1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
8 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
9 SMTP connection" log lines.
11 JH/02 Option default value updates:
12 - queue_fast_ramp (main) true (was false)
13 - remote_max_parallel (main) 4 (was 2)
15 JH/03 Cache static regex pattern compilations, for use by ACLs.
17 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
18 Make the rewrite never match and keep the logging. Trust the
19 admin to be using verify=header-syntax (to actually reject the message).
21 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
22 (under Linux) we watch the dir containing the final file; previously
23 it would be the dir with the first symlink. We still do not monitor
26 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
27 dn_expand() is happy to pass them through.
29 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
30 the file with the proof had an unchanged name, the new proof(s) were
31 loaded on top of the old ones (and nover used; the old ones were stapled).
33 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
34 more than one message arrived in a single connection a reference from
35 the earlier message could be re-used. Often a sigsegv resulted.
36 These variables were introduced in Exim 4.87.
37 Debug help from Graeme Fowler.
43 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
44 after reception to before a subsequent reception. This should
45 mean slightly faster delivery, and also confirmation of reception
48 JH/02 Move from using the pcre library to pcre2. The former is no longer
49 being developed or supported (by the original developer).
51 JH/03 Constification work in the filters module required a major version
52 bump for the local-scan API. Specifically, the "headers_charset"
53 global which is visible via the API is now const and may therefore
54 not be modified by local-scan code.
56 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
57 sendfile() didi not account for the way the ClamAV driver code called it.
59 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
60 time check was being done for every character; replace that with one
63 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
64 sent was prefixed with a length byte.
66 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
67 RFC 5321. Previously Dovecot (at least) would log errors during
70 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
71 in 4.61 without a reason logged. Binaries will be bigger, which might
72 matter on diskspace-constrained systems, but debug is easier.
74 JH/09 Fix macro-definition during "-be" expansion testing. The move to
75 write-protected store for macros had not accounted for these runtime
76 additions; fix by removing this protection for "-be" mode.
78 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
79 handing out large-numbered file descriptors, violating the usual Unix
80 assumption (and required by Posix) that the lowest possible number will be
81 allocated by the kernel when a new one is needed. In the daemon, and any
82 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
83 are not useable for FD_SET() [and hence select()] and overwrite the stack.
84 Assorted crashes happen.
86 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
87 main-section options or in a connect ACL, the value from the first ever
88 connection was never replaced for subsequent connections. Found by
91 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
92 though only once PCRE2 was introduced: the memory accounting used under
93 debug offset allocations by an int, giving a hard trap in early startup.
94 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
96 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
97 with underbars is given. The write-protection of configuration introduced
98 in 4.95 trapped when normalisation was applied to an option not needing
101 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
103 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
104 failing to close the certificates directory, every hour or any time it
107 JH/16 Debugging initiated by an ACL control now continues through into routing
108 and transport processes. Previously debugging stopped any time Exim
109 re-execs, or for processing a queued message.
111 JH/17 The "expand" debug selector now gives more detail, specifically on the
112 result of expansion operators and items.
114 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
115 bad comparison between the option value and the name of the file to
116 be included was done, and a mismatch was wrongly identified.
117 4.88 to 4.95 are affected.
119 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
121 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
122 supplied as the db file-pair basename. Previously, if a directory
123 path was given, for example via the autoreply "once" option, the DB
124 file.pag and file.dir files would be created in that directory's
127 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
128 "taint" log_selector. These were previously deprecated.
130 JH/22 Fix static address-list lookups to properly return the matched item.
131 Previously only the domain part was returned.
133 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
134 the call into OpenSSL to send a TLS Close was being repeated; this
135 resulted in the library waiting for the peer's Close. If that was never
136 sent we waited forever. Fix by tracking send calls.
138 JH/24 The ${run} expansion item now expands its command string elements after
139 splitting. Previously it was before; the new ordering makes handling
140 zero-length arguments simpler. The old ordering can be obtained by
141 appending a new option "preexpand", after a comma, to the "run".
143 JH/25 Taint-check exec arguments for transport-initiated external processes.
144 Previously, tainted values could be used. This affects "pipe", "lmtp" and
145 "queryprogram" transport, transport-filter, and ETRN commands.
146 The ${run} expansion is also affected: in "preexpand" mode no part of
147 the command line may be tainted, in default mode the executable name
150 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
151 the the facility was not passed across execs, and only the first message
152 passed over a connection could use BDAT; any further ones using DATA.
154 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
155 uses $sending_ip_address and an interface is specified.
156 Previously any use of the local address in the EHLO name disabled
157 PIPECONNECT, the common case being to use the rDNS of it.
159 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
160 resumption. Previously verify failed because no certificate status is
161 passed on the wire for the restarted session. Fix by using the recorded
162 ocsp status of the stored session for the new connection.
164 JH/29 TLS resumption: the key for session lookup in the client now includes
165 more info that a server could potentially use in configuring a TLS
166 session, avoiding oferring mismatching sessions to such a server.
167 Previously only the server IP was used.
169 JH/30 Fix string_copyn() for limit greater than actual string length.
170 Previously the copied amount was the limit, which could result in a
171 overlapping memcpy for newly allocated destination soon after a
172 source string shorter than the limit. Found/investigated by KM.
174 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
175 close; it may be needed for a subsequent connection. This caused a
176 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
178 JH/32 Fix CHUNKING for a second message on a connection when the first was
179 rejected. Previously we did not reset the chunking-offered state, and
180 erroneously rejected the BDAT command. Investigation help from
183 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
184 an empty address. Previously the expansion returned an error.
186 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
187 proxy. Previously these were misparsed, leading to paniclog entries.
193 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
194 related applications. Previously an "H" was used where available info
195 says that "M" should be, so change to match.
197 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
198 as arguments, so an implementation trying to copy these into a local
199 buffer was taking a taint-enforcement trap. Fix by using dynamically
200 created buffers. Similar fix for radius expansion condition.
202 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
203 reasonable, eg. to count headers. Fix by using dynamically created
204 buffers rather than a local. Do similar fixes for ACL actions "dcc",
205 "log_reject_target", "malware" and "spam"; the arguments are expanded
206 so could be handling tainted values.
208 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
209 broken the (no-op) support for this sendmail command. Restore it
210 to doing nothing, silently, and returning good status.
212 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
213 record path was given (or the default used) without a leading directory
214 path, an error occurred on trying to open it. Use the transport's working
217 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
218 transport. Previously it was the name on the DNS A-record; use instead
219 the head of the CNAME chain leading there (if there is one). This seems
220 to align better with RFC 6125.
222 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
223 smtp_accept_max_per_host allocated resources which were not released
224 when the limit was exceeded. This eventually crashed the daemon. Fix
225 by adding a release action in that path.
227 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
228 expanded; previously using tainted values was rejected. Fix by using
229 dynamically-created buffers.
231 JH/09 Relax restrictions on ACL verify condition needing access to message
232 headers. Previously they were only permitted in data and non-smtp ACLs;
233 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
234 not_blind, header_sender and header_names_ascii verification.
236 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
237 Previously a macro used one argument twice; when called with the
238 argument as an expression having side-effects, incorrect operation
239 resulted. Use an inlineable function.
241 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
242 held open for a verify callout. Previously this wan not accounted for
243 and a corrupt onward SMTP conversation resulted.
245 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
246 Previously they were embedded naively in the constructed address; when
247 needed, strip the quoting and quote the entire local_part.
248 Also make the inbound_srs expansion condition handle quoting.
250 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
251 excluded, not matching the documentation.
253 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
254 was given for the sqlite_dbfile a trap resulted.
256 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
257 "name" argument resulted in a trap. There is no reason to disallow such;
258 this was a coding error.
260 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
261 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
262 spent suspended, ignoring the POSIX definition. Previously we assumed
263 it did and a constant offset from real time could be used as a correction.
264 Change to using the same clock source for the start-of-message and the
265 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
266 exists, just to get a clock slightly more aligned to reality.
268 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
269 RFC says it is optional some validators care. The missing char was not
270 intended but triggered by a line-wrap alignment. Discovery and fix by
271 Guillaume Outters, hacked on by JH.
273 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
274 name being quoted was tainted a trap would be taken. Fix by using
275 dynamically created buffers. The routine could have been called by a
276 rewrite with the "h" flag, by using the "-F" command-line option, or
277 by using a "name=" option on a control=submission ACL modifier.
279 JH/19 SPF: change the Authentication-Results expansion component to give
280 smtp.helo when the sender domain is empty. Previously it gave
283 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
284 not in 127.0.0.0/8 to help in spotting list domains taken over by a
285 domain-parking registrar.
287 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
288 Previously when a whitespace character was specified it was not inserted
289 after removing the newline.
291 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
292 the domain part of the recipient address. This overrides any tls_sni
293 option set, which was previously used.
295 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
298 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
299 is_tainted() had an off-by-one error in the overenthusiastic direction.
300 Find and fix by Gavan. Although NetBSD is not a supported platform for
301 4.94 this bug could affect other platforms.
303 PP/01 Fix default prime selection to be consistent.
304 One path used ike23 still, instead of exim.dev.20160529.3; now both
305 execution flows will use the same DH primes (currently
306 exim.dev.20160529.3).
308 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
309 option in smtp transport, to match the documentation. Previously
310 verification was not being done in some cases where it should have been.
312 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
313 than one server was defined and depending on the platform memory layout
314 details, an internal consistency trap could be hit while walking the list
317 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
318 files. The value is used by the authresults expansion item. Previously
319 if this was used in a router or transport, a crash could result.
321 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
322 have a sufficient incidence of EINTR returns from select that an
323 interaction with other operations done by the main daemon loop exposed
324 a bug in the error-handling. This was benign apart from the log
327 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
328 for consistency with delivered "=>" and failed "**" lines. While we're
329 there, handle PRX and TFO.
331 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
332 applied. This resulted, if any header-line rewrite rules were configured,
333 in a panic-log triggerable by sending a message with a long address in
334 a header. Fix by increasing the arbitrary limit to larger than a single
335 (dewrapped) 5322 header line maximum size.
337 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
338 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
339 RFC 6648 which deprecates X- options in protocols as a general practice.
340 Changeover between the implementations is handled by the mechanisms
343 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
344 a remote which uses callout/hold. Previously the local was queued.
346 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
349 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
350 log line. The asterisk is now consistently appended to the remote IP
351 (and port, if given), and will also be provided on defer and fail log
352 lines. Previously it could be placed on the local IP if that was being
353 logged, and was only provided on delivery lines.
355 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
357 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
358 authenticator client_send option. Previously the next char, after a pair
359 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
360 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
361 documentation. There is still no way to get a leading ^ immediately
362 after a NUL (ie. for the password of a PLAIN method authenticator.
364 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
365 files. For bad sizes read, delete the record and whine to paniclog.
367 JH/38 When logging an AUTH failure, as server, do not include sensitive
368 information. Previously, the credentials would be included if given
369 as part of the AUTH command line and an ACL denied authentication.
371 JH/39 Bug 2691: fix $local_part_data. When the matching list element
372 referred to a file, bad data was returned. This likely also affected
375 JH/40 The gsasl authenticator now supports caching of the salted password
376 generated by the client-side implementation. This required the addition
377 of a new variable: $auth4.
379 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
380 left undeleted; the attempt to re-create it then failed - resulting in
381 the usual "SIGHUP tp have daemon reload configuration" to not work.
382 This affected any platform not supporting "abstract" Unix-domain
383 sockets (i.e. not Linux).
385 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
386 recipients" response to RCPT in a later response, with a 250. The
387 previous coding assumed this would not happen, and under PIPELINING
388 would result in both lost and duplicate recipients for a message.
390 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
391 Previously the weighting was incorrectly applied. Similar fix for socks
392 proxies. Found and fixed by Heiko Schlichting.
394 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
395 not handle sub-lists included using the +namedlist syntax. While
396 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
397 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
400 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
401 Previously the permanent pool was used, so the sore could not be freed.
402 This meant a connection with many messages would use continually-growing
405 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
406 per-pool so as not to waste too much space. Previously a constant size
407 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
408 DOS attacks harder. The cost is wasted memory use in the larger blocks.
410 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
411 same space repeatedly, and a smaller process footprint.
413 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
414 for GnuTLS. Previously the name started "%s" which, while not a bug,
415 looked as if if might be one.
417 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
418 "continued connection") make the $proxy_* variables available. Previously
419 the information was not passed across the exec() call for subsequent
420 transport executions. This also mean that the log lines for the
421 messages can show the proxy information.
423 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
424 receive time. With modern systems the difference is significant.
425 The historical behaviour can be restored by disabling (a new) log_selector
426 "queue_time_exclusive".
428 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
429 content) were specifically tested for. Now, also cover expansions
430 resulting in ACL names and inline ACL content.
432 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
433 making it unusable in complex expressions.
