES_DEFNAMES
2430 (qualify_single) but not RES_DNSRCH (search_parents).
2432 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2433 spool_read_header() do less string testing, by means of a preliminary
2434 switch on the second character of optional "-foo" lines. (This is
2435 overdue, caused by the large number of possibilities that now exist.
2436 Originally there were few.) While I was there, I also converted the
2437 str(n)cmp tests so they don't re-test the leading "-" and the first
2438 character, in the hope this might squeeze out yet more improvement.
2440 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2441 flag allowing group syntax was set by the header_syntax check but not
2442 turned off, possible causing trouble later; (2) The flag was not being
2443 set at all for the header_verify test, causing "group"-style headers to
2444 be rejected. I have now set it in this case, and also caused header_
2445 verify to ignore an empty address taken from a group. While doing this, I
2446 came across some other cases where the code for allowing group syntax
2447 while scanning a header line wasn't quite right (mostly, not resetting
2448 the flag correctly in the right place). These bugs could have caused
2449 trouble for malformed header lines. I hope it is now all correct.
2451 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2452 with the "reply" argument non-NULL. The code, however (which originally
2453 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2454 but it didn't always do it. This confused somebody who was copying the
2455 code for some other use. I have removed all the tests.
2457 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2458 feature that was used to support insecure browsers during the U.S. crypto
2459 embargo. It requires special client support, and Exim is probably the
2460 only MTA that supported it -- and would never use it because real RSA is
2461 always available. This code has been removed, because it had the bad
2462 effect of slowing Exim down by computing (never used) parameters for the
2463 RSA_EXPORT functionality.
2465 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2466 authenticator to fail if there's a tab character in the incoming data
2467 (there should never be unless someone is messing about, as it's supposed
2468 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2469 if the connection is using TLS or if the remote IP is the same as the
2470 local IP, and the "valid-client-cert option" if a client certificate has
2473 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2474 authenticators. This can be used for authorization after authentication
2475 succeeds. (In the case of plaintext, it servers for both authentication
2478 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2479 if any retry times were supplied.
2481 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2482 connection, where there is no client IP address to check. In this
2483 situation, the verify now always succeeds.
2485 PH/25 Applied John Jetmore's -Mset patch.
2487 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2489 PH/27 In a string expansion for a processed (not raw) header when multiple
2490 headers of the same name were present, leading whitespace was being
2491 removed from all of them, but trailing whitespace was being removed only
2492 from the last one. Now trailing whitespace is removed from each header
2493 before concatenation. Completely empty headers in a concatenation (as
2494 before) are ignored.
2496 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2497 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2499 PH/29 [Removed. This was a change that I later backed out, and forgot to
2500 correct the ChangeLog entry (that I had efficiently created) before
2501 committing the later change.]
2503 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2504 address errors (4xx response to RCPT) over the same connection as other
2505 messages routed to the same hosts. Such deliveries are always "forced",
2506 so retry times are not inspected. This resulted in far too many retries
2507 for the affected addresses. The effect occurred only when there were more
2508 hosts than the hosts_max_try setting in the smtp transport when it had
2509 the 4xx errors. Those hosts that it had tried were not added to the list
2510 of hosts for which the message was waiting, so if all were tried, there
2511 was no problem. Two fixes have been applied:
2513 (i) If there are any address or message errors in an SMTP delivery, none
2514 of the hosts (tried or untried) are now added to the list of hosts
2515 for which the message is waiting, so the message should not be a
2516 candidate for sending over the same connection that was used for a
2517 successful delivery of some other message. This seems entirely
2518 reasonable: after all the message is NOT "waiting for some host".
2519 This is so "obvious" that I'm not sure why it wasn't done
2520 previously. Hope I haven't missed anything, but it can't do any
2521 harm, as the worst effect is to miss an optimization.
2523 (ii) If, despite (i), such a delivery is accidentally attempted, the
2524 routing retry time is respected, so at least it doesn't keep
2525 hammering the server.
2527 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2528 in ${readsocket because some servers need this prod.
2530 PH/32 Added some extra debug output when updating a wait-xxx database.
2532 PH/33 The hint "could be header name not terminated by colon", which has been
2533 given for certain expansion errors for a long time, was not being given
2534 for the ${if def:h_colon_omitted{... case.
2536 PH/34 The spec says: "With one important exception, whenever a domain list is
2537 being scanned, $domain contains the subject domain." There was at least
2538 one case where this was not true.
2540 PH/35 The error "getsockname() failed: connection reset by peer" was being
2541 written to the panic log as well as the main log, but it isn't really
2542 panic-worthy as it just means the connection died rather early on. I have
2543 removed the panic log writing for the ECONNRESET error when getsockname()
2546 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2547 runs only) independently of the message's sender address. This meant
2548 that, if the 4xx error was in fact related to the sender, a different
2549 message to the same recipient with a different sender could confuse
2550 things. In particular, this can happen when sending to a greylisting
2551 server, but other circumstances could also provoke similar problems.
2552 I have changed the default so that the retry time for these errors is now
2553 based a combination of the sender and recipient addresses. This change
2554 can be overridden by setting address_retry_include_sender=false in the
2557 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2558 remote server are returned as part of bounce messages. This was not
2559 happening for LMTP over a pipe (the lmtp transport), but now it is the
2560 same for both kinds of LMTP.
2562 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2563 in header lines that were in fact CNAMEs. This is no longer the case.
2565 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2566 and queue runs started by the daemon processed all messages. This has
2567 been fixed so that -R and -S can now usefully be given with -q<time>.
2569 PH/40 Import PCRE release 6.7 (fixes some bugs).
2571 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2573 PH/42 Give an error if -q is specified more than once.
2575 PH/43 Renamed the variables $interface_address and $interface_port as
2576 $received_ip_address and $received_port, to make it clear that these
2577 values apply to message reception, and not to the outgoing interface when
2578 a message is delivered. (The old names remain recognized, of course.)
2580 PH/44 There was no timeout on the connect() call when using a Unix domain
2581 socket in the ${readsocket expansion. There now is.
2583 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2584 be meaningful with "accept".
2586 SC/01 Eximstats V1.43
2587 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2589 SC/02 Eximstats V1.44
2590 Use a glob alias rather than an array ref in the generated
2591 parser. This improves both readability and performance.
2593 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2594 Collect SpamAssassin and rejection statistics.
2595 Don't display local sender or destination tables unless
2596 there is data to show.
2597 Added average volumes into the top table text output.
2599 SC/04 Eximstats V1.46
2600 Collect data on the number of addresses (recipients)
2601 as well as the number of messages.
2603 SC/05 Eximstats V1.47
2604 Added 'Message too big' to the list of mail rejection
2605 reasons (thanks to Marco Gaiarin).
2607 SC/06 Eximstats V1.48
2608 Mainlog lines which have GMT offsets and are too short to
2609 have a flag are now skipped.
2611 SC/07 Eximstats V1.49 (Alain Williams)
2612 Added the -emptyok flag.
2614 SC/08 Eximstats V1.50
2615 Fixes for obtaining the IP address from reject messages.
2617 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2618 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2619 whitespace changes from 4.64-PH/27
2621 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2624 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2625 are found, allow negative numbers in numeric criteria)
2627 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2629 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2630 to match changes made in 4.64-PH/43
2632 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2634 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2635 "domain" is actually an IP address, and force a failure. This locks out
2636 those revolvers/nameservers that support "A-for-A" lookups, in
2637 contravention of the specifications.
2639 PH/48 When a host name was looked up from an IP address, and the subsequent
2640 forward lookup of the name timed out, the host name was left in
2641 $sender_host_name, contrary to the specification.
2643 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2644 restricted to single-key lookups, Exim was not diagnosing an error if
2645 * or *@ was used with a query-style lookup.
2647 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2649 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2650 long ago, but noone interested enough thought of it. Let's just say that
2651 the "1.1" means that there are some new functions that weren't there at
2652 some point in the past.
2654 PH/51 Error processing for expansion failure of helo_data from an smtp
2655 transport during callout processing was broken.
2657 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2658 tested/used via the -bh/-bhc/-bs options.
2660 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2661 bug, fixed in subsequent PCRE releases).
2663 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2664 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2666 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2672 SC/01 Use a glob alias rather than an array ref in eximstats generated
2673 parser. This improves both readability and performance.
2675 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2676 Don't display local sender or destination tables in eximstats unless
2677 there is data to show.
2678 Added average volumes into the eximstats top table text output.
2680 SC/03 Collect data on the number of addresses (recipients) as well
2681 as the number of messages in eximstats.
2683 TF/01 Correct an error in the documentation for the redirect router. Exim
2684 does (usually) call initgroups() when daemonizing.
2686 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2687 with consistent privilege compared to when running as a daemon.
2689 TF/03 Note in the spec that $authenticated_id is not set for local
2690 submissions from trusted users.
2692 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2693 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2695 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2696 by adding some example configuration directives to the default
2697 configuration file. A little bit of work is required to uncomment the
2698 directives and define how usernames and passwords are checked, but
2699 there is now a framework to start from.
2701 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2702 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2703 without this. I don't know how relevant this is to other LDAP libraries.
2705 PH/02 Add the verb name to the "unknown ACL verb" error.
2707 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2709 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2711 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2712 directory not expanded when it should be if an expanded home directory
2713 was set for the address (which is overridden by the transport).
2715 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2718 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2719 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2720 because it is too late at that time, and has no effect.
2722 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2723 security issue with \' (bugzilla #107). I could not use the
2724 PQescapeStringConn() function, because it needs a PGconn value as one of
2727 PH/08 When testing addresses using -bt, indicate those final addresses that
2728 are duplicates that would not cause an additional delivery. At least one
2729 person was confused, thinking that -bt output corresponded to deliveries.
2730 (Suppressing duplicates isn't a good idea as you lose the information
2731 about possibly different redirections that led to the duplicates.)
2733 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2734 systems where poll() doesn't work, in particular OS X.
2736 PH/10 Added more information to debugging output for retry time not reached.
2738 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2739 operations in malware.c.
2741 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2744 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2745 syslog_duplication set false, log lines that would normally be written
2746 both the the main log and to the reject log were not written to syslog at
2749 PH/14 In the default configuration, change the use of "message" in ACL warn
2750 statements to "add_header".
2752 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2753 not followed by a command (e.g. "seen endif").
2755 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2756 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2759 PH/17 Added extra conditions to the default value of delay_warning_condition
2763 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2764 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2765 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2768 The Auto-Submitted: and various List- headers are standardised, whereas I
2769 don't think Precedence: ever was.
2771 PH/18 Refactored debugging code in route_finduser() to show more information,
2772 in particular, the error code if getpwnam() issues one.
2774 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2775 This is apparently needed in addition to the PH/07 change above to avoid
2776 any possible encoding problems.
2778 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2779 but not after initializing Perl.
2781 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2782 output them only if debugging. By default they are written stderr,
2783 apparently, which is not desirable.
2785 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2788 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2791 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2793 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2794 authenticated or an ident call has been made. Suppress the default
2795 values for $authenticated_id and $authenticated_sender (but permit -oMai
2796 and -oMas) when testing with -bh.
2798 PH/24 Re-jigged the order of the tests in the default configuration so that the
2799 tests for valid domains and recipients precede the DNS black list and CSA
2800 tests, on the grounds that those ones are more expensive.
2802 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2803 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2804 This bug exists in every version of Exim that I still have, right back to
2807 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2808 However, an attempt to turn on case-sensitivity in a regex key by
2809 including (?-i) didn't work because the subject string was already
2810 lowercased, and the effects were non-intuitive. It turns out that a
2811 one-line patch can be used to allow (?-i) to work as expected.
2817 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2818 other effects) broke the use of negated acl sub-conditions.
2820 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2823 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2824 "Deny" causes Exim to reject the incoming connection with a 554 error.
2825 Unfortunately, if there is a major crisis, such as a disk failure,
2826 tcp-wrappers gives "deny", whereas what one would like would be some
2827 kind of temporary error. A kludge has been added to help with this.
2828 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2829 554 error is used if errno is still zero or contains ENOENT (which occurs
2830 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2833 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2835 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2836 errors. Otherwise a message that provokes a temporary error (when other
2837 messages do not) can cause a whole host to time out.
2839 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2840 addresses were routed directly to files or pipes from a redirect router.
2841 File deliveries just didn't batch; pipe deliveries might have suffered
2844 PH/06 A failure to get a lock for a hints database would erroneously always say
2845 "Failed to get write lock", even when it was really a read lock.
2847 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2848 of 0600. This has been changed to use the value of the lockfile_mode
2849 option (which defaults to 0600).
2851 PH/08 Applied small patch from the Sieve maintainer.
2853 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2854 folder from quota calculations, a direct delivery into this folder messed
2855 up the contents of the maildirsize file. This was because the regex was
2856 used only to exclude .Trash (or whatever) when the size of the mailbox
2857 was calculated. There was no check that a delivery was happening into an
2858 excluded directory. This bug has been fixed by ignoring all quota
2859 processing for deliveries into excluded directories.
2861 PH/10 Added the maildirfolder_create_regex option to appendfile.
2867 PH/01 The code for finding all the local interface addresses on a FreeBSD
2868 system running IPv6 was broken. This may well have applied to all BSD
2869 systems, as well as to others that have similar system calls. The broken
2870 code found IPv4 interfaces correctly, but gave incorrect values for the
2871 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2872 that it would not match correctly against @[] and not recognize the IPv6
2875 PH/02 The ipliteral router was not recognizing addresses of the form user@
2876 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2878 PH/03 Added disable_ipv6.
2880 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2881 decoded form, because it is most often used to construct To: headers
2882 lines in autoreplies, and the decoded form may well be syntactically
2883 invalid. However, $reply_address has leading white space removed, and all
2884 newlines turned into spaces so that the autoreply transport does not
2887 PH/05 If group was specified without a user on a router, and no group or user
2888 was specified on a transport, the group from the router was ignored.
2890 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2891 for visible compile-time settings that can be used to change these
2892 numbers, for those that want even more. Backwards compatibility with old
2893 spool files has been maintained. However, going back to a previous Exim
2894 release will lost any variables that are in spool files.
2896 PH/07 Two small changes when running in the test harness: increase delay when
2897 passing a TCP/IP connection to a new process, in case the original
2898 process has to generate a bounce, and remove special handling of
2899 127.0.0.2 (sic), which is no longer necessary.
2901 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2902 be the same on different OS.
2904 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2907 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2908 whether --show-vars was specified or not
2910 JJ/02 exipick: Added support for new ACL variable spool format introduced
2913 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2914 syntactically invalid From: or Reply-to: line, and a filter used this to
2915 generate an autoreply, and therefore failed to obtain an address for the
2916 autoreply, Exim could try to deliver to a non-existent relative file
2917 name, causing unrelated and misleading errors. What now happens is that
2918 it logs this as a hard delivery error, but does not attempt to create a
2921 PH/11 The exinext utility has a -C option for testing purposes, but although
2922 the given file was scanned by exinext itself; it wasn't being passed on
2923 when Exim was called.
2925 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2926 an end-of-file indication when reading a command response.
2928 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2929 compiled. In many other places in Exim, IPv6 addresses are always
2930 recognized, so I have changed this. It also means that IPv4 domain
2931 literals of the form [IPV4:n.n.n.n] are now always recognized.
2933 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2934 used if the router is not running as root, for example, when verifying at
2935 ACL time, or when using -bh. The debugging output from this situation was
2936 non-existent - all you got was a failure to exec. I have made two
2939 (a) Failures to set uid/gid, the current directory, or a process leader
2940 in a subprocess such as that created by queryprogram now generate
2941 suitable debugging output when -d is set.
2943 (b) The queryprogram router detects when it is not running as root,
2944 outputs suitable debugging information if -d is set, and then runs
2945 the subprocess without attempting to change uid/gid.
2947 PH/15 Minor change to Makefile for building test_host (undocumented testing
2950 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2951 additional section of a DNS packet that returns MX or SRV records.
2952 Instead, it always explicitly searches for A/AAAA records. This avoids
2953 major problems that occur when a DNS server includes only records of one
2954 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2955 fixed another bug: if SRV records were looked up and the corresponding
2956 address records were *not* found in the additional section, the port
2957 values from the SRV records were lost.
2959 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2960 using the correct key (the original address) when searching the retry
2961 rules in order to find which one to use for generating the retry hint.
2963 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2964 adding the default one. Similarly, if it contains a Reply-To: header, the
2965 errors_reply_to option, if set, is not used.
2967 PH/19 When calculating a retry time, Exim used to measure the "time since
2968 failure" by looking at the "first failed" field in the retry record. Now
2969 it does not use this if it is later than than the arrival time of the
2970 message. Instead it uses the arrival time. This makes for better
2971 behaviour in cases where some deliveries succeed, thus re-setting the
2972 "first failed" field. An example is a quota failure for a huge message
2973 when small messages continue to be delivered. Without this change, the
2974 "time since failure" will always be short, possible causing more frequent
2975 delivery attempts for the huge message than are intended.
2976 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2978 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2979 $1, $2, $3) because the numerical variables can be reset during some
2980 expansion items (e.g. "match"), thereby losing the authentication data.
2982 PH/21 Make -bV show the size of off_t variables so that the test suite can
2983 decide whether to run tests for quotas > 2G.
2985 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2986 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2987 filecount value is greater than 2G or if a quota value is greater than 2G
2988 on a system where the size of off_t is not greater than 4, a panic error
2991 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2992 never match. The debug and -bh output now contains an explicit error
2993 message indicating a malformed IPv4 address or mask.
2995 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2996 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2997 PH/23 above applies.
2999 PH/25 Do not write to syslog when running in the test harness. The only
3000 occasion when this arises is a failure to open the main or panic logs
3001 (for which there is an explicit test).
3003 PH/26 Added the /no_tell option to "control=freeze".
3005 PH/27 If a host name lookup failed very early in a connection, for example, if
3006 the IP address matched host_lookup and the reverse lookup yielded a name
3007 that did not have a forward lookup, an error message of the form "no IP
3008 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3009 could be logged. Now it outputs the IP address instead of "NULL".