435 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
436 fail with a taint-check on the spoolfile name, and leave the message
439 HS/01 Enforce absolute PID file path name.
441 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
443 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
445 PP/02 Bug 2643: Correct TLS DH constants.
446 A missing NUL termination in our code-generation tool had led to some
447 incorrect Diffie-Hellman constants in the Exim source.
448 Reported by kylon94, code-gen tool fix by Simon Arlott.
450 PP/03 Impose security length checks on various command-line options.
451 Fixes CVE-2020-SPRSS reported by Qualys.
453 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
454 better. Reported by Qualys.
456 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
457 providing a particularly obnoxious sender full name.
460 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
462 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
465 PP/08 Change default for recipients_max from unlimited to 50,000.
467 PP/09 Fix security issue with too many recipients on a message (to remove a
468 known security problem if someone does set recipients_max to unlimited,
469 or if local additions add to the recipient list).
470 Fixes CVE-2020-RCPTL reported by Qualys.
472 PP/10 Fix security issue in SMTP verb option parsing
473 Fixes CVE-2020-EXOPT reported by Qualys.
475 PP/11 Fix security issue in BDAT state confusion.
476 Ensure we reset known-good where we know we need to not be reading BDAT
477 data, as a general case fix, and move the places where we switch to BDAT
478 mode until after various protocol state checks.
479 Fixes CVE-2020-BDATA reported by Qualys.
481 HS/03 Die on "/../" in msglog file names
483 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
484 the Exim runtime user are allowed to create files.
486 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
489 QS/03 When reading the output from interpreted forward files we do not
490 pass the pipe between the parent and the interpreting process to
491 executed child processes (if any).
493 QS/04 Always die if requested from internal logging, even is logging is
496 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
497 the API; compilation noo longer completes with DMARC support included.
498 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
499 been reported on other platforms.
501 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
503 JH/56 Make the majority of info read from config files readonly, for defence-in-
504 depth against exploits. Suggestion by Qualys.
505 Not supported on Solaris 10.
507 JH/57 Fix control=fakreject for a custom message containing tainted data.
508 Previously this resulted in a log complaint, due to a re-expansion present
509 since fakereject was originally introduced.
511 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
512 modifier was given, a loop resulted.
514 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
515 pipelined SMTP command followed the BDAT LAST then it would be
516 incorrectly treated as part of the message body, causing a verification
519 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
520 require looser validation rules than those for 821-level addresses,
521 which only permit IP addresses.
527 JH/01 Avoid costly startup code when not strictly needed. This reduces time
528 for some exim process initialisations. It does mean that the logging
529 of TLS configuration problems is only done for the daemon startup.
531 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
533 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
534 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
537 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
538 DKIM signing is being done. Previously a transport_filter would always
539 disable CHUNKING, falling back to traditional DATA.
541 JH/05 Regard command-line recipients as tainted.
543 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
545 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
546 PAM library frees one of the arguments given to it, despite the
547 documentation. Therefore a plain malloc must be used.
549 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
550 on-stack buffers were used, resulting in a taint trap when DSN information
551 copied from a received message was written into the buffer.
553 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
554 the ordering of its ARC headers. This caused a crash.
556 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
557 a new record was being constructed with information from the peer, a trap
560 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
561 installation would get error messages from DMARC verify, when it hit the
562 nonexistent file indicated by the default. Distros wanting DMARC enabled
563 should both provide the file and set the option.
564 Also enforce no DMARC verification for command-line sourced messages.
566 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
567 could, depending on the platform, hang at the STARTTLS response.
569 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
570 message on a connection. Previously if one message had ARC headers and
571 the following one did not, a crash could result when adding an
572 Authentication-Results: header.
574 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
575 Exim main code and Exim-related utities. The introduction of taint
576 tracking also did many adjustments to string handling. Since then, eximon
577 frequently terminated with an assert failure.
579 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
580 check for 452 responses. This slightly helps the inefficieny of doing
581 a large alias-expansion into a recipient-limited target. The max_rcpt
582 transport option still applies (and at the current default, will override
583 the new feature). The check is done for either cause of synch, and forces
584 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
585 connection. The new facility is not tunable at this time.
587 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
588 library live data was being used, so the results became garbage. Make
589 copies while it is still usable.
591 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
592 on delivery deferred (==) and failed (**) lines (if a delivery was
593 attemtped). Previously it was only on completion (=>) lines.
595 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
596 for the expansion of the server_scram_iter and server_scram_salt options.
598 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
599 are now specifically given a NO_DATA response without hitting the system
600 resolver. The library goes on to do the now-standard TXT lookup.
601 Use of dnsdb lookups is not affected.
603 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
604 only retrieve the errormessage once. Previously two calls to dlerror()
605 were used, and the second one (for mainlog/paniclog) retrieved null
608 JH/20 Taint checking: disallow use of tainted data for
609 - the appendfile transport file and directory options
610 - the pipe transport command
611 - the autoreply transport file, log and once options
612 - file names used by the redirect router (including filter files)
614 - paths used by single-key lookups
615 Previously this was permitted.
617 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
618 adjusted the size of a major service buffer; this failed because the
619 buffer was in use at the time. Change to a compile-time increase in the
620 buffer size, when this authenticator is compiled into exim.
622 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
623 previous fast-mode was untenable in the face of glibs using mmap to
624 support larger malloc requests.
626 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
627 New values supported, if defined on system where compiled:
628 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
629 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
631 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
632 running a limited number of proceses in parallel, a benefit is gained. The
633 amount varies with the platform hardware and load. The use of the option
634 queue_run_in_order means we cannot do this, as ordering becomes
637 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
638 had introduced a string-copy (for ensuring NUL-termination) which was not
639 appropriate for that case, which can include embedded NUL bytes in the
640 block of data. Investigation showed the copy to actually be needless, the
641 data being length-specified.
643 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
644 done during a receiving connection, and both used TLS, global info was
645 used rather than per-connection info for tracking the state of data
646 queued for transmission. This could result in a connection hang.
648 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
649 Previously, when delivering serveral messages down a single connection
650 only the first would provide a SIZE. This was due to the size information
651 not being properly tracked.
653 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
654 TAI (at 37 seconds currently), pretend to be in UTC for time-related
655 expansion and logging. Previously, spurious values such as a future
656 minute could be seen.
658 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
659 it could crash from a null-deref. This could also affect the
660 ${addresses: } operator and ${readsock } item.
662 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
663 message following a mime one, the variable was not reset.
665 JH/30 When an pipelined-connect fails at the first response, assume incorrect
666 cached capability (perhaps the peer reneged?) and immediately retry in
669 JH/31 Fix spurious detection of timeout while writing to transport filter.
671 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
672 an attempt to copy the string was made before checking it.
674 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
675 taint of the lookup key was maintained; we now regard the presence in the
676 filesystem as sufficient validation.
678 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
679 argument is supplied.
681 JH/35 The dsearch lookup now requires that the directory is an absolute path.
682 Previously this was not checked, and nonempty relative paths made an
683 access under Exim's current working directory.
685 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
686 Previously no event was raised.
688 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
689 parameter supplied by the sender MAIL FROM command. Previously it was
690 ignored, and only the check_spool_space option value for the required
693 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
694 the size of the signing public-key. Previously it was instead giving
695 the size of the signature hash.
697 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
698 the default. See the (new) dkim_verify_min_keysizes option.
700 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
701 and an ACL use a lookup for checking either the local_part or domain,
702 stale data could be accessed. Ensure that variable references are
703 dropped between messages.
705 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
706 by the client was not checked as pointing within response data before
707 being used. A malicious client could thus cause an out-of-bounds read and
708 possibly gain authentication. Fix by adding the check.
710 JH/42 Internationalisation: change the default for downconversion in the smtp
711 transport to be "if needed". Previously it was "as previously set" for
712 the message, which usually meant "if needed" for message-submission but
713 "no" for everything else. However, MTAs have been seen using SMTPUTF8
714 even when the envelope addresses did not need it, resulting in forwarding
715 failures to non-supporting MTAs. A downconvert in such cases will be
716 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
717 transport. The change does mean that addresses needing conversion will
718 be converted when previously a delivery failure would occur.
720 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
721 response was received it would be used unchecked in a fail-DSN, violating
722 standards on line-length limits. Truncate if needed.
724 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
725 doesn't work. (Additionally add a new main config option to configure the
732 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
733 side, to decode a TLS 1.3 packet capture.
735 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
736 Previously the default library behaviour applied, sending two, each in
739 JH/03 Debug output for ACL now gives the config file name and line number for
742 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
744 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
746 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
747 buffer overrun for (non-chunking) other transports.
749 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
750 TLS1.3, means that a server rejecting a client certificate is not visible
751 to the client until the first read of encrypted data (typically the
752 response to EHLO). Add detection for that case and treat it as a failed
753 TLS connection attempt, so that the normal retry-in-clear can work (if
754 suitably configured).
756 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
757 and/or domain. Found and fixed by Jason Betts.
759 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
760 configuration). If a CNAME target was not a wellformed name pattern, a
763 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
764 the OS reports them interleaved with other addresses.
766 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
767 used both for input and for a verify callout, both encrypted, SMTP
768 responses being sent by the server could be lost. This resulted in
769 dropped connections and sometimes bounces generated by a peer sending
772 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
773 string. Previously it was possible to cause undefined behaviour in a
774 library routine (usually a crash). Found by "zerons".
776 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
779 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
780 API was removed, so update to use the newer ones.
782 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
783 any timeout set, is taking a long time. Previously we would hang on to a
784 rotated logfile "forever" if the input was arriving with long gaps
785 (a previous attempt to fix addressed lack, for a long time, of initial
788 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
789 shared (NFS) environment. The length of the tempfile name is now
790 4 + 16 ("hdr.$message_exim_id") which might break on file
791 systems which restrict the file name length to lower values.
794 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
795 shared (NFS) environment.
797 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
798 did for all versions <4.90). Notably -M, -m, --invert, -I may be
801 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
802 on some platforms for bit 31.
804 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
805 to changes apparently associated with TLS1.3 handling some of the APIs
806 previously used were either nonfunctional or inappropriate. Strings
807 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
808 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
809 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
810 This affects log line X= elements, the $tls_{in,out}_cipher variables,
811 and the use of specific cipher names in the encrypted= ACL condition.
813 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
815 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
816 verification result was not updated unless hosts_require_ocsp applied.
818 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
819 queue_list_requires_admin set to false, non-admin users were denied the
822 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
823 directory-of-certs mode. Previously they were advertised despite the
826 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
827 A single TCP connection by a client will now hold a TLS connection open
828 for multiple message deliveries, by default. Previously the default was to
831 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
832 default. If built with the facility, DANE will be used. The facility
833 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
835 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
836 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
837 must be defined and you must still, unless you define DISABLE_TLS, manage
838 the the include-dir and library-file requirements that go with that
839 choice. Non-TLS builds are still supported.
841 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
844 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
845 default. If the platform supports and has the facility enabled, it will
846 be requested on all coneections.
848 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
849 controlled by the build-time option SUPPORT_PIPE_CONNECT.
851 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
853 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
854 success-DSN messages. Previously the From: header was always the default
855 one for these; the option was ignored.
857 JH/28 Fix the timeout on smtp response to apply to the whole response.
858 Previously it was reset for every read, so a teergrubing peer sending
859 single bytes within the time limit could extend the connection for a
860 long time. Credit to Qualsys Security Advisory Team for the discovery.
862 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
863 delivery address, which leaked information of the results of local
864 forwarding. Change to the original envelope recipient address, per
867 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
868 requested. Previously not bounce was generated and a log entry of
869 error ignored was made.
871 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
873 JH/32 Introduce a general tainting mechanism for values read from the input
874 channel, and values derived from them. Refuse to expand any tainted
875 values, to catch one form of exploit.
877 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
878 was unused and the unexpanded text used for the test. Found and
879 fixed by Ruben Jenster.
881 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
882 an attempt to use a TLS library read routine dereffed a nul pointer,
885 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
886 them in our smtp response.
888 JH/36 Have the general router option retry_use_local_part default to true when
889 any of the restrictive preconditions are set (to anything). Previously it
890 was only for check_local user. The change removes one item of manual
891 configuration which is required for proper retries when a remote router
892 handles a subset of addresses for a domain.
894 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
895 link count into consideration.
897 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
898 caused the extension of big_buffer, the following lines were ignored.
900 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
901 accordance with RFC 2308. Previously there was no expiry, so a longlived
902 receive process (eg. due to ACL delays) versus a short SOA value could
905 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
907 JH/39 Promote DMARC support to mainline.
909 JH/40 Bug 2452: Add a References: header to DSNs.
911 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
912 parameters. The relevant library call is documented as "Deprecated: This
913 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
914 3.6.0, DH parameters are negotiated following RFC7919."
916 HS/06 Change the default of dnssec_request_domains to "*"
918 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
919 carried on and emitted a BDAT command, even when PIPELINING was not
922 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
923 buffer was used for the filename, resulting in a trap when tainted
924 arguments (eg. $domain) were used.
926 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
927 recommended to avoid a possible server-load attack. The feature can be
928 re-enabled via the openssl_options main cofiguration option.
930 JH/45 local_scan API: documented the current smtp_printf() call. This changed
931 for version 4.90 - adding a "more data" boolean to the arguments.
932 Bumped the ABI version number also, this having been missed previously;
933 release versions 4.90 to 4.92.3 inclusive were effectively broken in
934 respect of usage of smtp_printf() by either local_scan code or libraries
935 accessed via the ${dlfunc } expansion item. Both will need coding
936 adjustment for any calls to smtp_printf() to match the new function
937 signature; a FALSE value for the new argument is always safe.
939 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
940 the file-offset (which the Linux syscall does, and exim expects); this
941 resulted in an indefinite loop.
943 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
944 to do ARC verification. The Authentication-Results: header line added
945 by the configuration then had no ARC item.
947 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
948 an incorrect mode was used for reading the result, resulting in it being
955 JH/01 Remove code calling the customisable local_scan function, unless a new
956 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
958 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
959 non-signal-safe functions being used.
961 JH/03 Bug 2269: When presented with a received message having a stupidly large
962 number of DKIM-Signature headers, disable DKIM verification to avoid
963 a resource-consumption attack. The limit is set at twenty.
965 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
966 report of oldest_pass in ${authres } in consequence, and separate out
967 some descriptions of reasons for verification fail.
969 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
970 files in the spool were present and unlocked. A queue-runner could spot
971 them, resulting in a duplicate delivery. Fix that by doing the unlock
972 after the unlink. Investigation by Tim Stewart. Take the opportunity to
973 add more error-checking on spoolfile handling while that code is being
976 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
977 No known attacks, no CVE, this is defensive hardening.
979 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
980 a queue-runner could start a delivery while other operations were ongoing.
981 Cutthrough delivery was a common victim, resulting in duplicate delivery.
982 Found and investigated by Tim Stewart. Fix by using the open message data
983 file handle rather than opening another, and not locally closing it (which
984 releases a lock) for that case, while creating the temporary .eml format
985 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
987 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
988 $sender_verify_failure/$recipient_verify_failure to "random".
990 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
993 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
994 Previously this would segfault.
996 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
999 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1000 like zero, since the resolver should be doing this for us, But we need one
1001 as a CNAME but no MX presence gets the CNAME returned; we need to check
1002 that doesn't point to an MX to declare it "no MX returned" rather than
1003 "error, loop". A new main option is added so the older capability of
1004 following some limited number of chain links is maintained.
1006 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1008 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1009 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1010 now-deprecated earlier definitions used only specified the range up to TLS
1011 1.2 (in the older-version library docs).
1013 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1015 JH/15 Rework TLS client-side context management. Stop using a global, and
1016 explicitly pass a context around. This enables future use of TLS for
1017 connections to service-daemons (eg. malware scanning) while a client smtp
1018 connection is using TLS; with cutthrough connections this is quite likely.
1020 JH/16 Fix ARC verification to do AS checks in reverse order.
1022 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1024 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1025 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1026 Previously the "utf8" would be re-prepended for every additional message.
1028 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1029 Previously thery were accepted, resulting in issues when attempting to
1030 forward messages to a non-supporting MTA.
1032 PP/02 Let -n work with printing macros too, not just options.
1034 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1035 one parent address was copied, and bogus data was used at delivery-logging
1036 time. Either a crash (after delivery) or bogus log data could result.
1037 Discovery and analysis by Tim Stewart.
1039 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1040 Previously if the string ended mid-character, we did not insert the
1041 promised '?' replacement.
1043 PP/04 Documentation: current string operators work on bytes, not codepoints.
1045 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1046 should pack well giving a smaller memory footprint so better caching and
1047 therefore performance. Group the declarations where this can't be done so
1048 that the byte-sized flag variables are not interspersed among pointer
1049 variables, giving a better chance of good packing by the compiler.
1051 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1052 non-null, to avoid issues with sites running BATV. Previously reports were
1053 sent with an empty envelope sender so looked like bounces.
1055 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1056 The ignore_error flag wasn't being returned from the filter subprocess so
1057 was not set for later routers. Investigation and fix by Matthias Kurz.
1059 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1060 and a msg:complete for the whole, when a message is manually removed using
1061 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1063 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1064 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1065 hope that is portable enough.
1067 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1068 requiring a known-CA anchor certificate; make it now rely entirely on the
1069 TLSA as an anchor. Checking the name on the leaf cert against the name
1070 on the A-record for the host is still done for TA (but not for EE mode).
1072 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1073 included in delivery lines for non-proxied connections, when compiled with
1074 SUPPORT_SOCKS and running with proxy logging enabled.
1076 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1077 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1078 move the existing event to fire before the normal logging of message
1079 failure so that custom logging is bracketed by normal logging.
1081 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1082 msg:fail:internal event. Developement by Matthias Kurz.
1084 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1085 far too small for todays use of crypto signatures stored there. Go all
1086 the way to the max DNS message size of 64kB, even though this might be
1087 overmuch for IOT constrained device use.
1089 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1090 copy a string over itself. The library routine is documented as not
1091 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1093 JH/32 For main options check_spool_space and check_inode_space, where the
1094 platform supports 64b integers, support more than the previous 2^31 kB
1095 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1096 the previous G, M, k.
1098 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1099 $authenticated_fail_id variable on authentication failure. Previously
1102 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1103 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1104 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1105 GNUTLS_SEC_PARAM_MEDIUM.
1107 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1108 side. Previously we would continue as if no SNI had been received.
1110 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1111 "<" character, which should be a list-separator specification, we walked
1112 off past the nul-terimation.
1114 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1115 causes) even when the retry time is not yet met. Previously they were
1116 not, meaning that when (say) an account was over-quota and temp-rejecting,
1117 and multiple senders' messages were queued, only one sender would get
1118 notified on each configured delay_warning cycle.
1120 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1122 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1123 cipher-suites, an error can be left on the stack even for a succeeding
1124 accept; this results in impossible error messages when a later operation
1127 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1128 return error codes indicating retry. Under TLS1.3 this becomes required.
1130 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1131 it only wrote the new authenticators, resulting in a lack of tracking of
1132 peer changes of ESMTP extensions until the next cache flush.
1134 JH/41 Fix the loop reading a message header line to check for integer overflow,
1135 and more-often against header_maxsize. Previously a crafted message could
1136 induce a crash of the recive process; now the message is cleanly rejected.
1138 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1139 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1145 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1146 When redis_servers is set to a list of > 1 element, and the Redis servers
1147 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1148 case of MOVED into a DEFER case instead, thus moving the query onto the
1149 next server in the list. For a cluster of N elements, all N servers must
1150 be defined in redis_servers.
1152 GF/02 Catch and remove uninitialized value warning in exiqsumm
1153 Check for existence of @ARGV before looking at $ARGV[0]
1155 JH/01 Replace the store_release() internal interface with store_newblock(),
1156 which internalises the check required to safely use the old one, plus
1157 the allocate and data copy operations duplicated in both (!) of the
1158 extant use locations.
1160 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1161 modifier. This matches the restriction on the commandline.
1163 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1164 Previously only the last row was returned.
1166 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1167 we assumed that tags in the header were well-formed, and parsed the
1168 element content after inspecting only the first char of the tag.
1169 Assumptions at that stage could crash the receive process on malformed
1172 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1173 While running the DKIM ACL we operate on the Permanent memory pool so that
1174 variables created with "set" persist to the DATA ACL. Also (at any time)
1175 DNS lookups that fail create cache records using the Permanent pool. But
1176 expansions release any allocations made on the current pool - so a dnsdb
1177 lookup expansion done in the DKIM ACL releases the memory used for the
1178 DNS negative-cache, and bad things result. Solution is to switch to the
1179 Main pool for expansions.
1180 While we're in that code, add checks on the DNS cache during store_reset,
1181 active in the testsuite.
1182 Problem spotted, and debugging aided, by Wolfgang Breyha.
1184 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1185 When none of the hosts presented to a transport match an already-open
1186 connection, close it and proceed with the list. Previously we would
1187 queue the message. Spotted by Lena with Yahoo, probably involving
1190 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1191 Previously a spurious "250 OK id=" response was appended to the proper
1194 JH/08 The "support for" informational output now, which built with Content
1195 Scanning support, has a line for the malware scanner interfaces compiled
1196 in. Interface can be individually included or not at build time.
1198 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1199 by the template makefile "src/EDITME". The "STREAM" support for an older
1200 ClamAV interface method is removed.
1202 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1203 rows affected is given instead).
1205 JH/11 The runtime Berkeley DB library version is now additionally output by
1206 "exim -d -bV". Previously only the compile-time version was shown.
1208 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1209 SMTP connection. Previously, when one had more recipients than the
1210 first, an abortive onward connection was made. Move to full support for
1211 multiple onward connections in sequence, handling cutthrough connection
1212 for all multi-message initiating connections.
1214 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1215 routers. Previously, a multi-recipient message would fail to match the
1216 onward-connection opened for the first recipient, and cause its closure.
1218 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1219 a timeout on read on a GnuTLS initiating connection, resulting in the
1220 initiating connection being dropped. This mattered most when the callout
1221 was marked defer_ok. Fix to keep the two timeout-detection methods
1224 JH/15 Relax results from ACL control request to enable cutthrough, in
1225 unsupported situations, from error to silently (except under debug)
1226 ignoring. This covers use with PRDR, frozen messages, queue-only and
1229 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1231 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1232 metadata, resulting in a crash in free().
1234 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1235 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1236 Broken also in d185889f4, with init system revamp.
1238 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1239 Previously we abruptly closed the connection after reading a malware-
1240 found indication; now we go on to read the "scan ok" response line,
1243 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1244 ACL. Previously, a crash would result.
1246 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1247 macro text after a replacement (previously it was only once per line) and
1248 by skipping builtin macros when searching for an uppercase lead character.
1250 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1251 for the build is renamed.
1253 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1254 was allocated for every new TLS startup, meaning one per message. Fix
1255 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1257 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1258 reported the original. Fix to report (as far as possible) the ACL
1259 result replacing the original.
1261 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1262 OpenSSL. Certificate information is loaded for every new TLS startup,
1263 and the resources needed to be freed.
1265 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1267 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1270 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1271 DATA response info to the (existing) per-recipient response info for
1272 the "C=" log element. It can have useful tracking info from the
1273 destination system. Patch from Simon Arlott.
1275 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1276 length value. Previously this would segfault.
1278 HS/02 Support Avast multiline protoocol, this allows passing flags to
1279 newer versions of the scanner.
1281 JH/28 Ensure that variables possibly set during message acceptance are marked
1282 dead before release of memory in the daemon loop. This stops complaints
1283 about them when the debug_store option is enabled. Discovered specifically
1284 for sender_rate_period, but applies to a whole set of variables.
1285 Do the same for the queue-runner and queue-list loops, for variables set
1286 from spool message files. Do the same for the SMTP per-message loop, for
1287 certain variables indirectly set in ACL operations.
1289 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1290 as a multi-recipient message from a mailinglist manager). The coding had
1291 an arbitrary cutoff number of characters while checking for more input;
1292 enforced by writing a NUL into the buffer. This corrupted long / fast
1293 input. The problem was exposed more widely when more pipelineing of SMTP
1294 responses was introduced, and one Exim system was feeding another.
1295 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1296 receiving system, and refused recipients seen by the sending system
1297 (propating to people being dropped from mailing lists).
1298 Discovered and pinpointed by David Carter.
1300 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1301 replaced by the ${authresults } expansion.
1303 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1305 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1306 allows proper process termination in container environments.
1308 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1309 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1311 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1312 and "err_perm", deprecated since 4.83 when the RFC-defined words
1313 "temperror" and "permerror" were introduced.
1315 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1316 transport-filters or DKIM-signing. The restriction was lost in the
1317 consolidation of verify-callout and delivery SMTP handling.
1318 Extend the restriction to also cover ARC-signing.
1320 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1321 in defer=pass mode supply a 450 to the initiator. Previously the message
1324 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1325 tls_require_ciphers is used as before.
1327 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1328 "pass_unscanned". Only tmpfails from the scanner are written to
1329 the paniclog, as they may require admin intervention (permission
1330 denied, license issues). Other scanner errors (like decompression
1331 bombs) do not cause a paniclog entry.
1333 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1334 Previously it was possible to log spurious information in receive log
1337 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1338 triggered odd behaviour from Outlook Express clients.
1340 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1343 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1344 since the IETF WG has not yet settled on that versus the original
1345 "bare" representation.
1347 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1348 Previously the millisecond value corrupted the output.
1349 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1350 corrupted the output.
1356 JH/01 Rework error string handling in TLS interface so that the caller in
1357 more cases is responsible for logging. This permits library-sourced
1358 string to be attached to addresses during delivery, and collapses
1359 pairs of long lines into single ones.
1361 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1362 during configuration. Wildcards are allowed and expanded.