3011 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3012 allows the sender and the authenticated sender to be set when
3013 submitting a message from within Exim. Since child_open_exim() is
3014 documented for local_scan(), the new function should be too.
3016 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3017 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3018 results in an empty string is now treated as unset.
3020 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3022 PH/31 Added sender_verify_fail logging option.
3024 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3025 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3026 tidied the source and removed it altogether.
3028 PH/33 When a queue run was abandoned because the load average was too high, a
3029 log line was always written; now it is written only if the queue_run log
3030 selector is set. In addition, the log line for abandonment now contains
3031 information about the queue run such as the pid. This is always present
3032 in "start" and "stop" lines but was omitted from the "abandon" line.
3034 PH/34 Omit spaces between a header name and the colon in the error message that
3035 is given when verify = headers_syntax fails (if there are lots of them,
3036 the message gets confusing).
3038 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3039 names, as there are now some PTR records that contain slashes. This check
3040 is only to protect against broken name servers that fall over on strange
3041 characters, so the fact that it applies to all lookups doesn't matter.
3043 PH/36 Now that the new test suite is complete, we can remove some of the
3044 special code in Exim that was needed for the old test suite. For example,
3045 sorting DNS records because real resolvers return them in an arbitrary
3046 order. The new test suite's fake resolver always returns records in the
3049 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3050 bounces) except when queue_only is set, to avoid logging races between
3051 the different processes.
3053 PH/38 Panic-die if .include specifies a non-absolute path.
3055 PH/39 A tweak to the "H" retry rule from its user.
3057 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3058 a label. They prevented compilation on older perls.
3060 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3061 a warning to be raised on newish perls.
3063 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3064 on queue. Changes to match documented behaviour of showing count of
3065 messages matching specified criteria.
3067 PH/40 Changed the default ident timeout from 30s to 5s.
3069 PH/41 Added support for the use of login_cap features, on those BSD systems
3070 that have them, for controlling the resources used by pipe deliveries.
3072 PH/42 The content-scanning code uses fopen() to create files in which to put
3073 message data. Previously it was not paying any attention to the mode of
3074 the files. Exim runs with umask(0) because the rest of the code creates
3075 files with open(), and sets the required mode explicitly. Thus, these
3076 files were ending up world-writeable. This was not a big issue, because,
3077 being within the spool directory, they were not world-accessible. I have
3078 created a function called modefopen, which takes an additional mode
3079 argument. It sets umask(777), creates the file, chmods it to the required
3080 mode, then resets the umask. All the relevant calls to fopen() in the
3081 content scanning code have been changed to use this function.
3083 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3084 to 24 hours. This avoids potential overflow problems when processing G
3085 and H retry rules. I suspect nobody ever tinkers with this value.
3087 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3089 PH/45 When the plaintext authenticator is running as a client, the server's
3090 challenges are checked to ensure they are valid base64 strings. By
3091 default, the authentication attempt is cancelled if an invalid string is
3092 received. Setting client_ignore_invalid_base64 true ignores these errors.
3093 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3094 they are received. Thus, the responses can be made to depend on the
3095 challenges. If an invalid string is ignored, an empty string is placed in
3098 PH/46 Messages that are created by the autoreply transport now contains a
3099 References: header, in accordance with RFCs 2822 and 3834.
3101 PH/47 Added authenticated_sender_force to the smtp transport.
3103 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3105 PH/49 Installed latest patch from the Sieve maintainer.
3107 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3108 was also set, the appendfile transport was unnecessarily scanning a
3109 directory of message files (e.g. for maildir delivery) to find the count
3110 of files (along with the size), even though it did not need this
3111 information. It now does the scan only if it needs to find either the
3112 size of the count of files.
3114 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3116 PH/52 Two bugs concerned with error handling when the smtp transport is
3119 (i) Exim was not creating retry information for temporary errors given
3120 for individual recipients after the DATA command when the smtp transport
3121 was used in LMTP mode. This meant that they could be retried too
3122 frequently, and not timed out correctly.
3124 (ii) Exim was setting the flag that allows error details to be returned
3125 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3126 recipients that were returned after the DATA command.
3128 PH/53 This is related to PH/52, but is more general: for any failing address,
3129 when detailed error information was permitted to be returned to the
3130 sender, but the error was temporary, then after the final timeout, only
3131 "retry timeout exceeded" was returned. Now it returns the full error as
3132 well as "retry timeout exceeded".
3134 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3135 do this, and (what is worse) MTAs that accept it.
3137 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3138 will now be deprecated.
3140 PH/56 New os.c-cygwin from the Cygwin maintainer.
3142 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3143 formats (previously only available in exim formats via -bpr, -bpru,
3144 and -bpra. Now also available in native and exiqgrep formats)
3146 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3147 with very large, slow to parse queues
3149 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3151 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3153 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3154 responses to authentication challenges, though it was showing the
3155 challenges; (ii) I've removed the CR characters from the debug output for
3158 PH/58 Allow for the insertion of a newline as well as a space when a string
3159 is turned into more than one encoded-word during RFC 2047 encoding. The
3160 Sieve code now uses this.
3162 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3163 data_4xx, lost_connection, tls_required.
3165 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3166 message was being sent as an SMTP response.
3168 PH/61 Add -l and -k options to exicyclog.
3170 PH/62 When verifying, if an address was redirected to one new address, so that
3171 verification continued, and the new address failed or deferred after
3172 having set something in $address_data, the value of $address_data was not
3173 passed back to the ACL. This was different to the case when no
3174 redirection occurred. The value is now passed back in both cases.
3176 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3177 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3178 use login_cap.h, so on its own it isn't the distinguishing feature. The
3179 new name refers directly to the setclassresources() function.
3181 PH/65 Added configuration files for NetBSD3.
3183 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3185 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3186 is preferred over IPv4.
3188 PH/68 The bounce_return_message and bounce_return_body options were not being
3189 honoured for bounces generated during the reception of non-SMTP messages.
3190 In particular, this applied to messages rejected by the ACL. This bug has
3191 been fixed. However, if bounce_return_message is true and bounce_return_
3192 body is false, the headers that are returned for a non-SMTP message
3193 include only those that have been read before the error was detected.
3194 (In the case of an ACL rejection, they have all been read.)
3196 PH/69 The HTML version of the specification is now built in a directory called
3197 spec_html instead of spec.html, because the latter looks like a path with
3198 a MIME-type, and this confuses some software.
3200 PH/70 Catch two compiler warnings in sieve.c.
3202 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3203 function verify_get_ident() calls ip_connect() to connect a socket, but
3204 if the "connect()" function timed out, ip_connect() used to close the
3205 socket. However, verify_get_ident() also closes the socket later, and in
3206 between Exim writes to the log, which may get opened at this point. When
3207 the socket was closed in ip_connect(), the log could get the same file
3208 descriptor number as the socket. This naturally causes chaos. The fix is
3209 not to close the socket in ip_connect(); the socket should be closed by
3210 the function that creates it. There was only one place in the code where
3211 this was missing, in the iplookup router, which I don't think anybody now
3212 uses, but I've fixed it anyway.
3214 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3215 well as to direct DNS lookups. Otherwise the handling of names in host
3216 lists is inconsistent and therefore confusing.
3222 PH/01 Two changes to the default runtime configuration:
3224 (1) Move the checks for relay_from_hosts and authenticated clients from
3225 after to before the (commented out) DNS black list checks.
3227 (2) Add control=submission to the relay_from_hosts and authenticated
3228 clients checks, on the grounds that messages accepted by these
3229 statements are most likely to be submissions.
3231 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3233 (1) Generate an error if the third argument for the ${prvs expansion is
3236 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3239 (3) Reset the variables that are obtained from the first argument of
3240 ${prvscheck and used in the second argument before leaving the code,
3241 because their memory is reclaimed, so using them afterwards may do
3244 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3245 one (it's much easier than Tom thought :-).
3247 (5) Because of (4), we can now allow for the use of $prvscheck_result
3248 inside the third argument.
3250 PH/03 For some reason, the default setting of PATH when running a command from
3251 a pipe transport was just "/usr/bin". I have changed it to
3254 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3255 anything to be listed in the output from -bV.
3257 PH/05 When a filter generated an autoreply, the entire To: header line was
3258 quoted in the delivery log line, like this:
3260 => >A.N.Other <ano@some.domain> <original@ddress> ...
3262 This has been changed so that it extracts the operative address. There
3263 may be more than one such address. If so, they are comma-separated, like
3266 => >ano@some.domain,ona@other.domain <original@ddress> ...
3268 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3269 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3270 not being looked up in the rDNS to get a host name, Exim was showing the
3271 IP address twice in Received: lines, even though the IP addresses were
3272 identical. For example:
3274 Received: from [1.2.3.4] (helo=[1.2.3.4])
3276 However, if the real host name was known, it was omitting the HELO data
3277 if it matched the actual IP address. This has been tidied up so that it
3278 doesn't show the same IP address twice.
3280 PH/07 When both +timestamp and +memory debugging was on, the value given by
3281 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3282 called by the debug printing, thereby overwriting the timestamp buffer.
3283 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3285 PH/08 When the original message was included in an autoreply transport, it
3286 always said "this is a copy of the message, including all the headers",
3287 even if body_only or headers_only was set. It now gives an appropriate
3290 PH/09 Applied a patch from the Sieve maintainer which:
3292 o fixes some comments
3293 o adds the (disabled) notify extension core
3294 o adds some debug output for the result of if/elsif tests
3295 o points to the current vacation draft in the documentation
3296 and documents the missing references header update
3300 o fixes a bug in processing the envelope test (when testing
3301 multiple envelope elements, the last element determined the
3304 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3305 Electronic Mail") by including:
3307 Auto-submitted: auto-generated
3309 in the messages that it generates (bounce messages and others, such as
3310 warnings). In the case of bounce messages for non-SMTP messages, there was
3311 also a typo: it was using "Auto_submitted" (underscore instead of
3312 hyphen). Since every message generated by Exim is necessarily in response
3313 to another message, thes have all been changed to:
3315 Auto-Submitted: auto-replied
3317 in accordance with these statements in the RFC:
3319 The auto-replied keyword:
3321 - SHOULD be used on messages sent in direct response to another
3322 message by an automatic process,
3324 - MUST NOT be used on manually-generated messages,
3326 - MAY be used on Delivery Status Notifications (DSNs) and Message
3327 Disposition Notifications (MDNs),
3329 - MUST NOT be used on messages generated by automatic or periodic
3330 processes, except for messages which are automatic responses to
3333 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3334 to the default Received: header definition.
3336 PH/12 Added log selector acl_warn_skipped (default on).
3338 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3339 variables because (a) they are in the wrong storage pool and (b) even if
3340 they were copied, it wouldn't work properly because of the caching.
3342 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3343 checking when decoding. Apparently there are clients that generate
3344 overlong encoded strings. Why am I not surprised?
3346 PH/15 If the first argument of "${if match_address" was not empty, but did not
3347 contain an "@" character, Exim crashed. Now it writes a panic log message
3348 and treats the condition as false.
3350 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3352 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3353 extension "envelope-auth". The code is finished and in agreement with
3354 other implementations, but there is no documentation so far and in fact,
3355 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3356 not changing the active code.
3358 Print executed "if" and "elsif" statements when debugging is used. This
3359 helps a great deal to understand what a filter does.
3361 Document more things not specified clearly in RFC3028. I had all this
3362 sorted out, when out of a sudden new issues came to my mind. Oops."
3364 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3367 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3368 canonical form (as documented). However, after a host name lookup from
3369 the IP address, check_host() was doing a simple string comparison with
3370 addresses acquired from the DNS when checking that the found name did
3371 have the original IP as one of its addresses. Since any found IPv6
3372 addresses are likely to be in abbreviated form, the comparison could
3373 fail. Luckily, there already exists a function for doing the comparison
3374 by converting both addresses to binary, so now that is used instead of
3375 the text comparison.
3377 PH/20 There was another similar case to PH/19, when a complete host name was
3378 given in a host list; looking up its IP address could give an abbreviated
3379 form, whereas the current host's name might or might not be abbreviated.
3380 The same fix has been applied.
3386 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3387 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3390 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3391 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3393 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3395 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3396 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3397 Also, for "Auto-Submitted", treat anything other than "no" as
3398 non-personal, in accordance with RFC 3834. (Previously it treated
3399 anything starting "auto-" as non-personal.)
3401 TF/01 The control=submission/name=... option had a problem with syntax
3402 errors if the name included a slash character. The /name= option
3403 now slurps the rest of the string, so it can include any characters
3404 but it must come last in the list of options (after /sender_retain
3407 PH/05 Some modifications to the interface to the fake nameserver for the new
3415 TK/01 Added the "success_on_redirect" address verification option. See
3416 NewStuff for rationale and an example.
3418 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3420 PH/02 Patch to exigrep to allow it to work on syslog lines.
3422 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3423 fread() to skip over the body file's header line, because in Cygwin the
3424 header line is locked and is inaccessible.
3426 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3427 co-exist for some time) to make it clear that it is the Exim ID that is
3428 referenced, not the Message-ID: header line.
3430 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3431 string_format() function, because snprintf() does not exist on all
3434 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3435 ${stat: expansion item.
3437 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3438 protocol synchronization error", to keep the pedants happy.
3440 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3441 well as for IRIX systems, when gcc is being used. See the host.c source
3444 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3446 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3449 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3450 transport and to the smtp transport in LMTP mode.
3452 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3454 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3455 run a filter in a subprocess. This could lead to confusion in subsequent
3456 lookups in the parent process. There should also be a search_tidyup() at
3457 the end of the subprocess.
3459 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3460 only if the host matched helo_try_verify_hosts, which caused the
3461 verification to occur when the EHLO/HELO command was issued. The ACL just
3462 tested the remembered result. Now, if a previous verification attempt has
3463 not happened, "verify = helo" does it there and then.
3465 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3467 TK/03 Fix log output including CR from clamd.
3469 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3470 exist provoked a memory error which could cause a segfault.
3472 PH/15 Installed PCRE 6.2
3474 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3476 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3477 of the problem. Specifically, suggested +O2 rather than +O1 for the
3480 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3482 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3483 record, the port was not correctly logged when the outgoing_port log
3484 selector was set (it logged the transort's default port).
3486 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3487 fallback_hosts, and "hosts" in the smtp transport.
3489 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3490 host errors such as "Connection refused".
3492 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3493 authentication with radiusclient 0.4.9:
3495 - Error returned from rc_read_config was caught wrongly
3496 - Username/password not passed on to radius server due to wrong length.
3498 The presumption is that some radiusclient API changes for 4.51/PH/17
3499 were not taken care of correctly. The code is still untested by me (my
3500 Linux distribution still has 0.3.2 of radiusclient), but it was
3501 contributed by a Radius user.
3503 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3504 expanding the "port" option of the smtp transport.
3506 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3507 while reading a MIME header. Thanks to Tom Hughes for a patch.
3509 PH/24 Include config.h inside local_scan.h so that configuration settings are
3512 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3513 that in an ACL for RCPT (for example), you can examine exactly what was
3516 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3517 commands, but it was not correctly comparing the address with the actual
3518 client host address. Thus, it would show the EHLO address in Received:
3519 header lines when this was not necessary.
3521 PH/27 Added the % operator to ${eval:}.
3523 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3524 it should be ignoring failures (because with -C, for example, it has lost
3525 privilege). It wasn't ignoring creation failures other than "already
3528 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3531 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3532 because an input line was too long, either on its own, or by virtue of
3533 too many continuations, the temporary file was not being removed, and the
3534 return code was incorrect.
3536 PH/31 Missing "BOOL" in function definition in filtertest.c.
3538 PH/32 Applied Sieve patches from the maintainer.
3540 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3542 PH/33 Added "verify = not_blind".
3544 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3545 Local/Makefile (with some defaults set). These are used in built scripts
3546 such as exicyclog, but they have never been used in the exim_install
3547 script (though there are many overriding facilities there). I have
3548 arranged that the exim_install script now takes note of these two
3551 PH/35 Installed configuration files for Dragonfly.
3553 PH/36 When a locally submitted message by a trusted user did not contain a
3554 From: header, and the sender address was obtained from -f or from an SMTP
3555 MAIL command, and the trusted user did not use -F to supply a sender
3556 name, $originator_name was incorrectly used when constructing a From:
3557 header. Furthermore, $originator_name was used for submission mode
3558 messages from external hosts without From: headers in a similar way,
3559 which is clearly wrong.
3561 PH/37 Added control=suppress_local_fixups.
3563 PH/38 When log_selector = +received_sender was set, and the addition of the
3564 sender made the log line's construction buffer exactly full, or one byte
3565 less than full, an overflow happened when the terminating "\n" was
3568 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3569 when the result of a list match is failure because a DNS lookup failed.
3571 PH/40 RM_COMMAND is now used in the building process.
3573 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3574 the "build-* directories that it finds.
3576 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3577 address in a domain literal was a prefix of an interface address.
3579 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3580 when verifying a sender address, unless rewrite_headers is false.
3582 PH/44 Wrote a long comment about why errors_to addresses are verified as
3583 recipients, not senders.
3585 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3586 the ratelimit ACL was added.
3588 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3590 PH/46 Added extra information about PostgreSQL errors to the error string.
3592 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3593 avoiding the need to install special zones in a real server. This is
3594 backwards compatible; if it can't find the fake resolver, it drops back.
3595 Thus, both old and new test suites can be run.
3597 TF/02 Added util/ratelimit.pl
3599 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3600 clock is set back in time.
3602 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3603 Candler <B.Candler@pobox.com>.
3605 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3606 OK for addresses that are the result of redirections.
3608 PH/48 A number of further additions for the benefit of the new test suite,
3609 including a fake gethostbyname() that interfaces to the fake DNS resolver
3612 TF/06 The fix for widen_domains has also been applied to qualify_single and
3613 search_parents which are the other dnslookup options that can cause
3616 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3619 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3621 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3622 service" if it encountered an MX record with an empty target hostname.