1364 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1365 This permits better logging.
1367 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1368 do not close it down and have the child transport start it up again on
1369 the passed-on TCP connection. Instead, proxy the child (and any
1370 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1371 affected: the continued delivery log lines do not have any DNSSEC, TLS
1372 Certificate or OCSP information. TLS cipher information is still logged.
1374 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1375 identical IP addresses on different listening ports. Will also affect
1378 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1379 add noisy ifdef guards to special-case this sillyness.
1380 Patch from Bernd Kuhls.
1382 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1383 than 255 are no longer allowed.
1385 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1386 Disable the session-cache too, which might reduce our load. Since we
1387 currrectly use a new context for every connection, both as server and
1388 client, there is no benefit for these.
1389 GnuTLS appears to not support tickets server-side by default (we don't
1390 call gnutls_session_ticket_enable_server()) but client side is enabled
1391 by default on recent versions (3.1.3 +) unless the PFS priority string
1394 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1395 <https://reproducible-builds.org/specs/source-date-epoch/>.
1397 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1398 the check for any unsuccessful recipients did not notice the limit, and
1399 erroneously found still-pending ones.
1401 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1402 MSG_MORE. Only in-clear (not on TLS connections).
1404 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1405 transport-filter is involved we can buffer the headers in memory for
1406 creating the signature, and read the spool data file once for the
1407 signature and again for transmission.
1409 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1410 4.77 as the kernel support then wasn't solid, having issues in 64bit
1411 mode. Now, it's been long enough. Add support for FreeBSD also.
1413 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1414 case where the routing stage had gathered several addresses to send to
1415 a host before calling the transport for the first, we previously failed
1416 to close down TLS in the old transport process before passing the TCP
1417 connection to the new process. The new one sent a STARTTLS command
1418 which naturally failed, giving a failed delivery and bloating the retry
1419 database. Investigation and fix prototype from Wolfgang Breyha.
1421 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1422 false-negatives in the check that the sender had not preempted a response
1423 or prompt from Exim (running as a server), due to that code's lack of
1424 awareness of the SMTP input buffering.
1426 PP/04 Add commandline_checks_require_admin option.
1427 Exim drops privileges sanely, various checks such as -be aren't a
1428 security problem, as long as you trust local users with access to their
1429 own account. When invoked by services which pass untrusted data to
1430 Exim, this might be an issue. Set this option in main configuration
1431 AND make fixes to the calling application, such as using `--` to stop
1434 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1435 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1436 responses to those, into a single TLS record each way (this usually means
1437 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1440 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1441 affects you only if you're dancing at the edge of the param size limits.
1442 If you are, and this message makes sense to you, then: raise the
1443 configured limit or use OpenSSL 1.1. Nothing we can do for older
1446 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1447 cmdline element to get the documented default one. Previously it was
1450 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1451 are unsuable for non-message-specific reasons - eg. connection timeout,
1452 banner-time rejection.
1454 JH/16 Fix logging of delivery remote port, when specified by router, under
1457 PP/06 Repair manualroute's ability to take options in any order, even if one
1458 is the name of a transport.
1461 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1463 JH/17 Change the list-building routines interface to use the expanding-string
1464 triplet model, for better allocation and copying behaviour.
1466 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1467 Previously it was constructed the first time a possibly-matching string
1468 was met in the configuration file input during startup; now it is done
1471 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1472 compatible one, to avoid the (poorly documented) possibility of a config
1473 file in the working directory redirecting the DB files, possibly correpting
1474 some existing file. CVE-2017-10140 assigned for BDB.
1476 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1477 cache-hot. Previously, although the result was properly cached, the
1478 initial verify call returned a defer.
1480 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1481 the main verify for receipient in uncached-mode.
1483 JH/22 Retire historical build files to an "unsupported" subdir. These are
1484 defined as "ones for which we have no current evidence of testing".
1486 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1487 if present. Previously it was ignored.
1489 JH/24 Start using specified-initialisers in C structure init coding. This is
1490 a C99 feature (it's 2017, so now considered safe).
1492 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1493 if was a fixed-sized field and bitmask ops via macros; it is now more
1496 PP/07 GitHub PR 56: Apply MariaDB build fix.
1497 Patch provided by Jaroslav Škarvada.
1499 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1500 during Coverity cleanups [4.87 JH/47]
1501 Diagnosis and fix provided by Michael Fischer v. Mollard.
1503 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1504 the right size to place the terminating semicolon on its own folded
1505 line, the header hash was calculated to an incorrect value thanks to
1506 the (relaxed) space the fold became.
1508 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1509 and confused the parent.
1511 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1512 which could crash as a result. This could lead to undeliverable messages.
1514 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1517 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1518 matters on fast-turnover and PID-randomising systems, which were getting
1519 out-of-order delivery.
1521 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1522 a possibly-overlapping copy. The symptom was that "Remote host closed
1523 connection in response to HELO" was logged instead of the actual 4xx
1526 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1527 Previously only that bufferd was discarded, resulting in SYMTP command
1530 JH/32 DKIM: when a message has multiple signatures matching an identity given
1531 in dkim_verify_signers, run the dkim acl once for each. Previously only
1532 one run was done. Bug 2189.
1534 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1535 "panic the current process" to "deliberately defer". The panic log is
1536 still written with the problem list name; the mail and reject logs now
1537 get a temp-reject line for the message that was being handled, saying
1538 something like "domains check lookup or other defer". The SMTP 451
1539 message is still "Temporary local problem".
1541 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1542 A crafted sequence of BDAT commands could result in in-use memory beeing
1543 freed. CVE-2017-16943.
1545 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1546 from SMTP input. Previously it was always done; now only done for DATA
1547 and not BDAT commands. CVE-2017-16944.
1549 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1550 to the message (such as an overlong header line). Previously this was
1551 not done and we did not exit BDAT mode. Followon from the previous item
1552 though a different problem.
1558 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1559 than -2003 did; needs libidn2 in addition to libidn.
1561 JH/02 The path option on a pipe transport is now expanded before use.
1563 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1564 Patch provided by "Björn", documentation fix added too.
1566 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1567 missing a wire-to-host endian conversion.
1569 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1570 close after a BDAT command line could be taken as a following command,
1571 giving a synch failure. Fix by only checking for synch immediately
1572 before acknowledging the chunk.
1574 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1575 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1576 macro. Patches provided by Josh Soref.
1578 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1579 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1580 by IANA as a service extension. However, John Klensin suggests that we
1583 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1584 the dkim code may be unix-mode line endings rather than smtp wire-format
1585 CRLF, so prepend a CR to any bare LF.
1587 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1588 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1590 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1591 the first were themselves being wrongly included in the feed into dkim
1592 processing; with most chunk sizes in use this resulted in an incorrect
1593 body hash calculated value.
1595 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1596 DKIM signature block, for verification. Although advised against by
1597 standards it is specifically not ruled illegal.
1599 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1601 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1602 missing a body hash (the bh= tag).
1604 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1605 It seems that HAProxy sends the Proxy Protocol information in clear and
1606 only then does a TLS startup, so do the same.
1608 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1609 TCP connections (such as for Spamd) unless the daemon successfully set
1610 Fast Open mode on its listening sockets. This fixes breakage seen on
1611 too-old kernels or those not configured for Fast Open, at the cost of
1612 requiring both directions being enabled for TFO, and TFO never being used
1613 by non-daemon-related Exim processes.
1615 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1616 endings, at least on the first header line. Try to canonify any that get
1617 past that check, despite the cost.
1619 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1620 now limited to an arbitrary five deep, while parsing addresses with the
1621 strip_excess_angle_brackets option enabled.
1623 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1624 instead leave the unprompted TLS handshake in socket buffer for the
1625 TLS library to consume.
1627 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1629 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1631 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1632 region in one operation, for speed, and this leaves assigned pointers
1633 dangling. Add checks run only under the testsuite which checks all
1634 variables at a store-reset and panics on a dangling pointer; add code
1635 explicitly nulling out all the variables discovered. Fixes one known
1636 bug: a transport crash, where a dangling pointer for $sending_ip_address
1637 originally assigned in a verify callout, is re-used.
1639 PP/06 Drop '.' from @INC in various Perl scripts.
1641 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1643 PP/08 Reduce a number of compilation warnings under clang; building with
1644 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1645 should be warning-free.
1647 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1649 HS/01 Fix portability problems introduced by PP/08 for platforms where
1650 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1652 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1653 chunk. This allows us to accept broken chunked messages. We need a more
1654 general solution here.
1656 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1657 already-broken messages in the queue.
1659 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1661 JH/19 Fix reference counting bug in routing-generated-address tracking.
1667 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1668 supports it and a size is available (ie. the sending peer gave us one).
1670 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1671 years of being deprecated). The replacements are the ACLs
1672 acl_smtp_mime and acl_not_smtp_mime.
1674 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1675 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1676 or even an in-clear connection were permitted. Now, if the host lookup
1677 was dnssec and dane was requested then the host is only used if the
1678 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1679 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1680 if one fails this test.
1681 This means that a poorly-configured remote DNS will make it incommunicado;
1682 but it protects against a DNS-interception attack on it.
1684 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1685 non-noisy when a race steals the message being considered.
1687 JH/05 If main configuration option tls_certificate is unset, generate a
1688 self-signed certificate for inbound TLS connections.
1690 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1691 in rewrites and routers.
1693 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1694 and logged a warning sing 4.83; now they are a configuration file error.
1696 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1697 (lacking @domain). Apply the same qualification processing as RCPT.
1699 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1701 JH/10 Support ${sha256:} applied to a string (as well as the previous
1704 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1705 a cutthrough deliver is pending, as we always want to make a connection.
1706 This also avoids re-routing the message when later placing the cutthrough
1707 connection after a verify cache hit.
1708 Do not update it with the verify result either.
1710 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1711 when routing results in more than one destination address.
1713 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1714 signing (which inhibits the cutthrough capability). Previously only
1715 the presence of an option was tested; now an expansion evaluating as
1716 empty is permissible (obviously it should depend only on data available
1717 when the cutthrough connection is made).
1719 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1720 the relevant preceding SMTP command did not note the pipelining mode.
1722 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1723 Previously they were not counted.
1725 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1726 as one having no matching records. Previously we deferred the message
1727 that needed the lookup.
1729 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1730 distinguished as "(=".
1732 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1733 for missing MX records. Previously it only worked for missing A records.
1735 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1737 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1738 after the data-go-ahead and data-ack. Patch from Jason Betts.
1740 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1741 even for a "none" policy. Patch from Tony Meyer.
1743 JH/22 Fix continued use of a connection for further deliveries. If a port was
1744 specified by a router, it must also match for the delivery to be
1747 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1748 When one of the recipients of a message was unsuitable for the connection
1749 (has no matching addresses), we lost track of needing to mark it
1750 deferred. As a result mail would be lost.
1752 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1754 JH/25 Decoding ACL controls is now done using a binary search; the source code
1755 takes up less space and should be simpler to maintain. Merge the ACL
1756 condition decode tables also, with similar effect.
1758 JH/26 Fix problem with one_time used on a redirect router which returned the
1759 parent address unchanged. A retry would see the parent address marked as
1760 delivered, so not attempt the (identical) child. As a result mail would
1763 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1764 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1765 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1768 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1769 Main config options check_{log,spool}_{inodes,space} are now
1770 100 inodes, 10MB unless set otherwise in the configuration.
1772 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1773 Previously it only applied to the main-section connection policy
1776 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1778 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1779 by me. Added RFC7919 DH primes as an alternative.
1781 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1782 are not in the system include path.
1784 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1785 GnuTLS, when a session startup failed (eg because the client disconnected)
1786 Exim did stdio operations after fclose. This was exposed by a recent
1787 change which nulled out the file handle after the fclose.
1789 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1790 signed directly by the cert-signing cert, rather than an intermediate
1791 OCSP-signing cert. This is the model used by LetsEncrypt.
1793 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1795 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1796 an incoming connection.
1798 HS/02 Bug 1802: Do not half-close the connection after sending a request
1801 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1802 fallback to "prime256v1".
1804 JH/34 SECURITY: Use proper copy of DATA command in error message.
1805 Could leak key material. Remotely exploitable. CVE-2016-9963.
1811 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1812 and 3.4.4 - once the server is enabled to respond to an OCSP request
1813 it does even when not requested, resulting in a stapling non-aware
1814 client dropping the TLS connection.
1816 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1817 support variable-length bit vectors. No functional change.
1819 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1820 The I= interface field on outgoing lines is now after the H= remote
1821 host field, same as incoming lines. There is a separate
1822 outgoing_interface log selector which allows you to disable the
1825 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1826 If not running log_selector +smtp_connection the mainlog would be held
1827 open indefinitely after a "too many connections" event, including to a
1828 deleted file after a log rotate. Leave the per net connection logging
1829 leaving it open for efficiency as that will be quickly detected by the
1830 check on the next write.
1832 HS/01 Bug 1671: Fix post transport crash.
1833 Processing the wait-<transport> messages could crash the delivery
1834 process if the message IDs didn't exist for some reason. When
1835 using 'split_spool_directory=yes' the construction of the spool
1836 file name failed already, exposing the same netto behaviour.
1838 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1839 mime_regex ACL conditions.
1841 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1842 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1843 to HELO, local diagnostic string.
1845 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1846 log line to debug. Even when configured with a tls authenticator many
1847 client connections are expected to not authenticate in this way, so
1848 an authenticate fail is not an error.
1850 HS/02 Add the Exim version string to the process info. This way exiwhat
1851 gives some more detail about the running daemon.
1853 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1854 matter for fast-change records such as DNSBLs.
1856 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1857 retry record, even if constant. There may be multiple transports with
1858 different interface settings and the retry behaviour needs to be kept
1861 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1863 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1865 JH/10 Bug 840: fix log_defer_output option of pipe transport
1867 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1868 hosts_randomize. This matters a lot when combined with mua_wrapper.
1870 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1871 ${quote_pgsql:<string>} operator.
1873 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1875 JH/14 Change header file name for freeradius-client. Relevant if compiling
1876 with Radius support; from the Gentoo tree and checked under Fedora.
1878 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1880 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1881 option transport_filter, meaning no filtering.
1883 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1885 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1886 defaults to "*" (all hosts). The variable is now available when not built
1887 with TLS, default unset, mainly to enable keeping the testsuite sane.
1888 If a server certificate is not supplied (via tls_certificate) an error is
1889 logged, and clients will find TLS connections fail on startup. Presumably
1890 they will retry in-clear.
1891 Packagers of Exim are strongly encouraged to create a server certificate
1892 at installation time.
1894 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1895 with the $config_file variable.
1897 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1898 in transport context, after the attempt, and per-recipient. The latter type
1899 is per host attempted. The event data is the error message, and the errno
1900 information encodes the lookup type (A vs. MX) used for the (first) host,
1901 and the trailing two digits of the smtp 4xx response.
1903 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1904 to write to mainlog (or rejectlog, paniclog) in the window between file
1905 creation and permissions/ownership being changed. Particularly affects
1906 installations where exicyclog is run as root, rather than exim user;
1907 result is that the running daemon panics and dies.
1909 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1911 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1912 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1913 "pri" and "weight". Note that the previous implicit priority given by the
1914 list order is no longer honoured.
1916 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1917 for DKIM processing.
1919 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1920 by defining SUPPORT_SOCKS.
1922 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1923 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1924 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1925 variables are renamed to proxy_{local,external}_{address,port}.
1927 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1928 for a build by defining SUPPORT_I18N
1930 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1931 of the query string, and make ${quote_redis:} do that quoting.
1933 JH/29 Move Events support from Experimental to mainline, enabled by default
1934 and removable for a build by defining DISABLE_EVENT.
1936 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1938 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1939 cached by the daemon.
1941 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1942 by defining LOOKUP_REDIS. The libhiredis library is required.
1944 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1945 keys are given for lookup.
1947 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1948 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1949 only supported when built with TLS support. The PolarSSL SHA routines
1950 are still used when the TLS library is too old for convenient support.
1952 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1953 openssl_options), for security. OpenSSL forces this from version 1.1.0
1954 server-side so match that on older versions.
1956 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1957 allocation for $value could be released as the expansion processing
1958 concluded, but leaving the global pointer active for it.
1960 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1961 and to use the domains and local_parts ACL conditions.
1963 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1964 incorrectly not doubled on cutthrough transmission, hence seen as a
1965 body-termination at the receiving system - resulting in truncated mails.
1966 Commonly the sender saw a TCP-level error, and retransmitted the message
1967 via the normal store-and-forward channel. This could result in duplicates
1968 received - but deduplicating mailstores were liable to retain only the
1969 initial truncated version.
1971 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1973 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1975 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1976 we're in there, support oversigning also; bug 1309.
1978 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1980 HS/04 Add support for keep_environment and add_environment options.
1982 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1983 either intentional arithmetic overflow during PRNG, or testing config-
1986 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1987 delivery resulted in actual delivery. Cancel cutthrough before DATA
1990 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1991 rejects a recipient: pass the reject to the originator.
1993 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1994 Many were false-positives and ignorable, but it's worth fixing the
1997 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1998 for the new environment-manipulation done at startup. Move the routines
1999 from being local to tls.c to being global via the os.c file.
2001 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2002 an extract embedded as result-arg for a map, the first arg for extract
2003 is unavailable so we cannot tell if this is a numbered or keyed
2004 extraction. Accept either.
2010 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2013 JH/02 The smtp transport option "multi_domain" is now expanded.
2015 JH/03 The smtp transport now requests PRDR by default, if the server offers
2018 JH/04 Certificate name checking on server certificates, when exim is a client,
2019 is now done by default. The transport option tls_verify_cert_hostnames
2020 can be used to disable this per-host. The build option
2021 EXPERIMENTAL_CERTNAMES is withdrawn.
2023 JH/05 The value of the tls_verify_certificates smtp transport and main options
2024 default to the word "system" to access the system default CA bundle.
2025 For GnuTLS, only version 3.0.20 or later.
2027 JH/06 Verification of the server certificate for a TLS connection is now tried
2028 (but not required) by default. The verification status is now logged by
2029 default, for both outbound TLS and client-certificate supplying inbound
2032 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2035 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2036 Status Notification (bounce) messages are now MIME format per RFC 3464.
2037 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2038 under the control of the dsn_advertise_hosts option, and routers may
2039 have a dsn_lasthop option.
2041 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2042 default, modifiable by a malware= option. The list separator for
2043 the options can now be changed in the usual way. Bug 68.
2045 JH/10 The smtp_receive_timeout main option is now expanded before use.
2047 JH/11 The incoming_interface log option now also enables logging of the
2048 local interface on delivery outgoing connections.
2050 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2051 if the interface and destination host and port all match.
2053 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2056 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2057 Patch from Andrew Lewis.
2059 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2060 now supports optional time-restrictions, weighting, and priority
2061 modifiers per server. Patch originally by <rommer@active.by>.
2063 JH/16 The spamd_address main option now supports a mixed list of local
2064 and remote servers. Remote servers can be IPv6 addresses, and
2065 specify a port-range.
2067 JH/17 Bug 68: The spamd_address main option now supports an optional
2068 timeout value per server.
2070 JH/18 Bug 1581: Router and transport options headers_add/remove can
2071 now have the list separator specified.
2073 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2076 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2079 JH/21 Support for the A6 type of dns record is withdrawn.
2081 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2082 rather than the verbs used.
2084 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2085 from 255 to 1024 chars.
2087 JH/24 Verification callouts now attempt to use TLS by default.
2089 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2090 are generic router options now. The defaults didn't change.
2092 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2093 Original patch from Alexander Shikoff, worked over by JH.
2095 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2096 files if ZCAT_COMMAND is not executable.
2098 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2100 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2102 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2103 Normally benign, it bites when the pair was led to by a CNAME;
2104 modern usage is to not canonicalize the domain to a CNAME target
2105 (and we were inconsistent anyway for A-only vs AAAA+A).
2107 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2109 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2110 when evaluating $sender_host_dnssec.
2112 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2113 $sender_helo_dnssec variable.
2115 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2117 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2119 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2121 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2122 documented as working, but never had. Support all but $spam_report.
2124 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2125 added for tls authenticator.
2127 HS/03 Add perl_taintmode main config option
2133 TL/01 When running the test suite, the README says that variables such as
2134 no_msglog_check are global and can be placed anywhere in a specific
2135 test's script, however it was observed that placement needed to be near
2136 the beginning for it to behave that way. Changed the runtest perl
2137 script to read through the entire script once to detect and set these
2138 variables, reset to the beginning of the script, and then run through
2139 the script parsing/test process like normal.
2141 TL/02 The BSD's have an arc4random API. One of the functions to induce
2142 adding randomness was arc4random_stir(), but it has been removed in
2143 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2144 function when detected.
2146 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2147 cause callback expansion.
2149 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2150 syntax errors in an expansion can be treated as a string instead of
2151 logging or causing an error, due to the internal use of bool_lax
2152 instead of bool when processing it.
2154 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2155 server certificates when making smtp deliveries.
2157 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2159 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2161 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2163 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2164 Merged patch from Sebastian Wiedenroth.
2166 JH/05 Fix results-pipe from transport process. Several recipients, combined
2167 with certificate use, exposed issues where response data items split
2168 over buffer boundaries were not parsed properly. This eventually
2169 resulted in duplicates being sent. This issue only became common enough
2170 to notice due to the introduction of connection certificate information,
2171 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2173 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2174 size buffer was used, resulting in syntax errors when an expansion
2177 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2178 version 3.3.6 or later.
2180 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2181 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2182 both become "event_action", the variables become $event_name, $event_data
2183 and $event_defer_errno. There is a new variable $verify_mode, usable in
2184 routers, transports and related events. The tls:cert event is now also
2185 raised for inbound connections, if the main configuration event_action
2188 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2189 early OCSP support, but no stapling (appears to be less than 1.0.0).
2191 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2192 server certificate names available under the smtp transport option
2193 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2196 JH/10 Time-related extraction expansions from certificates now use the main
2197 option "timezone" setting for output formatting, and are consistent
2198 between OpenSSL and GnuTLS compilations. Bug 1541.
2200 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2201 encoded parameter in the incoming message. Bug 1558.
2203 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2204 include certificate info, eximon was claiming there were spoolfile
2207 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2209 JH/14 Log delivery-related information more consistently, using the sequence
2210 "H=<name> [<ip>]" wherever possible.
2212 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2213 are problematic for Debian distribution, omit them from the release
2216 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2218 JH/16 Fix string representation of time values on 64bit time_t architectures.
2221 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2222 output list separator was used.
2227 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2228 checkers that were complaining about end of non-void function with no
2231 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2232 This was a regression introduced in 4.83 by another bugfix.
2234 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2236 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2237 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2243 TF/01 Correctly close the server side of TLS when forking for delivery.
2245 When a message was received over SMTP with TLS, Exim failed to clear up
2246 the incoming connection properly after forking off the child process to
2247 deliver the message. In some situations the subsequent outgoing
2248 delivery connection happened to have the same fd number as the incoming
2249 connection previously had. Exim would try to use TLS and fail, logging
2250 a "Bad file descriptor" error.
2252 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2253 utilities have not been installed.
2255 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2256 temporary space as the ACL may create new global variables.
2258 TL/01 LDAP support uses per connection or global context settings, depending
2259 upon the detected version of the libraries at build time.
2261 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2262 to extract and use the src ip:port in logging and expansions as if it
2263 were a direct connection from the outside internet. PPv2 support was
2264 updated based on HAProxy spec change in May 2014.
2266 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2268 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2269 Properly escape header and check for NULL return.
2271 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2274 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2276 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2277 characters in header names, implemented as a verify condition.
2278 Contributed by Michael Fischer v. Mollard.
2280 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2281 results permerror and temperror. Previous values are deprecated but
2282 still accepted. In a future release, err_perm and err_temp will be
2283 completely removed, which will be a backward incompatibility if the
2284 ACL tests for either of these two old results. Patch contributed by
2285 user bes-internal on the mailing list.
2287 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2289 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2290 selectors, in both main and reject logs.
2292 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2295 JH/07 Add malware type "sock" for talking to simple daemon.
2297 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2299 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2300 routers/transports under cutthrough routing.
2302 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2303 numbers. Touch up "bool" conditional to keep the same definition.
2305 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2307 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2309 JH/12 Expand items in router/transport headers_add or headers_remove lists
2310 individually rather than the list as a whole. Bug 1452.
2312 Required for reasonable handling of multiple headers_ options when
2313 they may be empty; requires that headers_remove items with embedded
2314 colons must have them doubled (or the list-separator changed).
2316 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2317 view the policy declared in the DMARC record. Currently, $dmarc_status
2318 is a combined value of both the record presence and the result of the
2321 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2323 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2324 dnslookup router and the smtp transport (applying to the forward
2327 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2328 of ldap servers used for a specific lookup. Patch provided by Heiko
2331 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2332 New variable $lookup_dnssec_authenticated for observability.
2334 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2335 Patch submitted by Lars Timman.
2337 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2339 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2340 Requires trusted mode and valid format message id, aborts otherwise.
2341 Patch contributed by Heiko Schlichting.
2343 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2344 certextract with support for various fields. Bug 1358.
2346 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2347 is requested by default, modifiable by smtp transport option
2350 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2351 operate on certificate variables to give certificate fingerprints
2352 Also new ${sha256:cert_variable}.
2354 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2356 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2357 Christian Aistleitner.
2359 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2361 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2362 file. Patch from Wolfgang Breyha.
2364 JH/25 Expand the coverage of the delivery $host and $host_address to
2365 client authenticators run in verify callout. Bug 1476.
2367 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2368 align with daemon_smtp_ports. Bug 72.