3623 The message is now "an MX or SRV record indicated no SMTP service".
3625 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3626 if the DNS of the sending site is misconfigured. This is quite a
3627 common situation. This change restores the behaviour of treating a
3628 helo verification defer as a failure.
3630 PH/51 If self=fail was set on a router, the bounce message did not include the
3631 actual error message.
3637 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3639 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3640 command itself ended in error, the underlying message about the transport
3641 filter timeout was being overwritten with the pipe command error. Now the
3642 underlying error message should be appended to the second error message.
3644 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3646 PH/02 Reduce the amount of output that "make" produces by default. Full output
3647 can still be requested.
3649 PH/03 The warning log line about a condition test deferring for a "warn" verb
3650 was being output only once per connection, rather than after each
3651 occurrence (because it was using the same function as for successful
3652 "warn" verbs). This seems wrong, so I have changed it.
3654 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3655 it should not have, which might have caused a crash in the right
3656 circumstances, but probably never did.
3658 PH/04 Installed a modified version of Tony Finch's patch to make submission
3659 mode fix the return path as well as the Sender: header line, and to
3660 add a /name= option so that you can make the user's friendly name appear
3663 TF/03 Added the control = fakedefer ACL modifier.
3665 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3666 Mark Lowes for thorough testing.
3668 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3670 TK/03 Merged latest SRS patch from Miles Wilton.
3672 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3673 with the definition in sysexits.h (which is #included earlier).
3674 Fortunately, Exim does not actually use EX_OK. The code used to try to
3675 preserve the sysexits.h value, by assuming that macro definitions were
3676 scanned for macro replacements. I have been disabused of this notion,
3677 so now the code just undefines EX_OK before #including unistd.h.
3679 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3680 in the smtp transport. When a block could not be written in a single
3681 write() function, the timeout was being re-applied to each part-write.
3682 This seems wrong - if the receiver was accepting one byte at a time it
3683 would take for ever. The timeout is now adjusted when this happens. It
3684 doesn't have to be particularly precise.
3686 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3687 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3689 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3690 without a domain if the check to <postmaster@domain> fails.
3692 SC/01 Eximstats: added -xls and the ability to specify output files
3693 (patch written by Frank Heydlauf).
3695 SC/02 Eximstats: use FileHandles for outputting results.
3697 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3699 SC/04 Eximstats: fixed display of large numbers with -nvr option
3701 SC/05 Eximstats: fixed merging of reports with empty tables.
3703 SC/06 Eximstats: added the -include_original_destination flag
3705 SC/07 Eximstats: removed tabs and trailing whitespace.
3707 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3709 TK/06 MBOX spool code: Add real "From " MBOX separator line
3710 so the .eml file is really in mbox format (even though
3711 most programs do not really care). Patch from Alex Miller.
3713 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3714 The latter is generated from $received_to and is only set if the
3715 message has one envelope recipient. SA can use these headers,
3716 obviously out-of-the-box. Patch from Alex Miller.
3718 PH/08 The ${def test on a variable was returning false if the variable's
3719 value was "0", contrary to what the specification has always said!
3720 The result should be true unless the variable is empty.
3722 PH/09 The syntax error of a character other than { following "${if
3723 def:variable_name" (after optional whitespace) was not being diagnosed.
3724 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3725 accidental colon was present, for example, could give incorrect results.
3727 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3728 result is used (not including appendfile, where other changes are about
3731 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3732 This involved changing a lot of size variables from int to off_t. It
3733 should work with maildirs and everything.
3735 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3736 spamd dying while we are connected to it.
3738 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3741 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3742 function for BDB 4.3.
3744 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3746 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3747 the sources for PCRE have been re-arranged and more files are now
3750 PH/15 The code I had for printing potentially long long variables in PH/11
3751 above was not the best (it lost precision). The length of off_t variables
3752 is now inspected at build time, and an appropriate printing format (%ld
3753 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3754 to be "long long int" or "long int". This is needed for the internal
3755 formatting function string_vformat().
3757 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3758 the configuration file to be ":syslog", then the script "guesses" where
3759 the logs files are, rather than using the compiled in default. In our
3760 case the guess is not the same as the compiled default, so the script
3761 suddenly stopped working when I started to use syslog. The patch checks
3762 to see if log_file_path is "". If so, it attempts to read it from exim
3763 with no configuration file to get the compiled in version, before it
3764 falls back to the previous guessing code."
3766 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3767 implementing BATV in an Exim configuration. See NewStuff for the gory
3770 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3771 Makefile that are specific to HP-UX.
3773 PH/18 If the "use_postmaster" option was set for a recipient callout together
3774 with the "random" option, the postmaster address was used as the MAIL
3775 FROM address for the random test, but not for the subsequent recipient
3776 test. It is now used for both.
3778 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3779 patch removes a few documentation additions to RFC 3028, because the
3780 latest draft now contains them. It adds the new en;ascii-case comparator
3781 and a new error check for 8bit text in MIME parts. Comparator and
3782 require names are now matched exactly. I enabled the subaddress
3783 extension, but it is not well tested yet (read: it works for me)."
3785 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3786 rework some of the code of TK/09 above to avoid the hardwired use of
3787 "%lld" and "long long". Replaced the call to snprintf() with a call to
3790 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3791 records point to non-existent hosts", "retry timeout exceeded", and
3792 "retry time not reached for any host after a long failure period".
3794 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3795 experimental DomainKeys support:
3797 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3798 (2) On an error such as an illegally used "control", the wrong name for
3799 the control was given.
3801 These problems did NOT occur unless DomainKeys support was compiled.
3803 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3805 PH/24 Added ${if match_ip condition.
3807 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3808 databases so that it will be absolutely obvious if a crash occurs in the
3809 DB library. This is a regular occurrence (often caused by mis-matched
3812 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3813 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3814 picked up on a user's system that detects such things. There doesn't seem
3815 to be a gcc warning option for this - only an attribute that has to be
3816 put on the function's prototype. It seems that in Fedora Core 4 they have
3817 set this on a number of new functions. No doubt there will be more in due
3820 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3821 specify a transport. However, if an address that was verified by such a
3822 router was the subject of a callout, Exim crashed because it tried to
3823 read the rcpt_include_affixes from the non-existent transport. Now it
3824 just assumes that the setting of that option is false. This bug was
3825 introduced by 4.51/PH/31.
3827 PH/28 Changed -d+all to exclude +memory, because that information is very
3828 rarely of interest, but it makes the output a lot bigger. People tend to
3829 do -d+all out of habit.
3831 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3832 code in os-type was giving problems when libc.so lives in lib64, like on
3835 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3836 aren't the modern standard, and it seems that some systems' include files
3837 don't always have them. Exim was already checking for some of the newer
3838 ones like T_AAAA, and defining it itself. I've added checks for all the
3839 record types that Exim uses.
3841 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3842 not automatically generating a new one, as it is supposed to. This
3843 prevented TLS from working. If the file did exist, but contained invalid
3844 data, a new version was generated, as expected. It was only the case of a
3845 non-existent file that was broken.
3847 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3848 with a change in libdomainkeys > 0.64.
3850 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3851 from DNS. If the selector record carries the flag, it now has
3852 precedence over the domain-wide flag.
3854 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3856 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3857 the use of a port name that isn't defined in /etc/services) occurred, the
3858 message was deferred as in a normal delivery, and thus remained on the
3859 spool, instead of being failed because of the mua_wrapper setting. This
3860 is now fixed, and I tidied up some of the mua_wrapper messages at the
3863 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3864 the messages in a hash of arrays rather than using individual hashes.
3865 This is a bit cleaner and results in dramatic memory savings, albeit
3866 at a slight CPU cost.
3868 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3869 as requested by Marc Sherman.
3871 SC/10 Eximstats: added histograms for user specified patterns as requested
3874 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3876 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3877 fopen() in the content-scanning modules that did not already have it.
3883 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3884 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3886 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3888 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3890 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3891 to test Sieve filters that use "vacation".
3893 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3894 that changes the way the GnuTLS parameters are stored in the cache file.
3895 The new format can be generated externally. For backward compatibility,
3896 if the data in the cache doesn't make sense, Exim assumes it has read an
3897 old-format file, and it generates new data and writes a new file. This
3898 means that you can't go back to an older release without removing the
3901 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3902 work if there are any delivery delays because "one_time" forces the
3903 parent to be marked "delivered", so its unseen clone is never tried
3904 again. For this reason, Exim now forbids the simultaneous setting of
3907 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3908 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3909 entry if you want to know the details. The fix, however, neglected to
3910 consider the case when local delivery batching is involved. The test for
3911 "previously delivered" was not happening when checking to see if an
3912 address could be batched with a previous (undelivered) one; under
3913 certain circumstances this could lead to multiple deliveries to the same
3916 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3917 in its include files, and this causes problems building Exim.
3919 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3920 header_syntax) but Exim was just ignoring anything given after a slash.
3921 In particular, this caused confusion with an attempt to use "verify =
3922 reverse_host_lookup/defer_ok". An error is now given when options are
3923 supplied for verify items that do not have them. (Maybe reverse_host_
3924 lookup should have a defer_ok option, but that's a different point.)
3926 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3927 defined by RFC 821) to 2048, because there were problems with some AUTH
3928 commands, and RFC 1869 says the size should be increased for extended
3929 SMTP commands that take arguments.
3931 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3934 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3935 "unknown" error; now it says that the functionality isn't in the binary.
3937 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3938 an address' error message when a string expansion fails (syntax or
3939 whatever). Otherwise the password may appear in the log. Following change
3940 PH/42 below, there is no longer a chance of it appearing in a bounce
3943 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3945 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3946 of its addresses was ever tried. (Bugzilla bug #2.)
3948 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3949 the result incorrectly in the debug output. (It correctly added a newline
3950 to what was transported.)
3952 TF/01 Added $received_time.
3954 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3955 commented out examples of how to interface to a virus scanner and to
3956 SpamAssassin. Also added commented examples of av_scanner and
3957 spamd_address settings.
3959 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3960 and controls are allowed in which ACLs. There were a couple of minor
3961 errors. Some of the entries in the conditions table (which is a table of
3962 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3963 negation of where the condition IS allowed.
3965 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3967 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3968 header file does not have a version number, so I've had to invent a new
3969 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3970 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3971 radiusclient), but it was contributed by a Radius user.
3973 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3974 files or directories, for OpenSSL.
3976 PH/19 When an Exim process that is running as root has to create an Exim log
3977 file, it does so in a subprocess that runs as exim:exim so as to get the
3978 ownership right at creation (otherwise, other Exim processes might see
3979 the file with the wrong ownership). There was no test for failure of this
3980 fork() call, which would lead to the process getting stuck as it waited
3981 for a non-existent subprocess. Forks do occasionally fail when resources
3982 run out. I reviewed all the other calls to fork(); they all seem to check
3985 PH/20 When checking for unexpected SMTP input at connect time (before writing
3986 the banner), Exim was not dealing correctly with a non-positive return
3987 from the read() function. If the client had disconnected by this time,
3988 the result was a log entry for a synchronization error with an empty
3989 string after "input=" when read() returned zero. If read() returned -1
3990 (an event I could not check), uninitialized data bytes were printed.
3991 There were reports of junk text (parts of files, etc) appearing after
3994 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3996 PH/22 Added support for macro redefinition, and (re)definition in between
3997 driver and ACL definitions.
3999 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4000 forgetting to use the resulting value; it was using the unexpanded value.
4002 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4003 hadn't been configured. The fix is from Juergen Kreileder, who
4004 understands it better than I do:
4006 "Here's what I see happening with three configured cyrus_sasl
4007 authenticators configured (plain, login, cram-md5):
4009 On startup auth_cyrus_sasl_init() gets called for each of these.
4010 This means three calls to sasl_listmech() without a specified mech_list.
4011 => SASL tests which mechs of all available mechs actually work
4012 => three warnings about OTP not working
4013 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4015 With the patch, sasl_listmech() also gets called three times. But now
4016 SASL's mech_list option is set to the server_mech specified in the the
4017 authenticator. Or in other words, the answer from sasl_listmech()
4018 gets limited to just the mech you're testing for (which is different
4020 => the return list contains just 'plain' or 'login', 'cram-md5' or
4021 nothing depending on the value of ob->server_mech.
4023 I've just tested the patch: Authentication still works fine,
4024 unavailable mechs specified in the exim configuration are still
4025 caught, and the auth.log warnings about OTP are gone."
4027 PH/25 When debugging is enabled, the contents of the command line are added
4028 to the debugging output, even when log_selector=+arguments is not
4031 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4032 answer is "GNU", and only if the return is "GNU/something" is the answer
4035 PH/27 $acl_verify_message is now set immediately after the failure of a
4036 verification in an ACL, and so is available in subsequent modifiers. In
4037 particular, the message can be preserved by coding like this:
4039 warn !verify = sender
4040 set acl_m0 = $acl_verify_message
4042 Previously, $acl_verify_message was set only while expanding "message"
4043 and "log_message" when a very denied access.
4045 PH/28 Modified OS/os.c-Linux with
4047 -#ifndef OS_LOAD_AVERAGE
4048 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4050 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4051 nomenclature these days.)
4053 PH/29 Installed patch from the Sieve maintainer that adds the options
4054 sieve_useraddress and sieve_subaddress to the redirect router.
4056 PH/30 In these circumstances:
4057 . Two addresses routed to the same list of hosts;
4058 . First host does not offer TLS;
4059 . First host accepts first address;
4060 . First host gives temporary error to second address;
4061 . Second host offers TLS and a TLS session is established;
4062 . Second host accepts second address.
4063 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4064 and peerdn, if requested) that were in fact used only for the second
4067 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4068 attention to any local part prefix or suffix that was matched by the
4069 router that accepted the address. It now behaves in the same way as it
4070 does for delivery: the affixes are removed from the local part unless
4071 rcpt_include_affixes is set on the transport.
4073 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4074 timeout during the DATA phase of an incoming message.
4076 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4077 applied a patch sanctioned by the Sieve maintainer.
4079 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4080 the uid or gid is negative. A case of a negative gid caused this to be
4081 noticed. The fix allows for either to be negative.
4083 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4084 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4087 PH/36 The change PH/12 above was broken. Fixed it.
4089 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4090 the grounds that routing the same address twice would always produce the
4091 same answer. This might have been true once, but it is certainly no
4092 longer true now. Routing a child address may depend on the previous
4093 routing that produced that child. Some complicated redirection strategies
4094 went wrong when messages had multiple recipients, and made Exim's
4095 behaviour dependent on the order in which the addresses were given.
4097 I have moved the duplicate checking until after the routing is complete.
4098 Exim scans the addresses that are assigned to local and remote
4099 transports, and removes any duplicates. This means that more work will be
4100 done, as duplicates will always all be routed, but duplicates are
4101 presumably rare, so I don't expect this is of any significance.
4103 For deliveries to pipes, files, and autoreplies, the duplicate checking
4104 still happens during the routing process, since they are not going to be
4107 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4108 It corrects a timeout issue with spamd. This is Ian's comment: "The
4109 background is that sometimes spamd either never reads data from a
4110 connection it has accepted, or it never writes response data. The exiscan
4111 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4112 blindly assumes that writes won't block so it may never time out."
4114 PH/39 Allow G after quota size as well as K and M.
4116 PH/40 The value set for $authenticated_id in an authenticator may not contain
4117 binary zeroes or newlines because the value is written to log lines and
4118 to spool files. There was no check on this. Now the value is run through
4119 the string_printing() function so that such characters are converted to
4120 printable escape sequences.
4122 PH/41 $message_linecount is a new variable that contains the total number of
4123 lines in the message. Compare $body_linecount, which is the count for the
4126 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4127 bounce and delay warning messages, except in certain special cases, which
4130 (a) An SMTP error message from a remote host;
4131 (b) A message specified in a :fail: redirection;
4132 (c) A message specified in a "fail" command in a system filter;
4133 (d) A message specified in a FAIL return from the queryprogram router;
4134 (e) A message specified by the cannot_route_message router option.
4136 In these cases only, Exim does include the error details in bounce and
4137 warning messages. There are also a few cases where bland messages such
4138 as "unrouteable address" or "local delivery error" are given.
4140 PH/43 $value is now also set for the "else" part of a ${run expansion.
4142 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4143 being worked on, but at least Exim now implements the latest version to
4146 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4147 process to complete was treated as a delivery failure, a timeout while
4148 writing the message to the pipe was logged, but erroneously treated as a
4149 successful delivery. Such timeouts include transport filter timeouts. For
4150 consistency with the overall process timeout, these timeouts are now
4151 treated as errors, giving rise to delivery failures by default. However,
4152 there is now a new Boolean option for the pipe transport called
4153 timeout_defer, which, if set TRUE, converts the failures into defers for
4154 both kinds of timeout. A transport filter timeout is now identified in
4157 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4158 systems where "make" and "gmake" are different, calling "gmake" at top
4159 level broke things. I've arranged for the value of $(MAKE) to be passed
4160 from the Makefile to this script so that it can call the same version of
4164 A note about Exim versions 4.44 and 4.50
4165 ----------------------------------------
4167 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4168 changes of various kinds. As a consequence, a big documentation update was
4169 needed. This delayed the release for rather longer than seemed good, especially
4170 in the light of a couple of (minor) security issues. Therefore, the changes
4171 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4172 release. So 4.44 and 4.50 are in effect two different branches that both start
4175 I have left the 4.50 change log unchanged; it contains all the changes since
4176 4.43. The change log for 4.44 is below; many of its items are identical to
4177 those for 4.50. This seems to be the most sensible way to preserve the
4178 historical information.
4184 1. Minor wording change to the doc/README.SIEVE file.
4186 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4187 computation of the current number of files was incorrect.
4189 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4190 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4193 4. Give more explanation in the error message when the command for a transport
4194 filter fails to execute.