2370 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2371 support and error reporting did not work properly.
2373 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2374 and is readable. Patch from Andrew Colin Kissa.
2376 TL/14 Enhance documentation of ${run expansion and how it parses the
2377 commandline after expansion, particularly in the case when an
2378 unquoted variable expansion results in an empty value.
2380 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2382 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2383 by renaming away from it. Addresses GH issue 15, reported by
2386 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2388 TL/15 SECURITY: prevent double expansion in math comparison functions
2389 (can expand unsanitized data). Not remotely exploitable.
2396 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2398 PP/02 Make -n do something, by making it not do something.
2399 When combined with -bP, the name of an option is not output.
2401 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2404 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2405 $sender_host_name and config options to manage this, and basic check
2408 PP/05 DSCP support for outbound connections and control modifier for inbound.
2410 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2411 (Only plugin which currently uses this is kerberos4, which nobody should
2412 be using, but we should make it available and other future plugins might
2413 conceivably use it, even though it would break NAT; stuff *should* be
2414 using channel bindings instead).
2416 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2417 name; added for Sendmail compatibility; requires admin caller.
2418 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2419 just ignore it); requires trusted caller.
2420 Also parse but ignore: -Ac -Am -X<logfile>
2423 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2425 TL/02 Add +smtp_confirmation as a default logging option.
2427 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2428 Patch by Magnus Holmgren from 2007-02-20.
2430 TL/04 Bugzilla 1281 - Spec typo.
2431 Bugzilla 1283 - Spec typo.
2432 Bugzilla 1290 - Spec grammar fixes.
2434 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2436 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2438 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2439 mailing list by by Dmitry Isaikin.
2441 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2443 JH/02 Support "G" suffix to numbers in ${if comparisons.
2445 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2447 NM/01 Bugzilla 1197 - Spec typo
2448 Bugzilla 1196 - Spec examples corrections
2450 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2452 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2453 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2456 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2457 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2459 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2460 "acl {{name}{arg}...}", and optional args on acl condition
2463 JH/05 Permit multiple router/transport headers_add/remove lines.
2465 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2467 JH/07 Avoid using a waiting database for a single-message-only transport.
2468 Performance patch from Paul Fisher. Bugzilla 1262.
2470 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2473 JH/09 Add $headers_added variable, with content from use of ACL modifier
2474 add_header (but not yet added to the message). Bugzilla 199.
2476 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2477 Pulled from Bugzilla 817 by Wolfgang Breyha.
2479 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2481 (nb: this is the same fix as in Exim 4.80.1)
2483 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2486 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2489 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2491 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2492 advertise SMTP AUTH mechanism to us, instead of a generic
2493 protocol violation error. Also, make Exim more robust to bad
2494 data from the Dovecot auth socket.
2496 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2498 When a queue runner is handling a message, Exim first routes the
2499 recipient addresses, during which it prunes them based on the retry
2500 hints database. After that it attempts to deliver the message to
2501 any remaining recipients. It then updates the hints database using
2504 So if a recipient address works intermittently, it can get repeatedly
2505 deferred at routing time. The retry hints record remains fresh so the
2506 address never reaches the final cutoff time.
2508 This is a fairly common occurrence when a user is bumping up against
2509 their storage quota. Exim had some logic in its local delivery code
2510 to deal with this. However it did not apply to per-recipient defers
2511 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2513 This change adds a proper retry rule check during routing so that the
2514 final cutoff time is checked against the message's age. We only do
2515 this check if there is an address retry record and there is not a
2516 domain retry record; this implies that previous attempts to handle
2517 the address had the retry_use_local_parts option turned on. We use
2518 this as an approximation for the destination being like a local
2519 delivery, as in LMTP.
2521 I suspect this new check makes the old local delivery cutoff check
2522 redundant, but I have not verified this so I left the code in place.
2524 TF/02 Correct gecos expansion when From: is a prefix of the username.
2526 Test 0254 submits a message to Exim with the header
2530 When I ran the test suite under the user fanf2, Exim expanded
2531 the header to contain my full name, whereas it should have added
2532 a Resent-Sender: header. It erroneously treats any prefix of the
2533 username as equal to the username.
2535 This change corrects that bug.
2537 GF/01 DCC debug and logging tidyup
2538 Error conditions log to paniclog rather than rejectlog.
2539 Debug lines prefixed by "DCC: " to remove any ambiguity.
2541 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2543 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2544 Bug spotted by Jeremy Harris; was flawed since initial commit.
2545 Would have resulted in OCSP responses post-SNI triggering an Exim
2546 NULL dereference and crash.
2548 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2550 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2551 Bug detection, analysis and fix by Samuel Thibault.
2552 Bugzilla 1331, Debian bug #698092.
2554 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2556 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2557 Server implementation by Todd Lyons, client by JH.
2558 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2559 config variable "prdr_enable" controls whether the server
2560 advertises the facility. If the client requests PRDR a new
2561 acl_data_smtp_prdr ACL is called once for each recipient, after
2562 the body content is received and before the acl_smtp_data ACL.
2563 The client is controlled by both of: a hosts_try_prdr option
2564 on the smtp transport, and the server advertisement.
2565 Default client logging of deliveries and rejections involving
2566 PRDR are flagged with the string "PRDR".
2568 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2569 fclose(). Diagnosis by Todd Lyons.
2571 PP/17 Update configure.default to handle IPv6 localhost better.
2572 Patch by Alain Williams (plus minor tweaks).
2575 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2576 This is now consistent with GnuTLS, and is now documented: the
2577 previous undocumented portable approach to treating the option as
2578 unset was to force an expansion failure. That still works, and
2579 an empty string is now equivalent.
2581 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2582 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2583 not performing validation itself.
2585 PP/20 Added force_command boolean option to pipe transport.
2586 Patch from Nick Koston, of cPanel Inc.
2588 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2591 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2593 PP/21 Fix eximon continuous updating with timestamped log-files.
2594 Broken in a format-string cleanup in 4.80, missed when I repaired the
2595 other false fix of the same issue.
2596 Report and fix from Heiko Schlichting.
2599 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2600 Report from Prashanth Katuri.
2602 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2603 It's SecureTransport, so affects any MacOS clients which use the
2604 system-integrated TLS libraries, including email clients.
2606 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2607 using a MIME ACL for non-SMTP local injection.
2608 Report and assistance in diagnosis by Warren Baker.
2610 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2612 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2614 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2615 last id that failed so it may be referenced in subsequent ACL's.
2617 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2620 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2621 ldap library initialization, allowing self-signed CA's to be
2622 used. Also properly sets require_cert option later in code by
2623 using NULL (global ldap config) instead of ldap handle (per
2624 session). Bug diagnosis and testing by alxgomz.
2626 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2627 the src/util/ subdirectory.
2629 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2630 renamed to Transport Post Delivery Action by Jeremy Harris, as
2633 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2634 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2635 redis_servers = needs to be configured which will be used by the redis
2636 lookup. Patch from Warren Baker, of The Packet Hub.
2638 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2640 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2641 hostname or reverse DNS when processing a host list. Used suggestions
2642 from multiple comments on this bug.
2644 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2646 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2647 Missed a few lines, added it to make the runtest require no keyboard
2650 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2651 contains upper case chars. Make router use caseful_local_part.
2653 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2654 support when GnuTLS has been built with p11-kit.
2660 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2662 This, or similar/improved, will also be change PP/11 of 4.82.
2668 PP/01 Handle short writes when writing local log-files.
2669 In practice, only affects FreeBSD (8 onwards).
2670 Bugzilla 1053, with thanks to Dmitry Isaikin.
2672 NM/01 Bugzilla 949 - Documentation tweak
2674 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2677 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2679 PP/02 Implemented gsasl authenticator.
2681 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2683 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2684 `pkg-config foo` for cflags/libs.
2686 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2687 with rest of GSASL and with heimdal_gssapi.
2689 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2690 `pkg-config foo` for cflags/libs for the TLS implementation.
2692 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2693 properties get this fed in as external SSF. A number of robustness
2694 and debugging improvements to the cyrus_sasl authenticator.
2696 PP/08 cyrus_sasl server now expands the server_realm option.
2698 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2699 Patch by Jeremy Harris.
2701 PP/10 Added dbmjz lookup type.
2703 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2705 PP/12 MAIL args handles TAB as well as SP, for better interop with
2706 non-compliant senders.
2707 Analysis and variant patch by Todd Lyons.
2709 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2710 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2711 Patch from Dirk Mueller <dmueller@suse.com>
2713 PP/13 tls_peerdn now print-escaped for spool files.
2714 Observed some $tls_peerdn in wild which contained \n, which resulted
2715 in spool file corruption.
2717 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2718 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2719 or write after TLS renegotiation, which otherwise led to messages
2722 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2723 as a tracking header (ie: a signed header comes before the signature).
2724 Patch from Wolfgang Breyha.
2726 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2727 comma-sep list; embedded commas doubled.
2729 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2731 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2733 Report and patch from Dmitry Banschikov.
2735 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2736 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2737 failures. We appear to now support TLS1.1+ with Exim.
2739 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2740 lets Exim select keys and certificates based upon TLS SNI from client.
2741 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2742 before an outbound SMTP session. New log_selector, +tls_sni.
2744 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2745 NULL dereference. Report and patch from Alun Jones.
2747 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2748 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2749 Not seeing resolver debug output on NetBSD, but suspect this is a
2750 resolver implementation change.
2752 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2753 Left warnings. Added "eximon gdb" invocation mode.
2755 PP/21 Defaulting "accept_8bitmime" to true, not false.
2757 PP/22 Added -bw for inetd wait mode support.
2759 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2760 locate the relevant includes and libraries. Made this the default.
2762 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2763 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2765 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2766 This may cause build issues on older platforms.
2768 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2769 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2770 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2771 Added SNI support via GnuTLS too.
2772 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2774 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2776 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2777 Applied second patch from Janne, implementing suggestion to default
2778 multiple-strings-in-record handling to match SPF spec.
2780 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2782 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2783 read-only, out of scope).
2784 Patch from Wolfgang Breyha, report from Stuart Northfield.
2786 PP/29 Fix three issues highlighted by clang analyser static analysis.
2787 Only crash-plausible issue would require the Cambridge-specific
2788 iplookup router and a misconfiguration.
2789 Report from Marcin Mirosław.
2791 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2793 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2794 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2795 As part of this, removing so much warning spew let me fix some minor
2796 real issues in debug logging.
2798 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2799 assignment on my part. Fixed.
2801 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2802 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2803 Janne Snabb (who went above and beyond: thank you).
2805 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2806 string otherwise requires a connection and a bunch more work and it's
2807 relatively easy to get wrong. Should also expose TLS library linkage
2810 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2811 64-bit ${eval} (JH/03).
2813 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2814 GNU libc to support some of the 64-bit stuff, should not lead to
2815 conflicts. Defined before os.h is pulled in, so if a given platform
2816 needs to override this, it can.
2818 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2819 protection layer was required, which is not implemented.
2820 Bugzilla 1254, patch from Wolfgang Breyha.
2822 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2823 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2824 tls_dhparam take prime identifiers. Also unbreak combination of
2825 OpenSSL+DH_params+TLSSNI.
2827 PP/39 Disable SSLv2 by default in OpenSSL support.
2833 PP/01 Solaris build fix for Oracle's LDAP libraries.
2834 Bugzilla 1109, patch from Stephen Usher.
2836 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2838 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2841 TF/02 Fix a couple more cases where we did not log the error message
2842 when unlink() failed. See also change 4.74-TF/03.
2844 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2845 lock up or crash if it happened to be inside a call to libc when it
2846 got a SIGUSR1 from exiwhat.
2848 The SIGUSR1 handler appends the current process status to the process
2849 log which is later printed by exiwhat. It used to use the general
2850 purpose logging code to do this, but several functions it calls are
2851 not safe for signals.
2853 The new output code in the SIGUSR1 handler is specific to the process
2854 log, and simple enough that it's easy to inspect for signal safety.
2855 Removing some special cases also simplifies the general logging code.
2856 Removing the spurious timestamps from the process log simplifies
2859 TF/04 Improved ratelimit ACL condition.
2861 The /noupdate option has been deprecated in favour of /readonly which
2862 has clearer semantics. The /leaky, /strict, and /readonly update modes
2863 are mutually exclusive. The update mode is no longer included in the
2864 database key; it just determines when the database is updated. (This
2865 means that when you upgrade Exim will forget old rate measurements.)
2867 Exim now checks that the per_* options are used with an update mode that
2868 makes sense for the current ACL. For example, when Exim is processing a
2869 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2870 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2871 must specify per_mail/readonly. If you omit the update mode it defaults to
2872 /leaky where that makes sense (as before) or /readonly where required.
2874 The /noupdate option is now undocumented but still supported for
2875 backwards compatibility. It is equivalent to /readonly except that in
2876 ACLs where /readonly is required you may specify /leaky/noupdate or
2877 /strict/noupdate which are treated the same as /readonly.
2879 A useful new feature is the /count= option. This is a generalization
2880 of the per_byte option, so that you can measure the throughput of other
2881 aggregate values. For example, the per_byte option is now equivalent
2882 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2884 The per_rcpt option has been generalized using the /count= mechanism
2885 (though it's more complicated than the per_byte equivalence). When it is
2886 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2887 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2888 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2889 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2890 Note that using per_rcpt with a non-readonly update mode in more than
2891 one ACL will cause the recipients to be double-counted. (The per_mail
2892 and per_byte options don't have this problem.)
2894 The handling of very low rates has changed slightly. If the computed rate
2895 is less than the event's count (usually one) then this event is the first
2896 after a long gap. In this case the rate is set to the same as this event's
2897 count, so that the first message of a spam run is counted properly.
2899 The major new feature is a mechanism for counting the rate of unique
2900 events. The new per_addr option counts the number of different
2901 recipients that someone has sent messages to in the last time period. It
2902 behaves like per_rcpt if all the recipient addresses are different, but
2903 duplicate recipient addresses do not increase the measured rate. Like
2904 the /count= option this is a general mechanism, so the per_addr option
2905 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2906 example, measure the rate that a client uses different sender addresses
2907 with the options per_mail/unique=$sender_address. There are further
2908 details in the main documentation.
2910 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2912 TF/06 Removed a few PCRE remnants.
2914 TF/07 Automatically extract Exim's version number from tags in the git
2915 repository when doing development or release builds.
2917 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2918 Bugzilla 879. Patch from Paul Fisher.
2920 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2921 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2924 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2926 PP/05 Variable $av_failed, true if the AV scanner deferred.
2927 Bugzilla 1078. Patch from John Horne.
2929 PP/06 Stop make process more reliably on build failure.
2930 Bugzilla 1087. Patch from Heiko Schlittermann.
2932 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2933 Bugzilla 1089. Patch from Heiko Schlittermann.
2935 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2936 Bugzilla 1131. Patch from Holger Weiß.
2938 PP/09 Handle IPv6 addresses with SPF.
2939 Bugzilla 860. Patch from Wolfgang Breyha.
2941 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2943 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2946 PP/11 match_* no longer expand right-hand-side by default.
2947 New compile-time build option, EXPAND_LISTMATCH_RHS.
2948 New expansion conditions, "inlist", "inlisti".
2950 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2952 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2954 PP/14 fix log_write() format string regression from TF/03.
2955 Bugzilla 1152. Patch from Dmitry Isaikin.
2961 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2963 PP/02 Harmonised TLS library version reporting; only show if debugging.
2964 Layout now matches that introduced for other libraries in 4.74 PP/03.
2966 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2968 PP/04 New "dns_use_edns0" global option.
2970 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2973 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2974 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2976 TK/01 Updated PolarSSL code to 0.14.2.
2977 Bugzilla 1097. Patch from Andreas Metzler.
2979 PP/07 Catch divide-by-zero in ${eval:...}.
2980 Fixes bugzilla 1102.
2982 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2985 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2986 format-string attack -- SECURITY: remote arbitrary code execution.
2988 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2989 time unintentionally subject to list matching rules, letting the header
2990 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2991 arbitrary string expansion). This allowed for information disclosure.
2993 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2994 INT_MIN/-1 -- value coerced to INT_MAX.
3000 NM/01 Workaround for PCRE version dependency in version reporting
3003 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3004 This fixes portability to compilers other than gcc, notably
3005 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3007 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3008 makefiles for portability to HP-UX and POSIX correctness.
3010 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3011 Also via indented variable definition in the Makefile.
3012 (Debugging by Oliver Heesakkers).
3014 PP/02 Restore caching of spamd results with expanded spamd_address.
3015 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3017 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3018 Improves build reliability. Fix from: Frank Elsner
3020 NM/02 Fix wide character breakage in the rfc2047 coding
3021 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3023 NM/03 Allow underscore in dnslist lookups
3024 Fixes bug 1026. Patch from Graeme Fowler
3026 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3027 Code patches from Adam Ciarcinski of NetBSD.
3029 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3032 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3033 is logged, to avoid truncation. Patch from John Horne.
3035 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3036 Patch from Jakob Hirsch.
3038 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3039 SQL string expansion failure details.
3040 Patch from Andrey Oktyabrski.
3042 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3043 Patch from Simon Arlott.
3045 PP/09 New lookups functionality failed to compile on old gcc which rejects
3046 extern declarations in function scope.
3047 Patch from Oliver Fleischmann
3049 PP/10 Use sig_atomic_t for flags set from signal handlers.
3050 Check getgroups() return and improve debugging.
3051 Fixed developed for diagnosis in bug 927 (which turned out to be
3054 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3055 Patch from Mark Zealey.
3057 PP/12 Bugzilla 1056: Improved spamd server selection.
3058 Patch from Mark Zealey.
3060 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3061 Based on patch from Heiko Schlittermann.
3063 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3064 Patch from Uwe Doering, sign-off by Michael Haardt.
3066 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3067 variable declaration deep within a block. Bug and patch from
3070 PP/15 lookups-Makefile IRIX compatibility coercion.
3072 PP/16 Make DISABLE_DKIM build knob functional.
3074 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3075 Patch by Simon Arlott
3077 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3078 variable argument macros. Our copy now differs from upstream.
3084 TF/01 Failure to get a lock on a hints database can have serious
3085 consequences so log it to the panic log.
3087 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3088 controlled using the smtp_confirmation log selector.
3090 TF/03 Include the error message when we fail to unlink a spool file.
3092 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3093 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3094 for maintaining out-of-tree patches for some time.
3096 PP/01 Bugzilla 139: Documentation and portability issues.
3097 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3098 Handle per-OS dynamic-module compilation flags.
3100 PP/02 Let /dev/null have normal permissions.
3101 The 4.73 fixes were a little too stringent and complained about the
3102 permissions on /dev/null. Exempt it from some checks.
3103 Reported by Andreas M. Kirchwitz.
3105 PP/03 Report version information for many libraries, including
3106 Exim version information for dynamically loaded libraries. Created
3107 version.h, now support a version extension string for distributors
3108 who patch heavily. Dynamic module ABI change.
3110 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3111 privilege escalation vulnerability whereby the Exim run-time user
3112 can cause root to append content of the attacker's choosing to
3115 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3118 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3119 If dropping privileges for untrusted macros, we disabled normal logging
3120 on the basis that it would fail; for the Exim run-time user, this is not
3121 the case, and it resulted in successful deliveries going unlogged.
3122 Fixed. Reported by Andreas Metzler.
3128 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3129 only prepend for the Resent-* case. Fixes regression introduced in
3130 Exim 4.70 by NM/22 for Bugzilla 607.
3132 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3133 increasing numbers of administrators be bitten by this.
3135 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3137 PP/03 Bugzilla 994: added openssl_options main configuration option.
3139 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3141 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3143 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3145 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3146 without a peer certificate, leading to a segfault because of an
3147 assumption that peers always have certificates. Be a little more
3148 paranoid. Problem reported by Martin Tscholak.
3150 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3151 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3152 NB: ClamAV planning to remove STREAM in "middle of 2010".
3153 CL also introduces -bmalware, various -d+acl logging additions and
3154 more caution in buffer sizes.
3156 PP/09 Implemented reverse_ip expansion operator.
3158 PP/10 Bugzilla 937: provide a "debug" ACL control.
3160 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3162 PP/12 Bugzilla 973: Implement --version.
3164 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3166 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3168 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3170 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3171 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3172 ignore trailing whitespace.
3174 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3176 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3179 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3180 Notification from Dr Andrew Aitchison.
3182 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3183 ExtendedDetectionInfo response format.
3184 Notification from John Horne.
3186 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3189 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3190 XSL and documented dependency on system catalogs, with examples of how
3193 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3196 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3197 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3198 configuration file which is writeable by the Exim user or group.
3200 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3201 of configuration files to cover files specified with the -C option if
3202 they are going to be used with root privileges, not just the default
3205 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3206 option (effectively making it always true).
3208 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3209 files to be used while preserving root privileges.
3211 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3212 that rogue child processes cannot use them.
3214 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3215 run-time user, instead of root.
3217 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3218 Exim run-time user without dropping privileges.
3220 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3221 result string, instead of calling string_vformat() twice with the same
3224 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3225 for other users. Others should always drop root privileges if they use
3226 -C on the command line, even for a whitelisted configure file.
3228 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3230 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3236 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3237 $data_path, and $header_path variables; fixed documentation bugs and
3240 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3241 exipick to access non-standard spools, including the "frozen" queue
3244 NM/01 Bugzilla 965: Support mysql stored procedures.
3245 Patch from Alain Williams
3247 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3249 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3250 Patch from Andreas Metzler
3252 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3253 Patch from Kirill Miazine
3255 NM/05 Bugzilla 671: Added umask to procmail example.
3257 JJ/03 installed exipick 20100323.0, fixing doc bug
3259 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3260 directory. Notification and patch from Dan Rosenberg.
3262 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3264 TK/02 Improve log output when DKIM signing operation fails.
3266 MH/01 Treat the transport option dkim_domain as a colon separated
3267 list, not as a single string, and sign the message with each element,
3268 omitting multiple occurences of the same signer.
3270 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3271 Bugzilla 985, 986. Patch by Simon Arlott
3273 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3274 Patch by Simon Arlott
3276 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3277 MBX locking. Notification from Dan Rosenberg.
3283 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3285 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3287 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3289 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3291 NM/04 Bugzilla 915: Flag broken perl installation during build.
3297 TK/01 Added patch by Johannes Berg that expands the main option
3298 "spamd_address" if it starts with a dollar sign.
3300 TK/02 Write list of recipients to X-Envelope-Sender header when building
3301 the mbox-format spool file for content scanning (suggested by Jakob
3304 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3305 (http://www.dcc-servers.net/) support via dccifd. Activated by
3306 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3308 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3309 by Mark Daniel Reidel <mr@df.eu>.
3311 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3312 When building exim an external PCRE library is now needed -
3313 PCRE is a system library on the majority of modern systems.
3314 See entry on PCRE_LIBS in EDITME file.
3316 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3317 conversation. Added nologin parameter to request.
3318 Patch contributed by Kirill Miazine.
3320 TF/01 Do not log submission mode rewrites if they do not change the address.
3322 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3324 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3325 log files in place. Contributed by Roberto Lima.
3327 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3329 TF/03 Bugzilla 615: When checking the local_parts router precondition
3330 after a local_part_suffix or local_part_prefix option, Exim now
3331 does not use the address's named list lookup cache, since this
3332 contains cached lookups for the whole local part.
3334 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3335 Robert Millan. Documentation is in experimental-spec.txt.
3337 TF/04 Bugzilla 668: Fix parallel build (make -j).
3339 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3341 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3342 Patch provided by Jan Srzednicki.
3344 TF/05 Leading white space used to be stripped from $spam_report which
3345 wrecked the formatting. Now it is preserved.
3347 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3348 that they are available at delivery time.
3350 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3352 TF/08 TLS error reporting now respects the incoming_interface and
3353 incoming_port log selectors.
3355 TF/09 Produce a more useful error message if an SMTP transport's hosts
3356 setting expands to an empty string.
3358 NM/06 Bugzilla 744: EXPN did not work under TLS.
3359 Patch provided by Phil Pennock.
3361 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3362 Patch provided by Richard Godbee.
3364 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3365 acl_smtp_notquit, added index entry.
3367 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3368 Patch provided by Eugene Bujak.
3370 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3371 accept(). Patch provided by Maxim Dounin.
3373 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3374 Patch provided by Phil Pennock.
3376 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3378 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3379 Patch provided by Brad "anomie" Jorsch.
3381 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3382 Patch provided by Dean Brooks.
3384 TK/05 Add native DKIM support (does not depend on external libraries).
3386 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3387 Patch provided by Graeme Fowler.
3389 NM/16 Bugzilla 851: Documentation example syntax fix.
3391 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3393 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3396 NM/19 Bugzilla 745: TLS version reporting.
3397 Patch provided by Phil Pennock.
3399 NM/20 Bugzilla 167: bool: condition support.
3400 Patch provided by Phil Pennock.
3402 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3403 clients. Patch provided by Phil Pennock.
3405 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3406 Patch provided by Brad "anomie" Jorsch.
3408 NM/23 Bugzilla 687: Fix misparses in eximstats.
3409 Patch provided by Heiko Schlittermann.
3411 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3412 Patch provided by Heiko Schlittermann.
3414 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3415 plus update to original patch.
3417 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3419 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3420 Patch provided by David Brownlee.
3422 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3424 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3426 NM/30 Bugzilla 888: TLS documentation bugfixes.
3428 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3430 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3431 Unlike the original bugzilla I have changed all shell scripts in src tree.
3433 NM/33 Bugzilla 898: Transport filter timeout fix.
3434 Patch by Todd Rinaldo.
3436 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3437 Patch by Serge Demonchaux.