4196 5. There are several places where Exim runs a non-Exim command in a
4197 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4198 was being done only for the command run by the queryprogram router. It is
4199 now done for all such subprocesses. The other cases are: ${run, transport
4200 filters, and the commands run by the lmtp and pipe transports.
4202 6. Added CONFIGURE_GROUP build-time option.
4204 7. Some older OS have a limit of 256 on the maximum number of file
4205 descriptors. Exim was using setrlimit() to set 1000 as a large value
4206 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4207 systems. I've change it so that if it can't get 1000, it tries for 256.
4209 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4210 was an oversight, and furthermore, ever since the addition of extra
4211 controls (e.g. 4.43/32), the checks on when to allow different forms of
4212 "control" were broken. There should now be diagnostics for all cases when a
4213 control that does not make sense is encountered.
4215 9. Added the /retain_sender option to "control=submission".
4217 10. $recipients is now available in the predata ACL (oversight).
4219 11. Tidy the search cache before the fork to do a delivery from a message
4220 received from the command line. Otherwise the child will trigger a lookup
4221 failure and thereby defer the delivery if it tries to use (for example) a
4222 cached ldap connection that the parent has called unbind on.
4224 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4225 of $address_data from the recipient verification was clobbered by the
4226 sender verification.
4228 13. The value of address_data from a sender verification is now available in
4229 $sender_address_data in subsequent conditions in the ACL statement.
4231 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4233 15. Added a new option "connect=<time>" to callout options, to set a different
4236 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4237 was its contents. (It was OK if the option was not defined at all.)
4239 17. A "Completed" log line is now written for messages that are removed from
4240 the spool by the -Mrm option.
4242 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4243 information about exactly what failed.
4245 19. Added -dd to debug only the daemon process.
4247 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4248 handles timeouts, both on the server side and network timeouts. Renamed the
4249 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4251 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4252 It is now set to "smtps".
4254 22. $host_address is now set to the target address during the checking of
4255 ignore_target_hosts.
4257 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4258 being passed; this would have caused $sender_host_name to have been used if
4259 matching the list had actually called for a host name (not very likely,
4260 since this list is usually IP addresses). A host name is now passed as
4263 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4264 code that specifies a non-restarting handler (typically sigaction() in
4265 modern systems) in an attempt to fix a rare and obscure crash bug.
4267 25. Narrowed the window for a race in the daemon that could cause it to ignore
4268 SIGCHLD signals. This is not a major problem, because they are used only to
4269 wake it up if nothing else does.
4271 26. A malformed maildirsize file could cause Exim to calculate negative values
4272 for the mailbox size or file count. Odd effects could occur as a result.
4273 The maildirsize information is now recalculated if the size or filecount
4276 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4277 support for a long time. Removed HAVE_SYS_VFS_H.
4279 28. Installed the latest version of exipick from John Jetmore.
4281 29. In an address list, if the pattern was not a regular expression, an empty
4282 subject address (from a bounce message) matched only if the pattern was an
4283 empty string. Non-empty patterns were not even tested. This was the wrong
4284 because it is perfectly reasonable to use an empty address as part of a
4285 database query. An empty address is now tested by patterns that are
4286 lookups. However, all the other forms of pattern expect the subject to
4287 contain a local part and a domain, and therefore, for them, an empty
4288 address still always fails if the pattern is not itself empty.
4290 30. Exim went into a mad DNS loop when attempting to do a callout where the
4291 host was specified on an smtp transport, and looking it up yielded more
4292 than one IP address.
4294 31. Re-factored the code for checking spool and log partition space into a
4295 function that finds that data and another that does the check. The former
4296 is then used to implement four new variables: $spool_space, $log_space,
4297 $spool_inodes, and $log_inodes.
4299 32. The RFC2047 encoding function was originally intended for short strings
4300 such as real names; it was not keeping to the 75-character limit for
4301 encoded words that the RFC imposes. It now respects the limit, and
4302 generates multiple encoded words if necessary. To be on the safe side, I
4303 have increased the buffer size for the ${rfc2047: expansion operator from
4306 33. It is now permitted to omit both strings after an "if" condition; if the
4307 condition is true, the result is "true". As before, when the second string
4308 is omitted, a false condition yields an empty string. This makes it less
4309 cumbersome to write custom ACL and router conditions.
4311 34. Failure to deliver a bounce message always caused it to be frozen, even if
4312 there was an errors_to setting on the router. The errors_to setting is now
4315 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4316 canonical form (fully expanded) before being placed in
4317 $sender_host_address.
4319 36. The table in the code that translates DNS record types into text (T_A to
4320 "A" for instance) was missing entries for NS and CNAME. It is just possible
4321 that this could have caused confusion if both these types were looked up
4322 for the same domain, because the text type is used as part of Exim's
4323 per-process caching. But the chance of anyone hitting this buglet seems
4326 37. The dnsdb lookup has been extended in a number of ways.
4328 (1) There is a new type, "zns", which walks up the domain tree until it
4329 finds some nameserver records. It should be used with care.
4331 (2) There is a new type, "mxh", which is like "mx" except that it returns
4332 just the host names, not the priorities.
4334 (3) It is now possible to give a list of domains (or IP addresses) to be
4335 looked up. The behaviour when one of the lookups defers can be
4336 controlled by a keyword.
4338 (4) It is now possible to specify the separator character for use when
4339 multiple records are returned.
4341 38. The dnslists ACL condition has been extended: it is now possible to supply
4342 a list of IP addresses and/or domains to be looked up in a particular DNS
4345 39. Added log_selector=+queue_time_overall.
4347 40. When running the queue in the test harness, wait just a tad after forking a
4348 delivery process, to get repeatability of debugging output.
4350 41. Include certificate and key file names in error message when GnuTLS fails
4351 to set them up, because the GnuTLS error message doesn't include the name
4352 of the failing file when there is a problem reading it.
4354 42. Allow both -bf and -bF in the same test run.
4356 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4358 44. The "Exiscan patch" is now merged into the mainline Exim source.
4360 45. Sometimes the final signoff response after QUIT could fail to get
4361 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4362 < 0 before doing a fflush(). This bug looks as though it goes back to the
4363 introduction of TLS in release 3.20, but "sometimes" must have been rare
4364 because the tests only now provoked it.
4366 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4367 (this can affect the format of dates).
4369 47. exim_tidydb, when checking for the continued existence of a message for
4370 which it has found a message-specific retry record, was not finding
4371 messages that were in split spool directories. Consequently, it was
4372 deleting retry records that should have stayed in existence.
4374 48. Steve fixed some bugs in eximstats.
4376 49. The SPA authentication driver was not abandoning authentication and moving
4377 on to the next authenticator when an expansion was forced to fail,
4378 contradicting the general specification for all authenticators. Instead it
4379 was generating a temporary error. It now behaves as specified.
4381 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4382 (the order specifies the preference for clients). The order is now AES256,
4383 AES128, 3DES, ARCFOUR128.
4385 51. Small patch to Sieve code - explicitly set From: when generating an
4388 52. Exim crashed if a remote delivery caused a very long error message to be
4389 recorded - for instance if somebody sent an entire SpamAssassin report back
4390 as a large number of 550 error lines. This bug was coincidentally fixed by
4391 increasing the size of one of Exim's internal buffers (big_buffer) that
4392 happened as part of the Exiscan merge. However, to be on the safe side, I
4393 have made the code more robust (and fixed the comments that describe what
4396 53. Now that there can be additional text after "Completed" in log lines (if
4397 the queue_time_overall log selector is set), a one-byte patch to exigrep
4398 was needed to allow it to recognize "Completed" as not the last thing in
4401 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4402 patch that reportedly fixes this has been added. I am not expert enough to
4403 create a test for it. This is what the patch creator wrote:
4405 "I found a little strange behaviour of ldap code when working with
4406 Windows 2003 AD Domain, where users was placed in more than one
4407 Organization Units. When I tried to give exim partial DN, the exit code
4408 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4409 But simultaneously result of request was absolutely normal ldap result,
4410 so I produce this patch..."
4412 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4413 REFERENCE, so I have modified the code to exclude the patch when that macro
4416 55. Some experimental protocols are using DNS PTR records for new purposes. The
4417 keys for these records are domain names, not reversed IP addresses. The
4418 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4419 leaves it alone. Component reversal etc. now happens only for IP addresses.
4422 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4424 57. Double the size of the debug message buffer (to 2048) so that more of very
4425 long debug lines gets shown.
4427 58. The exicyclog utility now does better if the number of log files to keep
4428 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4430 59. Two changes related to the smtp_active_hostname option:
4432 (1) $smtp_active_hostname is now available as a variable.
4433 (2) The default for smtp_banner uses $smtp_active_hostname instead
4434 of $primary_hostname.
4436 60. The host_aton() function is supposed to be passed a string that is known
4437 to be a valid IP address. However, in the case of IPv6 addresses, it was
4438 not checking this. This is a hostage to fortune. Exim now panics and dies
4439 if the condition is not met. A case was found where this could be provoked
4440 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4441 components; fortuitously, this particular loophole had already been fixed
4442 by change 4.50/55 above.
4444 If there are any other similar loopholes, the new check in host_aton()
4445 itself should stop them being exploited. The report I received stated that
4446 data on the command line could provoke the exploit when Exim was running as
4447 exim, but did not say which command line option was involved. All I could
4448 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4449 running as the user.
4452 61. There was a buffer overflow vulnerability in the SPA authentication code
4453 (which came originally from the Samba project). I have added a test to the
4454 spa_base64_to_bits() function which I hope fixes it.
4457 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4458 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4460 63. The daemon start-up calls getloadavg() while still root for those OS that
4461 need the first call to be done as root, but it missed one case: when
4462 deliver_queue_load_max is set with deliver_drop_privilege. This is
4463 necessary for the benefit of the queue runner, because there is no re-exec
4464 when deliver_drop_privilege is set.
4466 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4467 This has been fixed.
4469 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4470 was in use, was not putting the data itself into the right store pool;
4471 consequently, it could be overwritten for a subsequent message in the same
4472 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4475 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4477 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4478 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4479 the function were treating the return as a boolean value, which happened to
4480 work because 0=false and not-0=true, but is not correct code.
4482 68. The host_aton() function was not handling scoped IPv6 addresses (those
4483 with, for example, "%eth0" on the end) correctly.
4485 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4486 negated items (that is, ~something) in unsigned ints. Some compilers
4487 apparently mutter when there is no cast.
4489 70. If an address verification called from an ACL failed, and did not produce a
4490 user-specific message (i.e. there was only a "system" message), nothing was
4491 put in $acl_verify_message. In this situation, it now puts the system
4494 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4495 session; change 4.31/43 added the unwanted input to the log line - except
4496 that it did not do this in the start of session case. It now does.
4498 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4499 This is wrong and can cause the other end to generate a synchronization
4500 error if it is another Exim or anything else that does the synchronization
4501 check. A QUIT command is no longer sent after a timeout.
4503 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4504 during host lookups.
4506 74. The defer_ok option of callout verification was not working if it was used
4507 when verifying addresses in header lines, that is, for this case:
4509 verify = header_sender/callout=defer_ok
4511 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4512 those file descriptors could be used for SMTP connections. If anything
4513 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4514 could be sent to the SMTP client, causing chaos. The daemon now opens
4515 stdin, stdout, and stderr to /dev/null when it puts itself into the
4518 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4519 log by default. The user can override this with suitable Perl magic.
4521 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4522 the log message when discard triggers, was not working for the DATA ACL or
4523 for the non-SMTP ACL.
4525 78. Error message wording change in sieve.c.
4527 79. If smtp_accept_max_per_host was set, the number of connections could be
4528 restricted to fewer than expected, because the daemon was trying to set up
4529 a new connection before checking whether the processes handling previous
4530 connections had finished. The check for completed processes is now done
4531 earlier. On busy systems, this bug wouldn't be noticed because something
4532 else would have woken the daemon, and it would have reaped the completed
4535 80. If a message was submitted locally by a user whose login name contained one
4536 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4537 It caused a spool format error. I have fixed the spool reading code. A
4538 related problem was that the "from" clause in the Received: line became
4539 illegal because of the space(s). It is now covered by ${quote_local_part.
4541 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4544 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4546 83. Patch from Sieve maintainer to fix unterminated string problem in
4547 "vacation" handling.
4549 84. Some minor changes to the Linux configuration files to help with other
4550 OS variants using glibc.
4552 85. One more patch for Sieve to update vacation handling to latest spec.
4555 ----------------------------------------------------
4556 See the note above about the 4.44 and 4.50 releases.
4557 ----------------------------------------------------
4563 1. Change 4.43/35 introduced a bug that caused file counts to be
4564 incorrectly computed when quota_filecount was set in an appendfile
4567 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4568 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4571 3. Give more explanation in the error message when the command for a transport
4572 filter fails to execute.
4574 4. There are several places where Exim runs a non-Exim command in a
4575 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4576 was being done only for the command run by the queryprogram router. It is
4577 now done for all such subprocesses. The other cases are: ${run, transport
4578 filters, and the commands run by the lmtp and pipe transports.
4580 5. Some older OS have a limit of 256 on the maximum number of file
4581 descriptors. Exim was using setrlimit() to set 1000 as a large value
4582 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4583 systems. I've change it so that if it can't get 1000, it tries for 256.
4585 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4586 was an oversight, and furthermore, ever since the addition of extra
4587 controls (e.g. 4.43/32), the checks on when to allow different forms of
4588 "control" were broken. There should now be diagnostics for all cases when a
4589 control that does not make sense is encountered.
4591 7. $recipients is now available in the predata ACL (oversight).
4593 8. Tidy the search cache before the fork to do a delivery from a message
4594 received from the command line. Otherwise the child will trigger a lookup
4595 failure and thereby defer the delivery if it tries to use (for example) a
4596 cached ldap connection that the parent has called unbind on.
4598 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4599 of $address_data from the recipient verification was clobbered by the
4600 sender verification.
4602 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4603 was its contents. (It was OK if the option was not defined at all.)
4605 11. A "Completed" log line is now written for messages that are removed from
4606 the spool by the -Mrm option.
4608 12. $host_address is now set to the target address during the checking of
4609 ignore_target_hosts.
4611 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4612 being passed; this would have caused $sender_host_name to have been used if
4613 matching the list had actually called for a host name (not very likely,
4614 since this list is usually IP addresses). A host name is now passed as
4617 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4618 code that specifies a non-restarting handler (typically sigaction() in
4619 modern systems) in an attempt to fix a rare and obscure crash bug.
4621 15. Narrowed the window for a race in the daemon that could cause it to ignore
4622 SIGCHLD signals. This is not a major problem, because they are used only to
4623 wake it up if nothing else does.
4625 16. A malformed maildirsize file could cause Exim to calculate negative values
4626 for the mailbox size or file count. Odd effects could occur as a result.
4627 The maildirsize information is now recalculated if the size or filecount
4630 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4631 support for a long time. Removed HAVE_SYS_VFS_H.
4633 18. Updated exipick to current release from John Jetmore.
4635 19. Allow an empty sender to be matched against a lookup in an address list.
4636 Previously the only cases considered were a regular expression, or an
4639 20. Exim went into a mad DNS lookup loop when doing a callout where the
4640 host was specified on the transport, if the DNS lookup yielded more than
4643 21. The RFC2047 encoding function was originally intended for short strings
4644 such as real names; it was not keeping to the 75-character limit for
4645 encoded words that the RFC imposes. It now respects the limit, and
4646 generates multiple encoded words if necessary. To be on the safe side, I
4647 have increased the buffer size for the ${rfc2047: expansion operator from
4650 22. Failure to deliver a bounce message always caused it to be frozen, even if
4651 there was an errors_to setting on the router. The errors_to setting is now
4654 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4655 canonical form (fully expanded) before being placed in
4656 $sender_host_address.
4658 24. Updated eximstats to version 1.33
4660 25. Include certificate and key file names in error message when GnuTLS fails
4661 to set them up, because the GnuTLS error message doesn't include the name
4662 of the failing file when there is a problem reading it.
4664 26. Expand error message when OpenSSL has problems setting up cert/key files.
4667 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4668 (this can affect the format of dates).
4670 28. exim_tidydb, when checking for the continued existence of a message for
4671 which it has found a message-specific retry record, was not finding
4672 messages that were in split spool directories. Consequently, it was
4673 deleting retry records that should have stayed in existence.
4675 29. eximstats updated to version 1.35
4676 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4677 1.35 - bugfix such that pie charts by volume are generated correctly
4679 30. The SPA authentication driver was not abandoning authentication and moving
4680 on to the next authenticator when an expansion was forced to fail,
4681 contradicting the general specification for all authenticators. Instead it
4682 was generating a temporary error. It now behaves as specified.
4684 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4685 (the order specifies the preference for clients). The order is now AES256,
4686 AES128, 3DES, ARCFOUR128.
4688 31. Small patch to Sieve code - explicitly set From: when generating an
4691 32. Exim crashed if a remote delivery caused a very long error message to be
4692 recorded - for instance if somebody sent an entire SpamAssassin report back
4693 as a large number of 550 error lines. This bug was coincidentally fixed by
4694 increasing the size of one of Exim's internal buffers (big_buffer) that
4695 happened as part of the Exiscan merge. However, to be on the safe side, I
4696 have made the code more robust (and fixed the comments that describe what
4699 33. Some experimental protocols are using DNS PTR records for new purposes. The
4700 keys for these records are domain names, not reversed IP addresses. The
4701 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4702 leaves it alone. Component reversal etc. now happens only for IP addresses.
4705 34. The host_aton() function is supposed to be passed a string that is known
4706 to be a valid IP address. However, in the case of IPv6 addresses, it was
4707 not checking this. This is a hostage to fortune. Exim now panics and dies
4708 if the condition is not met. A case was found where this could be provoked
4709 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4710 components; fortuitously, this particular loophole had already been fixed
4711 by change 4.50/55 or 4.44/33 above.
4713 If there are any other similar loopholes, the new check in host_aton()
4714 itself should stop them being exploited. The report I received stated that
4715 data on the command line could provoke the exploit when Exim was running as
4716 exim, but did not say which command line option was involved. All I could
4717 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4718 running as the user.
4721 35. There was a buffer overflow vulnerability in the SPA authentication code
4722 (which came originally from the Samba project). I have added a test to the
4723 spa_base64_to_bits() function which I hope fixes it.
4726 36. The daemon start-up calls getloadavg() while still root for those OS that
4727 need the first call to be done as root, but it missed one case: when
4728 deliver_queue_load_max is set with deliver_drop_privilege. This is
4729 necessary for the benefit of the queue runner, because there is no re-exec
4730 when deliver_drop_privilege is set.
4732 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4733 was in use, was not putting the data itself into the right store pool;
4734 consequently, it could be overwritten for a subsequent message in the same
4735 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4738 38. Sometimes the final signoff response after QUIT could fail to get
4739 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4740 < 0 before doing a fflush(). This bug looks as though it goes back to the
4741 introduction of TLS in release 3.20, but "sometimes" must have been rare
4742 because the tests only now provoked it.
4748 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4749 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4750 Now it returns an integer. A number of calls were still expecting a T/F
4751 return. Fortuitously, in all cases, the tests worked in OK situations,
4752 which is the norm. However, things would have gone wrong on any write
4753 failures on the smtp file descriptor. This function is used when sending
4754 messages over SMTP and also when doing verify callouts.
4756 2. When Exim is called to do synchronous delivery of a locally submitted
4757 message (the -odf or -odi options), it no longer closes stderr before doing
4760 3. Implemented the mua_wrapper option.
4762 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4764 5. Implemented the functions header_remove(), header_testname(),
4765 header_add_at_position(), and receive_remove_recipient(), and exported them
4768 6. If an ACL "warn" statement specified the addition of headers, Exim already
4769 inserted X-ACL-Warn: at the start if there was no header name. However, it
4770 was not making this test for the second and subsequent header lines if
4771 there were newlines in the string. This meant that an invalid header could
4772 be inserted if Exim was badly configured.
4774 7. Allow an ACL "warn" statement to add header lines at the start or after all
4775 the Received: headers, as well as at the end.
4777 8. Added the rcpt_4xx retry error code.
4779 9. Added postmaster_mailfrom=xxx to callout verification option.
4781 10. Added mailfrom=xxxx to the callout verification option, for verify=
4784 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4785 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4787 12. Inserted some casts to stop certain compilers warning when using pointer
4788 differences as field lengths or precisions in printf-type calls (mostly
4789 affecting debugging statements).
4791 13. Added optional readline() support for -be (dynamically loaded).
4793 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4794 same clock tick as a message's arrival, so that its received time was the
4795 same as the "first fail" time on the retry record, and that message
4796 remained on the queue past the ultimate address timeout, every queue runner
4797 would try a delivery (because it was past the ultimate address timeout) but
4798 after another failure, the ultimate address timeout, which should have then
4799 bounced the address, did not kick in. This was a "< instead of <=" error;
4800 in most cases the first failure would have been in the next clock tick
4801 after the received time, and all would be well.
4803 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4804 being recognized when the domain list was tested by the match_domain
4805 condition in an expansion string.
4807 16. Added the ${str2b64: operator.
4809 17. Exim was always calling setrlimit() to set a large limit for the number of
4810 processes, without checking whether the existing limit was already
4811 adequate. (It did check for the limit on file descriptors.) Furthermore,
4812 errors from getrlimit() and setrlimit() were being ignored. Now they are
4813 logged to the main and panic logs, but Exim does carry on, to try to do its
4814 job under whatever limits there are.
4816 18. Imported PCRE 5.0.
4818 19. Trivial typo in log message " temporarily refused connection" (the leading
4821 20. If the log selector return_path_on_delivery was set and an address was
4822 redirected to /dev/null, the delivery process crashed because it assumed
4823 that a return path would always be set for a "successful" delivery. In this
4824 case, the whole delivery is bypassed as an optimization, and therefore no
4827 21. Internal re-arrangement: the function for sending a challenge and reading
4828 a response while authentication was assuming a zero-terminated challenge
4829 string. It's now changed to take a pointer and a length, to allow for
4830 binary data in such strings.
4832 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4834 23. Exim was not respecting finduser_retries when seeking the login of the
4835 uid under which it was called; it was always trying 10 times. (The default
4836 setting of finduser_retries is zero.) Also, it was sleeping after the final
4837 failure, which is pointless.
4839 24. Implemented tls_on_connect_ports.
4841 25. Implemented acl_smtp_predata.
4843 26. If the domain in control=submission is set empty, Exim assumes that the
4844 authenticated id is a complete email address when it generates From: or
4845 Sender: header lines.
4847 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4848 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4849 chown and chgrp in /bin and hostname in /usr/bin.
4851 28. Exim was keeping the "process log" file open after each use, just as it
4852 does for the main log. This opens the possibility of it remaining open for
4853 long periods when the USR1 signal hits a daemon. Occasional processlog
4854 errors were reported, that could have been caused by this. Anyway, it seems
4855 much more sensible not to leave this file open at all, so that is what now
4858 29. The long-running daemon process does not normally write to the log once it
4859 has entered its main loop, and it closes the log before doing so. This is
4860 so that log files can straightforwardly be renamed and moved. However,
4861 there are a couple of unusual error situations where the daemon does write
4862 log entries, and I had neglected to close the log afterwards.
4864 30. The text of an SMTP error response that was received during a remote
4865 delivery was being truncated at 512 bytes. This is too short for some of
4866 the long messages that one sometimes sees. I've increased the limit to
4869 31. It is now possible to make retry rules that apply only when a message has a
4870 specific sender, in particular, an empty sender.
4872 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4873 it possible to be selective about when SMTP synchronization is enforced.
4875 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4877 32. Implemented hosts_connection_nolog.
4879 33. Added an ACL for QUIT.
4881 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4884 35. Added mailbox_size and mailbox_filecount to appendfile.
4886 36. Added control = no_multiline_responses to ACLs.
4888 37. There was a bug in the logic of the code that waits for the clock to tick
4889 in the case where the clock went backwards by a substantial amount such
4890 that the microsecond fraction of "now" was more than the microsecond
4891 fraction of "then" (but the whole seconds number was less).
4893 38. Added support for the libradius Radius client library this is found on
4894 FreeBSD (previously only the radiusclient library was supported).
4900 1. When certain lookups returned multiple values in the form name=value, the
4901 quoting of the values was not always being done properly. Specifically:
4902 (a) If the value started with a double quote, but contained no whitespace,
4904 (b) If the value contained whitespace other than a space character (i.e.
4905 tabs or newlines or carriage returns) it was not quoted.
4906 This fix has been applied to the mysql and pgsql lookups by writing a
4907 separate quoting function and calling it from the lookup code. The fix
4908 should probably also be applied to nisplus, ibase and oracle lookups, but
4909 since I cannot test any of those, I have not disturbed their existing code.
4911 2. A hit in the callout cache for a specific address caused a log line with no
4912 reason for rejecting RCPT. Now it says "Previous (cached) callout
4913 verification failure".
4915 3. There was an off-by-one bug in the queryprogram router. An over-long
4916 return line was truncated at 256 instead of 255 characters, thereby
4917 overflowing its buffer with the terminating zero. As well as fixing this, I
4918 have increased the buffer size to 1024 (and made a note to document this).
4920 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4921 when Exim is waiting for an SMTP response from a remote server, Exim
4922 restarts its select() call on the socket, thereby resetting its timeout.
4923 This is not a problem when such interrupts are rare. Somebody set up a cron
4924 job to run exiwhat every 2 minutes, which is less than the normal select()
4925 timeout (5 or 10 minutes). This meant that the select() timeout never
4926 kicked in because it was always reset. I have fixed this by comparing the
4927 time when an interrupt arrives with the time at the start of the first call
4928 to select(). If more time than the timeout has elapsed, the interrupt is
4929 treated as a timeout.
4931 5. Some internal re-factoring in preparation for the addition of Sieve
4932 extensions (by MH). In particular, the "personal" test is moved to a
4933 separate function, and given an option for scanning Cc: and Bcc: (which is
4934 not set for Exim filters).
4936 6. When Exim created an email address using the login of the caller as the
4937 local part (e.g. when creating a From: or Sender: header line), it was not
4938 quoting the local part when it contained special characters such as @.
4940 7. Installed new OpenBSD configuration files.
4942 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4943 try to make them clearer.
4945 9. Callout options, other than the timeout value, were being ignored when
4946 verifying sender addresses in header lines. For example, when using
4948 verify = header_sender/callout=no_cache
4950 the cache was (incorrectly) being used.
4952 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4953 only the Cygwin environment.
4955 11. When return_path_on_delivery was set as a log selector, if different remote
4956 addresses in the same message used different return paths and parallel
4957 remote delivery occurred, the wrong values would sometimes be logged.
4958 (Whenever a remote delivery process finished, the return path value from
4959 the most recently started remote delivery process was logged.)
4961 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4962 lines when AUTH and/or TLS are in use. This is the "received protocol"
4963 field. Exim used to use "asmtp" for authenticated SMTP, without any
4964 indication (in the protocol name) for TLS use. Now it follows the RFC and
4965 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4966 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4967 names appear in log lines as well as in Received: header lines.
4969 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4970 extensions, and comparison tests, and to fix some bugs.
4972 14. Changes to the "personal" filter test:
4974 (1) The test was buggy in that it was just doing the equivalent of
4975 "contains" tests on header lines. For example, if a user's address was
4976 anne@some.where, the "personal" test would incorrectly be true for
4978 To: susanne@some.where
4980 This test is now done by extracting each address from the header in turn,
4981 and checking the entire address. Other tests that are part of "personal"
4982 are now done using regular expressions (for example, to check local parts
4983 of addresses in From: header lines).
4985 (2) The list of non-personal local parts in From: addresses has been
4986 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4987 taken from the Sieve specification recommendations.
4989 (3) If the message contains any header line starting with "List-" it is
4990 treated as non-personal.
4992 (4) The test for "circular" in the Subject: header line has been removed
4993 because it now seems ill-conceived.
4995 15. Minor typos in src/EDITME comments corrected.
4997 16. Installed latest exipick from John Jetmore.
4999 17. If headers_add on a router specified a text string that was too long for
5000 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5001 of string_sprintf() is now avoided.
5003 18. $message_body_size was not set (it was always zero) when running the DATA
5004 ACL and the local_scan() function.
5006 19. For the "mail" command in an Exim filter, no default was being set for
5007 the once_repeat time, causing a random time value to be used if "once" was
5008 specified. (If the value happened to be <= 0, no repeat happened.) The
5009 default is now 0s, meaning "never repeat". The "vacation" command was OK
5010 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5011 (I found it when inspecting the code).
5013 20. There is now an overall timeout for performing a callout verification. It
5014 defaults to 4 times the callout timeout, which applies to individual SMTP
5015 commands during the callout. The overall timeout applies when there is more
5016 than one host that can be tried. The timeout is checked before trying the
5017 next host. This prevents very long delays if there are a large number of
5018 hosts and all are timing out (e.g. when the network connections are timing
5019 out). The value of the overall timeout can be changed by specifying an
5020 additional sub-option for "callout", called "maxwait". For example:
5022 verify = sender/callout=5s,maxwait=20s
5024 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5025 to the end before writing, but this should make it even safer).
5027 22. Exim was forgetting that it had advertised PIPELINING for the second and
5028 subsequent messages on an SMTP connection. It was also not resetting its
5029 memory on STARTTLS and an internal HELO.
5031 23. When Exim logs an SMTP synchronization error within a session, it now
5032 records whether PIPELINING has been advertised or not.
5034 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5035 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5036 rather than long int.
5038 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5040 26. Added the never_mail option to autoreply.
5046 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5047 crash if the getsockname() call failed; this can happen if a connection is
5048 closed very soon after it is established. The problem was simply in the
5049 order in which certain operations were done, causing Exim to try to write
5050 to the SMTP stream before it had set up the file descriptor. The bug has
5051 been fixed by making things happen in the correct order.
5057 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5058 before the connection was closed, thus losing the rejection response.
5060 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5061 some early Solaris releases, but causes trouble in current releases where
5062 socklen_t is defined.
5064 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5067 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5070 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5071 that releasing the top of it at the end releases what was used for sub-
5072 expansions (unless the block got too big). However, discard this block if
5073 the first thing is a variable or header, so that we can use its block when
5074 it is dynamic (useful for very large $message_headers, for example).
5076 6. Lookups now cache *every* query, not just the most recent. A new, separate
5077 store pool is used for this. It can be recovered when all lookup caches are
5078 flushed. Lookups now release memory at the end of their result strings.
5079 This has involved some general refactoring of the lookup sources.
5081 7. Some code has been added to the store_xxx() functions to reduce the amount
5082 of flapping under certain conditions.
5084 8. log_incoming_interface used to affect only the <= reception log lines. Now
5085 it causes the local interface and port to be added to several more SMTP log
5086 lines, for example "SMTP connection from", and rejection lines.
5088 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5090 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5092 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5093 could be overwritten at the end of the current message (or the start of a
5094 new message if it was set in a HELO ACL). The value is now preserved for
5095 the duration of the SMTP connection.
5097 12. If a transport had a headers_rewrite setting, and a matching header line
5098 contained an unqualified address, that address was qualified, even if it
5099 did not match any rewriting rules. The underlying bug was that the values
5100 of the flags that permit the existence of unqualified sender and recipient
5101 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5102 non-local messages, and by -bnq for local messages) were not being
5103 preserved with the message after it was received.
5105 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5106 "next input=" as part of the text comprising the host identity instead of
5107 the correct text. The code was using the same buffer for two different
5108 strings. However, depending on which order the printing function evaluated
5109 its arguments, the bug did not always show up. Under Linux, for example, my
5110 test suite worked just fine.
5112 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5113 doesn't work with some older versions of Perl. It has been changed to "my",
5114 which in any case is probably the better facility to use.
5116 15. A really picky compiler found some instances of statements for creating
5117 error messages that either had too many or two few arguments for the format
5120 16. The size of the buffer for calls to the DNS resolver has been increased
5121 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5122 for addresses that have a lot of PTR records. This alleviates a problem; it
5123 does not fully solve it.
5125 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5126 buffer now truncates the list and logs the incident, which is the same
5127 action as happens when Exim is looking up a host name and its aliases.
5128 Previously in this situation something unpredictable would happen;
5129 sometimes it was "internal error: store_reset failed".
5131 18. If a server dropped the connection unexpectedly when an Exim client was
5132 using GnuTLS and trying to read a response, the client delivery process
5133 crashed while trying to generate an error log message.
5135 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5136 string, for example:
5138 warn message = H1: something\nH2: something
5140 the text was added as a single header line from Exim's point of view
5141 though it ended up OK in the delivered message. However, searching for the
5142 second and subsequent header lines using $h_h2: did not work. This has been
5143 fixed. Similarly, if a system filter added multiple headers in this way,
5144 the routers could not see them.
5146 20. Expanded the error message when iplsearch is called with an invalid key to
5147 suggest using net-iplsearch in a host list.
5149 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5150 ACLs are no longer actually imposed (and a message to that effect is
5153 22. If a "gecos" field in a passwd entry contained escaped characters, in
5154 particular, if it contained a \" sequence, Exim got it wrong when building
5155 a From: or a Sender: header from that name. A second bug also caused
5156 incorrect handling when an unquoted " was present following a character
5157 that needed quoting.
5159 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5160 was not being matched caselessly.
5162 24. Arranged for all hyphens in the exim.8 source to be escaped with
5165 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5166 properly. Recipient callout cache records were still being keyed to include
5167 the sender, even when use_sender was set false. This led to far more
5168 callouts that were necessary. The sender is no longer included in the key
5169 when use_sender is false.
5171 26. Added "control = submission" modifier to ACLs.
5173 27. Added the ${base62d: operator to decode base 62 numbers.
5175 28. dnsdb lookups can now access SRV records.
5177 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5178 the configuration file.
5180 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5181 (-v) mode. This makes the output for a verbose queue run more intelligible.
5183 31. Added a use_postmaster feature to recipient callouts.
5185 32. Added the $body_zerocount variable, containing the number of binary zero
5186 bytes in the message body.
5188 33. The time of last modification of the "new" subdirectory is now used as the
5189 "mailbox time last read" when there is a quota error for a maildir
5192 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5194 35. Added +ignore_unknown as a special item in host lists.
5196 36. Code for decoding IPv6 addresses in host lists is now included, even if
5197 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5198 address was recognized as an IP address, but was then not correctly decoded
5199 into binary, causing unexpected and incorrect effects when compared with
5206 1. Very minor rewording of debugging text in manualroute to say "list of
5207 hosts" instead of "hostlist".
5209 2. If verify=header_syntax was set, and a header line with an unqualified
5210 address (no domain) and a large number of spaces between the end of the
5211 name and the colon was received, the reception process suffered a buffer
5212 overflow, and (when I tested it) crashed. This was caused by some obsolete
5213 code that should have been removed. The fix is to remove it!
5215 3. When running in the test harness, delay a bit after writing a bounce
5216 message to get a bit more predictability in the log output.
5218 4. Added a call to search_tidyup() just before forking a reception process. In
5219 theory, someone could use a lookup in the expansion of smtp_accept_max_
5220 per_host which, without the tidyup, could leave open a database connection.
5222 5. Added the variables $recipient_data and $sender_data which get set from a
5223 lookup success in an ACL "recipients" or "senders" condition, or a router
5224 "senders" option, similar to $domain_data and $local_part_data.
5226 6. Moved the writing of debug_print from before to after the "senders" test
5229 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5230 problems for message scanning, either using a data ACL, or using
5231 local_scan() because the Received: header was not generated till after they
5232 were called (in order to set the time as the time of reception completion).
5233 I have revised the way this works. The header is now generated after the
5234 body is received, but before the ACL or local_scan() are called. After they
5235 are run, the timestamp in the header is updated.
5241 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5242 before starting a queue runner without re-exec. This happened only when
5243 deliver_drop_privilege was set or when the Exim user was set to root. The
5244 effect of the bug was that timeouts during subsequent deliveries caused
5245 crashes instead of being properly handled. The handler is now left at its
5246 default (and expected) setting.
5248 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5249 message, again when deliver_drop_privilege is set or Exim is run as root.
5250 The bug described in (1) was not present in this case, but the tidying up
5251 of the other signals was missing. I have made the two cases consistent.
5253 3. The ignore_target_hosts setting on a manualroute router was being ignored
5254 for hosts that were looked up using the /MX notation.
5256 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5259 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5260 operated on the sender address. After changing the $sender_address to <>
5261 for the sender address verify, Exim was re-instated it as the original
5262 (before rewriting) address, but remembering that it had rewritten it, so it
5263 wasn't rewriting it again. This bug also had the effect of breaking the
5264 sender address verification caching when the sender address was rewritten.
5266 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5267 This has been changed so that if the ip literal address matches
5268 ignore_target_hosts, the router declines.
5270 7. Added expansion conditions match_domain, match_address, and match_local_
5271 part (NOT match_host).
5273 8. The placeholder for the Received: header didn't have a length field set.
5275 9. Added code to Exim itself and to exim_lock to test for a specific race
5276 condition that could lead to file corruption when using MBX delivery. The
5277 issue is with the lockfile that is created in /tmp. If this file is removed
5278 after a process has opened it but before that process has acquired a lock,
5279 there is the potential for a second process to recreate the file and also
5280 acquire a lock. This could lead to two Exim processes writing to the file
5281 at the same time. The added code performs the same test as UW imapd; it
5282 checks after acquiring the lock that its file descriptor still refers to
5283 the same named file.
5285 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5286 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5289 11. Added the smtp_active_hostname option. If used, this will typically be made
5290 to depend on the incoming interface address. Because $interface_address is
5291 not set up until the daemon has forked a reception process, error responses
5292 that can happen earlier (such as "too many connections") no longer contain
5295 12. If an expansion in a condition on a "warn" statement fails because a lookup
5296 defers, the "warn" statement is abandoned, and the next ACL statement is
5297 processed. Previously this caused the whole ACL to be aborted.
5299 13. Added the iplsearch lookup type.
5301 14. Added ident_timeout as a log selector.
5303 15. Added tls_certificate_verified as a log selector.
5305 16. Added a global option tls_require_ciphers (compare the smtp transport
5306 option of the same name). This controls incoming TLS connections.
5308 17. I finally figured out how to make tls_require_ciphers do a similar thing
5309 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5310 before starting the TLS session.
5312 18. Tabs are now shown as \t in -bP output.
5314 19. If the log selector return_path_on_delivery was set, Exim crashed when
5315 bouncing a message because it had too many Received: header lines.
5317 20. If two routers both had headers_remove settings, and the first one included
5318 a superfluous trailing colon, the final name in the first list and the
5319 first name in the second list were incorrectly joined into one item (with a
5320 colon in the middle).
5326 1. Added -C and -D options to the exinext utility, mainly to make it easier
5327 to include in the automated testing, but these could be helpful when
5328 multiple configurations are in use.
5330 2. The exinext utility was not formatting the output nicely when there was
5331 an alternate port involved in the retry record key, nor when there was a
5332 message id as well (for retries that were specific to a specific message
5333 and a specific host). It was also confused by IPv6 addresses, because of
5334 the additional colons they contain. I have fixed the IPv4 problem, and
5335 patched it up to do a reasonable job for IPv6.
5337 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5338 delivery, the log line now contains "pipelined" if PIPELINING was used.
5340 4. An SMTP transport process used to panic and die if the bind() call to set
5341 an explicit outgoing interface failed. This has been changed; it is now
5342 treated in the same way as a connect() failure.
5344 5. A reference to $sender_host_name in the part of a conditional expansion
5345 that was being skipped was still causing a DNS lookup. This no longer
5348 6. The def: expansion condition was not recognizing references to header lines
5349 that used bh_ and bheader_.
5351 7. Added the _cache feature to named lists.
5353 8. The code for checking quota_filecount in the appendfile transport was
5354 allowing one more file than it should have been.
5356 9. For compatibility with Sendmail, the command line option
5364 and sets the incoming protocol and host name (for trusted callers). The
5365 host name and its colon can be omitted when only the protocol is to be set.
5366 Note the Exim already has two private options, -pd and -ps, that refer to
5367 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5368 "s", but I don't think that's a major issue.
5370 10. A number of refactoring changes to the code, none of which should affect
5373 (a) The number of logging options was getting close to filling up the
5374 32-bit word that was used as a bit map. I have split them into two classes:
5375 those that are passed in the argument to log_write(), and those that are
5376 only ever tested independently outside of that function. These are now in
5377 separate 32-bit words, so there is plenty of room for expansion again.
5378 There is no change in the user interface or the logging behaviour.
5380 (b) When building, for example, log lines, the code previously used a
5381 macro that called string_cat() twice, in order to add two strings. This is
5382 not really sufficiently general. Furthermore, there was one instance where
5383 it was actually wrong because one of the argument was used twice, and in
5384 one call a function was used. (As it happened, calling the function twice
5385 did not affect the overall behaviour.) The macro has been replaced by a
5386 function that can join an arbitrary number of extra strings onto a growing
5389 (c) The code for expansion conditions now uses a table and a binary chop
5390 instead of a serial search (which was left over from when there were very
5391 few conditions). Also, it now recognizes conditions like "pam" even when
5392 the relevant support is not compiled in: a suitably worded error message is
5393 given if an attempt is made to use such a condition.
5395 11. Added ${time_interval:xxxxx}.
5397 12. A bug was causing one of the ddress fields not to be passed back correctly
5398 from remote delivery subprocesses. The field in question was not being
5399 subsequently used, so this caused to problems in practice.
5401 13. Added new log selectors queue_time and deliver_time.
5403 14. Might have fixed a bug in maildirsizefile handling that threw up
5404 "unexpected character" debug warnings, and recalculated the data
5405 unnecessarily. In any case, I expanded the warning message to give more
5408 15. Added the message "Restricted characters in address" to the statements in
5409 the default ACL that block characters like @ and % in local parts.
5411 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5412 Three changes have been made:
5414 (a) There was a serious bug; a negative response to MAIL caused the whole
5415 recipient domain to be cached as invalid, thereby blocking all messages
5416 to all local parts at the same domain, from all senders. This bug has
5417 been fixed. The domain is no longer cached after a negative response to
5418 MAIL if the sender used is not empty.
5420 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5423 (c) A new callout option, "use_sender" has been added for people who want
5424 the modified behaviour.
5430 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5433 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5434 indeed breaks things for older releases.
5436 3. Added additional logging to the case where there is a problem reading data
5437 from a filter that is running in a subprocess using a pipe, in order to
5438 try to track down a specific problem.
5440 4. Testing facility fudge: when running in the test harness and attempting
5441 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5442 getting "No route to host". Convert this to a timeout.
5444 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5447 6. Some OS don't have socklen_t but use size_t instead. This affects the
5448 fifth argument of getsockopt() amongst other things. This is now
5449 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5450 can be set for individual OS. I have set it for SunOS5, OSF1, and
5451 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5452 some earlier ones do not.
5454 7. Change 4.30/15 was not doing the test caselessly.
5456 8. The standard form for an IPv6 address literal was being rejected by address
5457 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5458 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5459 this, as well as the form without the "IPv6" on the front (but only when
5460 address literals are enabled, of course).
5462 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5464 10. Exim crashed if a message with an empty sender address specified by -f
5465 encountered a router with an errors_to setting. This could be provoked only
5466 by a command such as
5470 where an empty string was supplied; "<>" did not hit this bug.
5472 11. Installed PCRE release 4.5.
5474 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5475 remained set. It is now erased.
5477 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5478 times from message ids (which are base 36 rather than the normal 62).
5480 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5481 were being counted as actual protocol errors, and logged if the log
5482 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5483 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5484 and DATA following a set of rejected RCPTs do not count as protocol errors.
5485 In other words, Exim assumes they were pipelined, though this may not
5486 actually be the case. Of course, in all cases the client gets an
5487 appropriate error code.
5489 15. If a lookup fails in an ACL condition, a message about the failure may
5490 be available; it is used if testing the ACL cannot continue, because most
5491 such messages specify what the cause of the deferral is. However, some
5492 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5493 that caused an old message to be retained and used if a later statement
5494 caused a defer, replacing the real cause of the deferral.
5496 16. If an IP address had so many PTR records that the DNS lookup buffer
5497 was not large enough to hold them, Exim could crash while trying to process
5498 the truncated data. It now detects and logs this case.
5500 17. Further to 4.21/58, another change has been made: if (and only if) the
5501 first line of a message (the first header line) ends with CRLF, a bare LF
5502 in a subsequent header line has a space inserted after it, so as not to
5503 terminate the header.
5505 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5506 unnecessarily, used atoi() instead of strtol(), and didn't check the
5507 termination when getting file sizes from file names by regex.
5509 19. Completely re-implemented the support for maildirsize files, in the light
5510 of a number of problems with the previous contributed implementation
5511 (4.30/29). In particular:
5513 . If the quota is zero, the maildirsize file is maintained, but no quota is
5516 . If the maildir directory does not exist, it is created before any attempt
5517 to write a maildirsize file.
5519 . The quota value in the file is just a cache; if the quota is changed in
5520 the transport, the new value overrides.
5522 . A regular expression is available for excluding directories from the
5525 20. The autoreply transport checks the characters in options that define the
5526 message's headers; it allows continued headers, but it was checking with
5527 isspace() after an embedded newline instead of explicitly looking for a
5530 21. If all the "regular" hosts to which an address was routed had passed their
5531 expiry times, and had not reached their retry times, the address was
5532 bounced, even if fallback hosts were defined. Now Exim should go on to try
5535 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5536 equivalent code in the SMTP transport. Some hosts send humungous responses
5537 to HELO/EHLO, more than 1024 it seems.
5539 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5540 gives compiler warnings in some environments. I've now done it "properly",
5543 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5544 (because of problems with the built-in one) was declared to return uschar *
5545 instead of char *, causing compiler failure.
5547 25. Fixed a file descriptor leak when processing alias/forward files.
5549 26. Fixed a minor format string issue in dbfn.c.
5551 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5553 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5554 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5557 29. When a sender address is verified, it is cached, to save repeating the test
5558 when there is more than one recipient in a message. However, when the
5559 verification involves a callout, it is possible for different callout
5560 options to be set for different recipients. It is too complicated to keep
5561 track of this in the cache, so now Exim always runs a verification when a
5562 callout is required, relying on the callout cache for the optimization.
5563 The overhead is duplication of the address routing, but this should not be
5566 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5567 to be verified with callout=postmaster, and the main callout worked but the
5568 postmaster check failed, the verification correctly failed. However, if a
5569 subsequent RCPT command asked for sender verification *without* the
5570 postmaster check, incorrect caching caused this verification also to fail,
5573 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5574 it was not caching the DNS options (qualify_single, search_parents) that
5575 were used when the lookup failed. A subsequent lookup with different
5576 options therefore always gave the same answer, though there were cases
5577 where it should not have. (Example: a "domains = !$mx_any" option on a
5578 dnslookup router: the "domains" option is always processed without any
5579 widening, but the router might have qualify_single set.) Now Exim uses the
5580 cached value only when the same options are set.
5582 32. Added John Jetmore's "exipick" utility to the distribution.
5584 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5585 than a timeout (e.g. a certificate is required, and is not provided), an
5586 Exim server now closes the connection immediately. Previously it waited for
5587 the client to close - but if the client is SSL, it seems that they each
5588 wait for each other, leading to a delay before one of them times out.
5590 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5591 maintained 0.8.x compatibility because I don't think many are using it, and
5592 it is clearly obsolete.
5594 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5597 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5598 client certificate was expired. A simple patch fixes this, though I don't
5599 understand the full logic of why the verify callback is called multiple
5602 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5603 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5604 which causes problems with some clients (such as the Certicom SSL Plus
5605 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5606 disables the coutermeasure allowing Eudora to connect."
5608 38. Exim was not checking that a write() to a log file succeeded. This could
5609 lead to Bad Things if a log got too big, in particular if it hit a file
5610 size limit. Exim now panics and dies if it cannot write to a log file, just
5611 as it does if it cannot open a log file.
5613 39. Modified OS/Makefile-Linux so that it now contains
5615 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5617 The two -D definitions ensure that Exim is compiled with large file
5618 support, which makes it possible to handle log files that are bigger than
5621 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5622 instance) a domain was checked against a named list that involved a lookup,
5623 causing $domain_data to be set, then another domain was checked against the
5624 same list, then the first domain was re-checked, the value of $domain_data
5625 after the final check could be wrong. In particular, if the second check
5626 failed, it could be set empty. This bug probably also applied to
5629 41. The strip_trailing_dot option was not being applied to the address given
5630 with the -f command-line option.
5632 42. The code for reading a message's header from the spool was incrementing
5633 $received_count, but never initializing it. This meant that the value was
5634 incorrect (doubled) while delivering a message in the same process in which
5635 it was received. In the most common configuration of Exim, this never
5636 happens - a fresh exec is done - but it can happen when
5637 deliver_drop_privilege is set.
5639 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5640 it now includes up to 150 characters of the unexpected data in the log
5643 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5644 and building data strings. The size of both of these buffers was 10 000
5645 bytes - far larger than anybody would *ever* want, thought I. Needless to
5646 say, somebody hit the limit. I have increased the maximum line length to
5647 20 000 and the maximum data length of concatenated lines to 100 000. I have
5648 also fixed two bugs, because there was no checking on these buffers. Tsk,
5649 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5650 buffer is too small.
5652 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5653 lsearch lookups. Now it does.
5655 46. When parsing a route_list item in a manualroute router, a fixed-length
5656 buffer was used for the list of hosts. I made this 1024 bytes long,
5657 thinking that nobody would ever have a list of hosts that long. Wrong.
5658 Somebody had a whole pile of complicated expansion conditions, and the
5659 string was silently truncated, leading to an expansion error. It turns out
5660 that it is easier to change to an unlimited length (owing to other changes
5661 that have happened since this code was originally written) than to build
5662 structure for giving a limitation error. The length of the item that
5663 expands into the list of hosts is now unlimited.
5665 47. The lsearch lookup could not handle data where the length of text line was
5666 more than 4095 characters. Such lines were truncated, leading to shortened
5667 data being returned. It should now handle lines of any length.
5669 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5670 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5673 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5674 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5675 no longer happens in comment lines. A list of replacements is now placed
5676 at the head of all of the source files, except those whose only change is
5677 to replace PERL_COMMAND in the very first #! line.
5679 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5680 messages on the queue, with a bottom-up merge sort, using code contributed
5681 by Michael Haardt. This should make operations like -bp somewhat faster on
5682 large queues. It won't affect queue runners, except when queue_run_in_order
5685 51. Installed eximstats 1.31 in the distribution.
5687 52. Added support for SRV lookups to the dnslookup router.
5689 53. If an ACL referred to $message_body or $message_body_end, the value was not
5690 reset for any messages that followed in the same SMTP session.
5692 54. The store-handling optimization for building very long strings was not
5693 differentiating between the different store pools. I don't think this
5694 actually made any difference in practice, but I've tidied it.
5696 55. While running the routers to verify a sender address, $sender_address
5697 was still set to the sender address. This is wrong, because when routing to
5698 send a bounce to the sender, it would be empty. Therefore, I have changed
5699 it so that, while verifying a sender address, $sender_address is set to <>.
5700 (There is no change to what happens when verifying a recipient address.)
5702 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5703 target A or AAAA records (if not already returned) without resetting the
5704 qualify_single or search_parents options of the DNS resolver. These are
5705 inappropriate in this case because the targets of MX and SRV records must
5706 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5707 target that, when qualified, matched something in the local domain. These
5708 two options are now turned off when doing these lookups.
5710 57. It seems that at least some releases of Reiserfs (which does not have the
5711 concept of a fixed number of inodes) returns zero and not -1 for the
5712 number of available inodes. This interacted badly with check_spool_inodes,
5713 which assumed that -1 was the "no such thing" setting. What I have done is
5714 to check that the total number of inodes is greater than zero before doing
5715 the test of how many are available.
5717 58. When a "warn" ACL statement has a log_message modifier, the message is
5718 remembered, and not repeated. This is to avoid a lot of repetition when a
5719 message has many recipients that cause the same warning to be written.
5720 However, Exim was preserving the list of already written lines for an
5721 entire SMTP session, which doesn't seem right. The memory is now reset if a
5722 new message is started.
5724 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5725 debugging output unless log_rewrite was also set.
5727 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5728 of (int)(handle) when we know that handle contains (void *)(-1).
5730 61. The Exim daemon panic-logs an error return when it closes the incoming
5731 connection. However "connection reset by peer" seems to be common, and
5732 isn't really an error worthy of noting specially, so that particular error
5735 62. When Exim is trying to find all the local interfaces, it used to panic and
5736 die if the ioctl to get the interface flags failed. However, it seems that
5737 on at least one OS (Solaris 9) it is possible to have an interface that is
5738 included in the list of interfaces, but for which you get a failure error
5739 for this call. This happens when the interface is not "plumbed" into a
5740 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5741 failure of the "get flags" call assumes that the interface is down.
5743 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5744 makes life easier for people who are doing arithmetic on fields extracted
5745 from dates, where you often get leading zeros that should not be
5746 interpreted as octal.
5748 64. Added qualify_domain to the redirect router, to override the global
5751 65. If a pathologically long header line contained very many addresses (the
5752 report of this problem mentioned 10 000) and each of them was rewritten,
5753 Exim could use up a very large amount of memory. (It kept on making new
5754 copies of the header line as it rewrote, and never released the old ones.)
5755 At the expense of a bit more processing, the header rewriting function has
5756 been changed so that it no longer eats memory in this way.
5758 66. The generation of the Received: header has been moved from the time that a
5759 message starts to be received, to the time that it finishes. The timestamp
5760 in the Received: header should now be very close to that of the <= log
5761 line. There are two side-effects of this change:
5763 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5764 logged header lines no longer include the local Received: line, because
5765 it has not yet been created. The same applies to a copy of the message
5766 that is returned to a non-SMTP sender when a message is rejected.
5768 (b) When a filter file is tested using -bf, no additional Received: header
5769 is added to the test message. After some thought, I decided that this
5772 This change does not affect the value of $received_for. It is still set
5773 after address rewriting, but before local_scan() is called.
5775 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5777 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5778 gave an unhelpful panic error message, and a defer error. I have managed to
5779 change this behaviour so that it now rejects any supplied certificate,
5780 which seems right, as the list of acceptable certificates is empty.
5782 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5783 gave an unhelpful defer error. I have not managed to make this reject any
5784 supplied certificates, but the error message it gives is "no certificate
5785 supplied", which is not helpful.
5787 70. exigrep's output now also includes lines that are not associated with any
5788 message, but which match the given pattern. Implemented by a patch from
5789 Martin Sluka, which also tidied up the Perl a bit.
5791 71. Recipient callout verification, like sender verification, was using <> in
5792 the MAIL FROM command. This isn't really the right thing, since the actual
5793 sender may affect whether the remote host accepts the recipient or not. I
5794 have changed it to use the actual sender in the callout; this means that
5795 the cache record is now keyed on a recipient/sender pair, not just the
5796 recipient address. There doesn't seem to be a real danger of callout loops,
5797 since a callout by the remote host to check the sender would use <>.
5798 [SEE ABOVE: changed after hitting problems.]
5800 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5801 temporary errors. However, in the case of such a code being given after
5802 the end of a data transmission (i.e. after ".") Exim was failing to write
5803 a retry record for the message. (Yes, there was some broken host that was
5804 actually sending 8xx at this point.)
5806 73. An unknown lookup type in a host list could cause Exim to panic-die when
5807 the list was checked. (An example that provoked this was putting <; in the
5808 middle of a list instead of at the start.) If this happened during a DATA
5809 ACL check, a -D file could be left lying around. This kind of configuration
5810 error no longer causes Exim to die; instead it causes a defer error. The
5811 incident is still logged to the main and panic logs.
5813 74. Buglet left over from Exim 3 conversion. The message "too many messages
5814 in one connection" was written to the rejectlog but not the mainlog, except
5815 when address rewriting (yes!) was being logged.
5817 75. Added write_rejectlog option.
5819 76. When a system filter was run not as root (that is, when system_filter_user
5820 was set), the values of the $n variables were not being returned to the
5821 main process; thus, they were not subsequently available in the $sn
5824 77. Added +return_path_on_delivery log selector.
5826 78. A connection timeout was being treated differently from recipients deferred
5827 when testing hosts_max_try with a message that was older than the host's
5828 retry timeout. (The host should not be counted, thus allowing all hosts to
5829 be tried at least once before bouncing.) This may have been the cause of an
5830 occasionally reported bug whereby a message would remain on the queue
5831 longer than the retry timeout, but would be bounced if a delivery was
5832 forced. I say "may" because I never totally pinned down the problem;
5833 setting up timeout/retry tests is difficult. See also the next item.
5835 79. The ultimate address timeout was not being applied to errors that involved
5836 a combination of host plus message (for example, a timeout on a MAIL
5837 command). When an address resolved to a number of possible hosts, and they
5838 were not all tried for each delivery (e.g. because of hosts_max_try), a
5839 message could remain on the queue longer than the retry timeout.
5841 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5844 81. Fixed an obscure SMTP outgoing bug which required at least the following
5845 conditions: (a) there was another message waiting for the same server;
5846 (b) the server returned 5xx to all RCPT commands in the first message so
5847 that the message was not completed; (c) the server dropped the connection
5848 or gave a negative response to the RSET that Exim sends to abort the
5849 transaction. The observed case was a dropped connection after DATA that had
5850 been sent in pipelining mode. That is, the server had advertised PIPELINING
5851 but was not implementing it correctly. The effect of the bug was incorrect
5852 behaviour, such as trying another host, and this could lead to a crash.
5858 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5859 and daemon.c were passed as pointers to ints; they should have been
5860 pointers to socklen_t variables (which are typically unsigned ints).
5862 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5865 3. Fixed a really odd bug that affected only the testing scheme; patching a
5866 certain fixed string in the binary changed the value of another string that
5867 happened to be identical to the end of the original first string.
5869 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5870 name", it returns that address as the IP address. On some operating
5871 systems (e.g. Solaris), it also passes back the IP address string as the
5872 "host name". However, on others (e.g. Linux), it passes back an empty
5873 string. Exim wasn't checking for this, and was changing the host name to an
5874 empty string, assuming it had been canonicalized.
5876 5. Although rare, it is permitted to have more than one PTR record for a given
5877 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5878 all the names associated with an address, because they do in Solaris.
5879 However, it seems that they do not in Linux for data that comes from the
5880 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5881 I found this out when I moved to a new Linux workstation and tried to run
5882 the Exim test suite.
5884 To get round this problem I have changed the code so that it now does its
5885 own call to the DNS to look up PTR records when searching for a host name.
5886 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5887 addresses that are only in /etc/hosts are still found.
5889 This behaviour is, however, controlled by an option called host_lookup_
5890 order, which defaults to "bydns:byaddr". If people want to use the other
5891 order, or indeed, just use one or the other means of lookup, they can
5892 specify it in this variable.
5894 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5895 some operating systems, this comes back from gethostbyaddr() as an empty
5896 string, and this is what Exim used to test for. However, it seems that in
5897 other systems, "." is yielded. Exim now tests for this case too.
5899 7. The values of check_spool_space and check_log_space are now held internally
5900 as a number of kilobytes instead of an absolute number of bytes. If a
5901 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5902 kilobyte. This means that much larger values can be stored.
5904 8. Exim monitor: an attempt to get the action menu when not actually pointing
5905 at a message produces an empty menu entitled "No message selected". This
5906 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5907 no entries in it ("Shell widget menu has zero width and/or height"). So I
5908 have added a single, blank menu entry in this case.
5910 9. Added ${quote_local_part.
5912 10. MIME decoding is now applied to the contents of Subject: header lines when
5915 11. Now that a reference to $sender_host_address automatically causes a reverse
5916 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5917 host lookup before query-style lookups in lists that might use this
5918 variable. This has therefore been abolished, and the "net-" prefix is no
5919 longer necessary for query-style lookups.
5921 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5922 have been a typo for LFLAGS, so it has been changed.
5924 13. The install script calls Exim with "-C /dev/null" in order to find the
5925 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5926 to be output. However, since Exim outputs its version number before the
5927 error, it didn't break the script. It just looked ugly. I fixed this by
5928 always allowing "-C /dev/null" if the caller is root.
5930 14. Ignore overlarge ACL variable number when reading spool file - insurance
5931 against a later release with more variables having written the file.
5933 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5934 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5935 this, as well as the form without the "IPv6" on the front.
5937 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5938 OS/Makefile-Darwin file.
5940 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5941 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5943 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5944 variable. However, some OS use ints for inodes. I've added cast to long int
5945 to get rid of the compiler warning.
5947 19. I had forgotten to lock out "/../" in configuration file names when
5948 ALT_CONFIG_PREFIX was set.
5950 20. Routers used for verification do not need to specify transports. However,
5951 if such a router generated a host list, and callout was configured, Exim
5952 crashed, because it could not find a port number from the (non-existent)
5953 transport. It now assumes port 25 in this circumstance.
5955 21. Added the -t option to exigrep.
5957 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5958 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5959 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5960 them is set, LOOKUP_LSEARCH is forced.
5962 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5964 24. Added sender and host information to the "rejected by local_scan()" log
5965 line; previously there was no indication of these.
5967 25. Added .include_if_exists.
5969 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5970 Linux. It turns out that not all file systems support this. Apparently some
5971 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5972 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5973 not supported on the file descriptor, is now ignored when Exim is trying to
5974 sync a directory. This applies only to Linux.
5976 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5978 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5979 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5982 29. Added support for maildirsize files from supplied patch (modified a bit).
5984 30. The use of :fail: followed by an empty string could lead Exim to respond to
5985 sender verification failures with (e.g.):
5987 550 Verification failed for <xxx>
5988 550 Sender verify failed
5990 where the first response line was missing the '-' that indicates it is not
5991 the final line of the response.
5993 31. The loop for finding the name of the user that called Exim had a hardwired
5994 limit of 10; it now uses the value of finduser_retries, which is used for
5995 all other user lookups.
5997 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6000 33. Exim was neglecting to zero errno before one call of strtol() when
6001 expanding a string and expecting an integer value. On some systems this
6002 resulted in spurious "integer overflow" errors. Also, it was casting the
6003 result into an int without checking.
6005 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6006 did not work. The code looks as if it has *never* worked, though it appears
6007 to have been documented since at least release 1.62. I have made it work.
6009 35. The "timeout_DNS" error in retry rules, also documented since at least
6010 1.62, also never worked. As it isn't clear exactly what this means, and
6011 clearly it isn't a major issue, I have abolished the feature by treating it
6012 as "timeout", and writing a warning to the main and panic logs.
6014 36. The display of retry rules for -brt wasn't always showing the error code
6017 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6018 timeout_connect_A, timeout_connect_MX.
6020 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6021 to the empty sender.
6023 39. The daemon was not analysing the content of -oX till after it had closed
6024 stderr and disconnected from the controlling terminal. This meant that any
6025 syntax errors were only noted on the panic log, and the return code from
6026 the command was 0. By re-arranging the code a little, I've made the
6027 decoding happen first, so such errors now appear on stderr, and the return
6028 code is 1. However, the actual setting up of the sockets still happens in
6029 the disconnected process, so errors there are still only recorded on the
6032 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6033 connections (as happens on some IP stacks) was logged at start up time as
6034 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6035 it from "IPv6 and IPv4", which means that two separate sockets are being
6038 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6039 says whether AF_INET or AF_INET6 was passed as an argument.
6041 42. Exiwhat output was messed up when time zones were included in log
6044 43. Exiwhat now gives more information about the daemon's listening ports,
6045 and whether -tls-on-connect was used.
6047 44. The "port" option of the smtp transport is now expanded.
6049 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6050 silently ignored. Now an error message is written to the main and panic
6053 46. There's a new ACL modifier called "logwrite" which writes to a log file
6054 as soon as it is encountered.
6056 47. Added $local_user_uid and $local_user_gid at routing time.
6058 48. Exim crashed when trying to verify a sender address that was being
6061 49. Exim was recognizing only a space character after ".include". It now also
6062 recognizes a tab character.
6064 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6065 extracting the relevant information from the specification. The man page no
6066 longer contains scrambled data for the -d option, and I've added a section
6067 at the front about calling Exim under different names.
6069 51. Added "extra_headers" argument to the "mail" command in filter files.
6071 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6074 53. Installed eximstats 1.29.
6076 54. Added transport_filter_timeout as a generic transport option.
6078 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6079 Cc: header lines. This was required by RFC 822, but it not required by RFC
6082 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6083 incoming messages that did not have them. Now it does so only if the
6084 message originates locally, that is, if there is no associated remote host
6085 address. When Resent- header lines are present, this applies to the Resent-
6086 lines rather than the non-Resent- lines.
6088 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6089 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6091 58. Messages for configuration errors now include the name of the main
6092 configuration file - useful now that there may be more than one file in a
6093 list (.included file names were always shown).
6095 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6096 for those rare installations that do not start the daemon as root or run it
6097 setuid root. I've cut out the call to initgroups() if the daemon is not
6100 60. The Exim user and group can now be bound into the binary as text strings
6101 that are looked up at the start of Exim's processing.
6103 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6105 62. Added $mailstore_basename variable.
6107 63. Installed patch to sieve.c from Michael Haardt.
6109 64. When Exim failed to open the panic log after failing to open the main log,
6110 the original message it was trying to log was written to stderr and debug
6111 output, but if they were not available (the usual case in production), it
6112 was lost. Now it is written to syslog before the two lines that record the
6113 failures to open the logs.
6115 65. Users' Exim filters run in subprocesses under the user's uid. It is
6116 possible for a "deliver" command or an alias in a "personal" command to
6117 provoke an address rewrite. If logging of address rewriting is configured,
6118 this fails because the process is not running as root or exim. There may be
6119 a better way of dealing with this, but for the moment (because 4.30 needs
6120 to be released), I have disabled address rewrite logging when running a
6121 filter in a non-root, non-exim process.
6127 1. The buildconfig auxiliary program wasn't quoting the value set for
6128 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6129 not defined. This bug was masked in 4.22 by the effect that was fixed in
6132 2. Some messages that were rejected after a message id was allocated were
6133 shown as "incomplete" by exigrep. It no longer does this for messages that
6134 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6136 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6137 have allow_domain_literals set, the ID did not get logged in the <= line.
6138 Domain literals are now always recognized in Message-ID: header lines.
6140 4. The first argument for a ${extract expansion item is the key name or field
6141 number. Leading and trailing spaces in this item were not being ignored,
6142 causing some misleading effects.
6144 5. When deliver_drop_privilege was set, single queue runner processes started
6145 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6146 same command in the process it spins off) were not dropping privilege.
6148 6. When the daemon running as "exim" started a queue runner, it always
6149 re-executed Exim in the spun-off process. This is a waste of effort when
6150 deliver_drop_privilege is set. The new process now just calls the
6151 queue-runner function directly.
6157 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6160 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6161 ignored. Though the use of -oP was forcing the writing of a pid file, it
6162 was always written to the default place.
6164 3. If the message "no IP address found for host xxxx" is generated during
6165 incoming verification, it is now followed by identification of the incoming
6166 connection (so you can more easily find what provoked it).
6168 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6170 5. Added some features to "harden" Exim a bit more against certain attacks:
6172 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6173 be put in Local/Makefile. This is like the never_users runtime option,
6174 but it cannot be overridden. The default setting is "root".
6176 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6177 prefix string with which any file named in a -C command line option
6180 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6181 is retained for -C and -D only if the caller of Exim is root. Without
6182 it, the exim user may also use -C and -D and retain privilege.
6184 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6185 command line option is disabled.
6187 6. Macro names set by the -D option must start with an upper case letter, just
6188 like macro names defined in the configuration file.
6190 7. Added "dereference=" facility to LDAP.
6192 8. Two instances of the typo "uknown" in the source files are fixed.
6194 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6195 the Configure-Makefile script screwed up while processing it.
6197 10. Incorporated PCRE 4.4.
6199 11. The SMTP synchronization check was not operating right at the start of an
6200 SMTP session. For example, it could not catch a HELO sent before the client
6201 waited for the greeting. There is now a check for outstanding input at the
6202 point when the greeting is written. Because of the duplex, asynchronous
6203 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6204 way, but not yet received, when the check is performed.
6206 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6207 on TCP/IP sockets, because this apparently causes some broken clients to
6210 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6211 unchanged) from the Cygwin maintainer.
6213 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6214 was supported instead of testing for mbx. Effectively a typo.
6216 15. The spa authenticator server code was not checking that the input it
6217 received was valid base64.
6219 16. The debug output line for the "set" modifier in ACLs was not showing the
6220 name of the variable that was being set.
6222 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6224 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6225 lookup on its own. Something else was needed to trigger the lookup. For
6226 example, a match in host_lookup or the need for a host name in a host list.
6227 Now, if $sender_host_name is referenced and the host name has not yet been
6228 looked up, a lookup is performed. If the lookup fails, the variable remains
6229 empty, and $host_lookup_failed is set to "1".
6231 19. Added "eqi" as a case-independent comparison operator.
6233 20. The saslauthd authentication condition could segfault if neither service
6234 nor realm was specified.
6236 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6237 error message that was logged was misleading, and incoming SMTP
6238 connections were dropped. The message is now more accurate, and temporary
6239 errors are given to SMTP connections.
6241 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6242 (except RSET) with a 421 error, until QUIT is received. However, it was
6243 failing to send a response to QUIT.
6245 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6246 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6247 ACL is now run after the helo_try_verify_hosts code.
6249 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6250 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6251 case-independent, so other case variants are also recognized). Apparently
6252 some systems use these upper case variants.
6254 25. If more than two messages were waiting for the same host, and a transport
6255 filter was specified for the transport, Exim sent two messages over the
6256 same TCP/IP connection, and then failed with "socket operation on non-
6257 socket" when it tried to send the third.
6259 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6261 27. The extern definition of crypt16() in expand.c was not being excluded when
6262 the OS had its own crypt16() function.
6264 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6265 as a preferred synonym for return_size_limit, both as an option and as an
6268 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6270 30. Changed the default configuration ACL to relax the local part checking rule
6271 for addresses that are not in any local domains. For these addresses,
6272 slashes and pipe symbols are allowed within local parts, but the sequence
6273 /../ is explicitly forbidden.
6275 31. SPA server authentication was not clearing the challenge buffer before
6278 32. log_message in a "warn" ACL statement was writing to the reject log as
6279 well as to the main log, which contradicts the documentation and doesn't
6280 seem right (because no rejection is happening). So I have stopped it.
6282 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6283 However, I am unable to do any testing of this.
6285 34. Fixed an infelicity in the appendfile transport. When checking directories
6286 for a mailbox, to see if any needed to be created, it was accidentally
6287 using path names with one or more superfluous leading slashes; tracing
6288 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6290 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6291 contents are added to the log line that is written for every discarded
6292 recipient. (Previously a log_message setting was ignored.)
6294 36. The ${quote: operator now quotes the string if it is empty.
6296 37. The install script runs exim in order to find its version number. If for
6297 some reason other than non-existence or emptiness, which it checks, it
6298 could not run './exim', it was installing it with an empty version number,
6299 i.e. as "exim-". This error state is now caught, and the installation is
6302 38. An argument was missing from the function that creates an error message
6303 when Exim fails to connect to the socket for saslauthd authentication.
6304 This could cause Exim to crash, or give a corrupted message.
6306 39. Added isip, isip4, and isip6 to ${if conditions.
6308 40. The ACL variables $acl_xx are now saved with the message, and can be
6309 accessed later in routers, transports, and filters.
6311 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6312 strings in the file are not string-expanded.
6314 42. If a MAIL command specified a SIZE value that was too large to fit into an
6315 int variable, the check against message_size_limit failed. Such values are
6316 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6317 day this will have to be increased, but I don't think I want to be around
6318 when emails are that large.
6325 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6326 iconv() is not standard in FreeBSD.
6328 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6329 IPv6 enabled. The observed symptom was a segmentation fault on return from
6330 the function os_common_find_running_interfaces() in src/os.c.
6332 3. In the check_special_case() function in daemon.c I had used "errno" as an
6333 argument name, which causes warnings on some systems. This was basically a
6334 typo, since it was named "eno" in the comments!
6336 4. The code that waits for the clock to tick (at a resolution of some fraction
6337 of a second) so as to ensure message-id uniqueness was always waiting for
6338 at least one whole tick, when it could have waited for less. [This is
6339 almost certainly not relevant at current processor speeds, where it is
6340 unlikely to ever wait at all. But we try to future-proof.]
6342 5. The function that sleeps for a time interval that includes fractions of a
6343 second contained a race. It did not block SIGALRM between setting the
6344 timer, and suspending (a couple of lines later). If the interval was short
6345 and the sigsuspend() was delayed until after it had expired, the suspension
6346 never ended. On busy systems this could lead to processes getting stuck for
6349 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6350 process, before it forks any delivery processes. The open lookup caching
6351 mechanism meant that the open file or database connection was passed into
6352 the delivery process. The problem was that delivery processes always tidy
6353 up cached lookup data. This could cause a problem for the next delivery
6354 process started by the queue runner, because the external queue runner
6355 process does not know about the closure. So the next delivery process
6356 still has data in the lookup cache. In the case of a file lookup, there was
6357 no problem because closing a file descriptor in a subprocess doesn't affect
6358 the parent. However, if the lookup was caching a connection to a database,
6359 the connection was closed, and the second delivery process was likely to
6360 see errors such as "PGSQL: query failed: server closed the connection
6361 unexpectedly". The problem has been fixed by closing all cached lookups
6362 in a queue runner before running a delivery process.
6364 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6365 seem to have the "const" qualifier which it has on other OS. I've
6368 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6369 *of the same type* (client or server) with the same public name that an
6370 error should be diagnosed.
6372 9. When Exim looked up a host name for an IP address, but failed to find the
6373 original IP address when looking up the host name (a safety check), it
6374 output the message "<ip address> does not match any IP for NULL", which was
6375 confusing, to say the least. The bug was that the host name should have
6376 appeared instead of "NULL".
6378 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6379 user that is built into the binary, and the -C or -D options is used, root
6380 privilege is dropped before the configuration file is read. In addition,
6381 logging is switched to stderr instead of the normal log files. If the
6382 configuration then re-defines the Exim user, the unprivileged environment
6383 is probably not what is expected, so Exim logs a panic warning message (but
6386 However, if deliver_drop_privilege is set, the unprivileged state may well
6387 be exactly what is intended, so the warning has been cut out in that case,
6388 and Exim is allowed to try to write to its normal log files.
6394 1. smtp_return_error_details was not giving details for temporary sender
6395 or receiver verification errors.
6397 2. Diagnose a configuration error if two authenticators have the same public
6400 3. Exim used not to create the message log file for a message until the first
6401 delivery attempt. This could be confusing when incoming messages were held
6402 for policy or load reasons. The message log file is now created at the time
6403 the message is received, and an initial "Received" line is written to it.
6405 4. The automatically generated man page for command line options had a minor
6406 bug that caused no ill effects; however, a more serious problem was that
6407 the procedure for building the man page automatically didn't always
6408 operate. Consequently, release 4.20 contains an out-of-date version. This
6409 shouldn't happen again.
6411 5. When building Exim with embedded Perl support, the script that builds the
6412 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6413 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6415 6. The freeze_tell option was not being used for messages that were frozen on
6416 arrival, either by an ACL or by local_scan().
6418 7. Added the smtp_incomplete_transaction log selector.
6420 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6421 was accepting AUTH without a new EHLO.
6423 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6424 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6427 10. Logging of TCP/IP connections (when configured) now happens in the main
6428 daemon process instead of the child process, so that the TCP/IP connection
6429 count is more accurate (but it can never be perfect).
6431 11. The use of "drop" in a nested ACL was not being handled correctly in the
6432 outer ACL. Now, if condition failure induced by the nested "drop" causes
6433 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6434 or "require"), the connection is dropped.
6436 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6437 that yield "discard" can now be used with an "accept" or a "discard" verb,
6438 but an error is generated for any others (because I can't see a useful way
6439 to define what should happen).
6441 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6442 are now processed in the same way as lines in the Exim configuration file.
6443 In particular, continuation lines are supported.
6445 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6447 15. Added -ti meaning -t -i.
6449 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6450 domains, and warn by logging if others are found.
6452 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6453 returned from GIFCONF when Exim is trying to find the list of interfaces on
6454 a host. The code in os.c has been modified to copy each ifreq to an aligned
6455 structure in all cases.
6457 Also, in some cases, the returned ifreq's were being copied to a 'struct
6458 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6459 means the last couple of bytes of an IPv6 address could be chopped if the
6460 ifreq contained only a normal sockaddr (14 bytes storage).
6462 18. Named domain lists were not supported in the hosts_treat_as_local option.
6463 An entry such as +xxxx was not recognized, and was treated as a literal
6466 19. Ensure that header lines added by a DATA ACL are included in the reject log
6467 if the ACL subsequently rejects the message.
6469 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6470 MD5 (which is deprecated).
6472 21. When testing a filter file using -bf, Exim was writing a message when it
6473 took the sender from a "From " line in the message, but it was not doing so
6474 when it took $return_path from a Return-Path: header line. It now does.
6476 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6477 with a valid header line field name (a series of printing characters
6478 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6480 23. Changed "disc" in the source to "disk" to conform to the documentation and
6481 the book and for uniformity.
6483 24. Ignore Sendmail's -Ooption=value command line item.
6485 25. When execve() failed while trying to run a command in a pipe transport,
6486 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6487 could be confused with a return value of 69 from the command itself. This
6488 has been changed to 127, the value the shell returns if it is asked to run
6489 a non-existent command. The wording for the related log line suggests a
6490 non-existent command as the problem.
6492 26. If received_header_text expands to an empty string, do not add a Received:
6493 header line to the message. (Well, it adds a token one on the spool, but
6494 marks it "old" so that it doesn't get used or transmitted.)
6496 27. Installed eximstats 1.28 (addition of -nt option).
6498 28. There was no check for failure on the call to getsockname() in the daemon
6499 code. This can fail if there is a shortage of resources on the system, with
6500 ENOMEM, for example. A temporary error is now given on failure.
6502 29. Contrary to the C standard, it seems that in some environments, the
6503 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6504 program. Exim now does this explicitly; it affects the formatting of
6505 timestamps using strftime().
6507 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6508 complaints. I've now initialized all the variables, to avoid this.
6510 32. Header lines added by a system filter were not being "seen" during
6511 transport-time rewrites.
6513 33. The info_callback() function passed to OpenSSL is set up with type void
6514 (*)(SSL *, int, int), as described somewhere. However, when calling the
6515 function (actually a macro) that sets it up, the type void(*)() is
6516 expected. I've put in a cast to prevent warnings from picky compilers.
6518 34. If a DNS black list lookup found a CNAME record, but there were no A
6519 records associated with the domain it pointed at, Exim crashed.
6521 35. If a DNS black list lookup returned more than one A record, Exim ignored
6522 all but the first. It now scans all returned addresses if a particular IP
6523 value is being sought. In this situation, the contents of the
6524 $dnslist_value variable are a list of all the addresses, separated by a
6527 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6528 to accept a host name and all its aliases if the forward lookup for any of
6529 them yielded the IP address of the incoming connection. Now it accepts only
6530 those names whose forward lookup yields the correct IP address. Any other
6531 names are discarded. This closes a loophole whereby a rogue DNS
6532 administrator could create reverse DNS records to break through a
6533 wildcarded host restriction in an ACL.
6535 37. If a user filter or a system filter that ran in a subprocess used any of
6536 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6537 the wrong values were passed to the pipe command ($thisaddress had the
6538 value of $0, $0 had the value of $1, etc). This bug was introduced by
6539 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6541 38. Improved the line breaking for long SMTP error messages from ACLs.
6542 Previously, if there was no break point between 40 and 75 characters, Exim
6543 left the rest of the message alone. Two changes have been made: (a) I've
6544 reduced the minimum length to 35 characters; (b) if it can't find a break
6545 point between 35 and 75 characters, it looks ahead and uses the first one
6546 that it finds. This may give the occasional overlong line, but at least the
6547 remaining text gets split now.
6549 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6550 file descriptors might be low, and that setting 1000 would always raise it.
6551 It turns out that in some environments, the limit is already over 1000 and
6552 that lowering it causes trouble. So now Exim takes care not to decrease it.
6554 40. When delivering a message, the value of $return_path is set to $sender_
6555 address at the start of routing (routers may change the value). By an
6556 oversight, this default was not being set up when an address was tested by
6557 -bt or -bv, which affected the outcome if any router or filter referred to
6560 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6561 log only when "message" or "log_message" are set. However, if one of the
6562 conditions was an address verification, or a call to a nested ACL, the
6563 messages generated by the underlying test were being passed through. This
6564 no longer happens. The underlying message is available in $acl_verify_
6565 message for both "message" and "log_message" expansions, so it can be
6566 passed through if needed.
6568 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6569 new expansion $bh_ to give the encoded byte string without charset
6570 translation. Translation happens only if iconv() is available; HAVE_ICONV
6571 indicates this at build time. HEADERS_CHARSET gives the charset to
6572 translate to; headers_charset can change it in the configuration, and
6573 "headers charset" can change it in an individual filter file.
6575 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6576 that creates RFC 2047 encoded "words" labels them as that charset instead
6577 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6578 expansion operator; (ii) when Exim creates a From: line for a local
6579 message; (iii) when a header line is rewritten to include a "phrase" part.
6581 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6582 buggy, causing it to skip the first lines of messages whose message ID
6583 ended in 'D'. This would not have bitten before Exim release 4.14, because
6584 message IDs were unlikely to end in 'D' before then. The effect was to have
6585 incorrect size information for certain domains.
6587 45. #include "config.h" was missing at the start of the crypt16.c module. This
6588 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6591 46. If there was a timeout during a "random" callout check, Exim treated it as
6592 a failure of the random address, and carried on sending RSET and the real
6593 address. If the delay was just some slowness somewhere, the response to the
6594 original RCPT would be taken as a response to RSET and so on, causing
6595 mayhem of various kinds.
6597 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6598 when I implemented it. It didn't allow for the fact that some option values
6599 may legitimately be negative (e.g. size_addition), and it didn't even do
6600 the right test for positive values.
6602 48. Domain names in DNS records are case-independent. Exim always looks them up
6603 in lower case. Some resolvers return domain names in exactly the case they
6604 appear in the zone file, that is, they may contain uppercase letters. Not
6605 all resolvers do this - some return always lower case. Exim was treating a
6606 change of case by a resolver as a change of domain, similar to a widening
6607 of a domain abbreviation. This triggered its re-routing code and so it was
6608 trying to route what was effectively the same domain again. This normally
6609 caused routing to fail (because the router wouldn't handle the domain
6610 twice). Now Exim checks for this case specially, and just changes the
6611 casing of the domain that it ultimately uses when it transmits the message
6614 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6617 50. If a filter generated a file delivery with a non-absolute name (possible if
6618 no home directory exists for the router), the forbid_file option was not
6621 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6622 the existing equality matching.
6624 52. Exim was using ints instead of ino_t variables in some places where it was
6625 dealing with inode numbers.
6627 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6628 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6629 called TMPDIR, and if it finds it is different, it changes its value.
6631 54. The smtp_printf() function is now made available to local_scan() so
6632 additional output lines can be written before returning. There is also an
6633 smtp_fflush() function to enable the detection of a dropped connection.
6634 The variables smtp_input and smtp_batched_input are exported to
6637 55. Changed the default runtime configuration: the message "Unknown user"
6638 has been removed from the ACL, and instead placed on the localuser router,
6639 using the cannot_route_message feature. This means that any verification
6640 failures that generate their own messages won't get overridden. Similarly,
6641 the "Unrouteable address" message that was in the ACL for unverifiable
6642 relay addresses has also been removed.
6644 56. Added hosts_avoid_esmtp to the smtp transport.
6646 57. The exicyclog script was not checking for the esoteric option
6647 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6648 will work only if exicyclog is run under the appropriate euid.
6650 58. Following a discussion on the list, the rules by which Exim recognises line
6651 endings on incoming messages have been changed. The -dropcr and drop_cr
6652 options are now no-ops, retained only for backwards compatibility. The
6653 following line terminators are recognized: LF CRLF CR. However, special
6654 processing applies to CR:
6656 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6657 nor a local message in the state where . is a terminator.
6659 (ii) If a bare CR is encountered in a header line, an extra space is added
6660 after the line terminator so as not to end the header. The reasoning
6661 behind this is that bare CRs in header lines are most likely either
6662 to be mistakes, or people trying to play silly games.
6664 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6665 was being incorrectly given as 18 bytes larger than it should have been.
6666 This is a VOB (very old bug).
6668 60. This may never have affected anything current, but just in case it has:
6669 When the local host is found other than at the start of a list of hosts,
6670 the local host, those with the same MX, and any that follow, are discarded.
6671 When the list in question was part of a longer list of hosts, the following
6672 hosts (not currently being processed) were also being discarded. This no
6673 longer happens. I'm not sure if this situation could ever has previously
6676 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6679 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6680 header. This is something that is recommended in a new Internet Draft, and
6681 is something that is documented as being done by Sendmail. There are two
6682 possible values. For messages generated by the autoreply transport, Exim
6685 Auto-Submitted: auto-replied
6687 whereas for all other generated messages (e.g. bounces) it adds
6689 Auto-Submitted: auto-generated
6691 63. The "personal" condition in filters now includes a test for the
6692 Auto-Submitted: header. If it contains the string "auto-" the message it
6693 not considered personal.
6695 64. Added rcpt_include_affixes as a generic transport option.
6697 65. Added queue_only_override (default true).
6699 66. Added the syslog_duplication option.
6701 67. If what should have been the first header line of a message consisted of
6702 a space followed by a colon, Exim was mis-interpreting it as a header line.
6703 It isn't of course - it is syntactically invalid and should therefore be
6704 treated as the start of the message body. The misbehaviour could have
6705 caused a number of strange effects, including loss of data in subsequent
6706 header lines, and spool format errors.
6708 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6709 client host had authenticated. This control can now be exercised by an ACL
6710 for more flexibility.
6712 69. By default, callouts do not happen when testing with -bh. There is now a
6713 variant, -bhc, which does actually run the callout code, including
6714 consulting and updating the callout cache.
6716 70. Added support for saslauthd authentication, courtesy of Alexander
6719 71. If statvfs() failed on the spool or log directories while checking their
6720 size for availability, Exim confusingly gave the error "space shortage".
6721 Furthermore, in debugging mode it crashed with a floating point exception.
6722 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6723 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6724 serious problem, Exim now writes to the main and panic logs when this
6725 happens, with details of the failure. It then refuses to accept the
6726 incoming message, giving the message "spool directory problem" or "log
6727 directory problem" with a 421 code for SMTP messages.
6729 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6730 0, 1, and 2 exist, because some OS complain for execs without them (see
6731 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6732 descriptors. However, the code omitted to check that the open succeeded,
6733 causing mysterious errors if for some reason the permissions on /dev/null
6734 got screwed. Now Exim writes a message to the main and panic logs, and
6735 bombs out if it can't open /dev/null.
6737 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6738 interact so that it is all more flexible. It is supposed to remain
6739 backwards compatible. Also added extra_local_interfaces.
6741 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6742 to bomb out with an assertion failure - to the client this appears as a
6743 connection drop. This problem occurs in the part of the code that was taken
6744 from the Samba project. Fortunately, the assertion is in a very simple
6745 function, so I have fixed this by reproducing the function inline in the
6746 one place where it is called, and arranging for authentication to fail
6747 instead of killing the process with assert().
6749 75. The SPA client code was not working when the server requested OEM rather
6750 than Unicode encoding.
6752 76. Added code to make require_files with a specific uid setting more usable in
6753 the case where statting the file as root fails - usually a non-root-mounted
6754 NFS file system. When this happens and the failure is EACCES, Exim now
6755 forks a subprocess and does the per-uid checking as the relevant uid.
6757 77. Added process_log_path.
6759 78. If log_file_path was not explicitly set, a setting of check_log_space or
6760 check_log_inodes was ignored.
6762 79. If a space check for the spool or log partitions fails, the incident is now
6763 logged. Of course, in the latter case the data may get lost...
6765 80. Added the %p formatting code to string_format() so that it can be used to
6766 print addresses in debug_print(). Adjusted all the address printing in the
6767 debugging in store.c to use %p rather than %d.
6769 81. There was a concern that a line of code in smtp_in.c could overflow a
6770 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6771 initially expressed, the concern was not well-founded, because trailing
6772 spaces are removed early. However, if the trailing spaces were followed by
6773 a NULL, they did not get removed, so the overflow was possible. Two fixes
6776 (a) I re-wrote the offending code in a cleaner fashion.
6777 (b) If an incoming SMTP command contains a NULL character, it is rejected
6780 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6781 runs initgroups(), so that if the Exim user is in any additional groups,
6782 they will be used during message reception.
6788 The change log for 4.20 and earlier releases has been archived.