3439 NM/35 Bugzilla 39: Base64 decode bug fixes.
3440 Patch by Jakob Hirsch.
3442 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3444 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3446 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3448 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3454 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3455 ALT-N's libdkim that I have put here:
3456 http://duncanthrax.net/exim-experimental/
3458 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3459 were called 'true' and it seems that C99 defines that as a reserved
3460 keyword to be used with 'bool' variable types. That means you could
3461 not include C99-style headers which use bools without triggering
3462 build errors in sieve.c.
3464 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3465 as mailq or other aliases. Changed the --help handling significantly
3466 to do whats expected. exim_usage() emits usage/help information.
3468 SC/01 Added the -bylocaldomain option to eximstats.
3470 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3472 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3474 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3480 PH/01 Another patch from the Sieve maintainer.
3482 PH/02 When an IPv6 address is converted to a string for single-key lookup
3483 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3484 dots are used instead of colons so that keys in lsearch files need not
3485 contain colons. This was done some time before quoting was made available
3486 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3487 (notated using the quote facility) so as to distinguish them from IPv4
3488 keys. This meant that lookups for IP addresses in host lists did not work
3489 for iplsearch lookups.
3491 This has been fixed by arranging for IPv6 addresses to be expressed with
3492 colons if the lookup type is iplsearch. This is not incompatible, because
3493 previously such lookups could never work.
3495 The situation is now rather anomalous, since one *can* have colons in
3496 ordinary lsearch keys. However, making the change in all cases is
3497 incompatible and would probably break a number of configurations.
3499 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3502 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3503 conversion specification without a maximum field width, thereby enabling
3504 a rogue spamd server to cause a buffer overflow. While nobody in their
3505 right mind would setup Exim to query an untrusted spamd server, an
3506 attacker that gains access to a server running spamd could potentially
3507 exploit this vulnerability to run arbitrary code as the Exim user.
3509 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3510 $primary_hostname instead of what libspf2 thinks the hosts name is.
3512 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3513 a directory entry by the name of the lookup key. Previously, if a
3514 symlink pointed to a non-existing file or a file in a directory that
3515 Exim lacked permissions to read, a lookup for a key matching that
3516 symlink would fail. Now it is enough that a matching directory entry
3517 exists, symlink or not. (Bugzilla 503.)
3519 PH/03 The body_linecount and body_zerocount variables are now exported in the
3522 PH/04 Added the $dnslist_matched variable.
3524 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3525 This means they are set thereafter only if the connection becomes
3528 PH/06 Added the client_condition to authenticators so that some can be skipped
3529 by clients under certain conditions.
3531 PH/07 The error message for a badly-placed control=no_multiline_responses left
3532 "_responses" off the end of the name.
3534 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3536 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3537 (without spaces) instead of just copying the configuration text.
3539 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3541 PH/11 Added $max_received_linelength.
3543 PH/12 Added +ignore_defer and +include_defer to host lists.
3545 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3546 way in which PCRE > 7.0 is built.
3548 PH/14 Implemented queue_only_load_latch.
3550 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3551 MAIL command. The effect was to mangle the value on 64-bit systems.
3553 PH/16 Another patch from the Sieve maintainer.
3555 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3557 PH/18 If a system quota error occurred while trying to create the file for
3558 a maildir delivery, the message "Mailbox is full" was not appended to the
3559 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3560 only to a quota excession during the actual writing of the file.
3562 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3563 characters?) which causes problems in log lines. The DN values are now
3564 passed through string_printing() before being added to log lines.
3566 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3567 and InterBase are left for another time.)
3569 PH/21 Added message_body_newlines option.
3571 PH/22 Guard against possible overflow in moan_check_errorcopy().
3573 PH/23 POSIX allows open() to be a macro; guard against that.
3575 PH/24 If the recipient of an error message contained an @ in the local part
3576 (suitably quoted, of course), incorrect values were put in $domain and
3577 $local_part during the evaluation of errors_copy.
3583 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3584 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3587 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3588 issue a MAIL command.
3590 PH/02 In an ACL statement such as
3592 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3594 if a client was not listed at all, or was listed with a value other than
3595 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3596 the condition was not true (as it should be), so access was not denied.
3597 The bug was that the ! inversion was incorrectly passed on to the second
3598 item. This has been fixed.
3600 PH/03 Added additional dnslists conditions == and =& which are different from
3601 = and & when the dns lookup returns more than one IP address.
3603 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3604 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3606 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3607 FSYNC, which compiles an option called disable_fsync that allows for
3608 bypassing fsync(). The documentation is heavily laced with warnings.
3610 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3612 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3613 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3614 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3615 including adding "make clean"; (3) Added -fPIC when compiling the test
3616 dynamically loaded module, to get rid of a warning.
3618 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3619 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3620 = 0s. The bug is otherwise harmless.
3622 PH/07 There was a bug in the dovecot authenticator such that the value of
3623 $auth1 could be overwritten, and so not correctly preserved, after a
3624 successful authentication. This usually meant that the value preserved by
3625 the server_setid option was incorrect.
3627 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3629 PH/09 Installed PCRE release 7.0.
3631 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3632 run for batched SMTP input. It is now run at the start of every message
3633 in the batch. While fixing this I discovered that the process information
3634 (output by running exiwhat) was not always getting set for -bs and -bS
3635 input. This is fixed, and it now also says "batched" for BSMTP.
3637 PH/11 Added control=no_pipelining.
3639 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3640 patch, slightly modified), and move the expansion of helo_data till after
3641 the connection is made in the smtp transport (so it can use these
3644 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3646 PH/14 Added log_selector = +pid.
3648 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3650 PH/16 Add ${if forany and ${if forall.
3652 PH/17 Added dsn_from option to vary the From: line in DSNs.
3654 PH/18 Flush SMTP output before performing a callout, unless control =
3655 no_callout_flush is set.
3657 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3658 was true (the default) a successful delivery failed to delete the retry
3659 item, thus causing premature timeout of the address. The bug is now
3662 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3664 PH/21 Long custom messages for fakedefer and fakereject are now split up
3665 into multiline responses in the same way that messages for "deny" and
3666 other ACL rejections are.
3668 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3669 with slight modification.
3671 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3672 draft, changing the syntax and factoring some duplicate code".
3674 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3675 for deliveries of the second and subsequent messages over the same SMTP
3678 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3679 ${reduce, with only minor "tidies".
3681 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3683 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3684 expansion side effects.
3686 PH/27 When a message times out after an over-quota error from an Exim-imposed
3687 quota, the bounce message says "mailbox is full". This message was not
3688 being given when it was a system quota that was exceeded. It now should
3691 MH/03 Made $recipients available in local_scan(). local_scan() already has
3692 better access to the recipient list through recipients_list[], but
3693 $recipients can be useful in postmaster-provided expansion strings.
3695 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3696 in the case of a MAIL command with additional options following the
3697 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3698 were accidentally chopped off.
3700 PH/29 SMTP synchronization checks are implemented when a command is read -
3701 there is a check that no more input is waiting when there shouldn't be
3702 any. However, for some commands, a delay in an ACL can mean that it is
3703 some time before the response is written. In this time, more input might
3704 arrive, invalidly. So now there are extra checks after an ACL has run for
3705 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3706 pipelining has not been advertised.
3708 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3710 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3711 returned in the SMTP response when smtp_return_error_details was false.
3712 This has been fixed.
3714 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3715 instead of the C I/O that was originally supplied, because problems were
3716 reported on Solaris.
3718 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3719 Exim which did not show up earlier: it was assuming that a call to
3720 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3721 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3722 was a macro that became an assignment, so it seemed to work. This has
3723 changed to a proper function call with a void return, hence the compile
3724 error. Exim's code has been fixed.
3726 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3729 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3731 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3733 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3734 because it turns out to be too big or there is a timeout) there is no
3735 "Completed" line in the log. When some messages of this type were
3736 selected by exigrep, they were listed as "not completed". Others were
3737 picked up by some special patterns. I have improved the selection
3738 criteria to be more general.
3740 PH/38 The host_find_failed option in the manualroute router can now be set
3741 to "ignore", to completely ignore a host whose IP address cannot be
3742 found. If all hosts are ignored, the behaviour is controlled by the new
3743 host_all_ignored option.
3745 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3746 homing or because of multiple MX records with /mx) generated more than
3747 one IP address, and the following item turned out to be the local host,
3748 all the secondary addresses of the first item were incorrectly removed
3749 from the list, along with the local host and any following hosts (which
3750 is what is supposed to happen).
3752 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3753 whoever called Exim into the -H file. In the case of the daemon it was
3754 behaving confusingly. When first started, it used values for whoever
3755 started the daemon, but after a SIGHUP it used the Exim user (because it
3756 calls itself on a restart). I have changed the code so that it now always
3759 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3760 message are rejected with the same error (e.g. no authentication or bad
3761 sender address), and a DATA command is nevertheless sent (as can happen
3762 with PIPELINING or a stupid MUA), the error message that was given to the
3763 RCPT commands is included in the rejection of the DATA command. This is
3764 intended to be helpful for MUAs that show only the final error to their
3767 PH/42 Another patch from the Sieve maintainer.
3769 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3770 Eximstats - Fixed some broken HTML links and added missing column headers
3772 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3773 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3775 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3777 PH/43 Yet another patch from the Sieve maintainer.
3779 PH/44 I found a way to check for a TCP/IP connection going away before sending
3780 the response to the final '.' that terminates a message, but only in the
3781 case where the client has not sent further data following the '.'
3782 (unfortunately, this is allowed). However, in many cases there won't be
3783 any further data because there won't be any more messages to send. A call
3784 to select() can be used: if it shows that the input is "ready", there is
3785 either input waiting, or the socket has been closed. An attempt to read
3786 the next input character can distinguish the two cases. Previously, Exim
3787 would have sent an OK response which the client would never have see.
3788 This could lead to message repetition. This fix should cure that, at
3789 least in a lot of common cases.
3791 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3792 advertised in response to EHLO.
3798 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3799 fixed by 4.65/MH/01 (is this a record?) are fixed:
3801 (i) An empty string was always treated as zero by the numeric comparison
3802 operators. This behaviour has been restored.
3804 (ii) It is documented that the numeric comparison operators always treat
3805 their arguments as decimal numbers. This was broken in that numbers
3806 starting with 0 were being interpreted as octal.
3808 While fixing these problems I realized that there was another issue that
3809 hadn't been noticed. Values of message_size_limit (both the global option
3810 and the transport option) were treated as octal if they started with 0.
3811 The documentation was vague. These values are now always treated as
3812 decimal, and I will make that clear in the documentation.
3818 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3819 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3822 MH/01 Don't check that the operands of numeric comparison operators are
3823 integers when their expansion is in "skipping" mode (fixes bug
3824 introduced by 4.64-PH/07).
3826 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3827 child addresses, Exim now panics and dies. Previously, because the count
3828 is held in a short int, deliveries were likely to be lost. As such a
3829 large number of recipients for a single message is ridiculous
3830 (performance will be very, very poor), I have chosen to impose a limit
3831 rather than extend the field.
3837 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3838 leftover -K file (the existence of which was triggered by #402).
3839 While we were at it, introduced process PID as part of the -K
3840 filename. This should rule out race conditions when creating
3843 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3844 processing considerably. Previous code took too long for large mails,
3845 triggering a timeout which in turn triggers #401.
3847 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3848 in the DK code in transports.c. sendfile() is not really portable,
3849 hence the _LINUX specificness.
3851 TF/01 In the add_headers option to the mail command in an Exim filter,
3852 there was a bug that Exim would claim a syntax error in any
3853 header after the first one which had an odd number of characters
3856 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3857 callout verification, Exim cached a "reject" for the entire domain. This
3858 is correct for most verifications, but it is not correct for a recipient
3859 verification with use_sender or use_postmaster set, because in that case
3860 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3861 case of MAIL FROM:<> rejection from other early rejections (e.g.
3862 rejection of HELO). When verifying a recipient using a non-null MAIL
3863 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3864 Whatever the result of the callout, the value of the domain cache is
3865 left unchanged (for any other kind of callout, getting as far as trying
3866 RCPT means that the domain itself is ok).
3868 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3871 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3872 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3873 session, the daemon ignores ECONNECT errors and logs others; it now
3874 ignores EPIPE as well.
3876 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3877 (quoted-printable decoding).
3879 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3880 later the small subsequent patch to fix an introduced bug.
3882 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3884 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3886 PH/08 An error is now given if message_size_limit is specified negative.
3888 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3889 to be given (somewhat) arbitrary names.
3891 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3894 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3895 miscellaneous code fixes
3897 PH/10 Added the log_reject_target ACL modifier to specify where to log
3900 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3901 hostname. This is wrong, because it relates to the incoming message (and
3902 probably the interface on which it is arriving) and not to the outgoing
3903 callout (which could be using a different interface). This has been
3904 changed to use the value of the helo_data option from the smtp transport
3905 instead - this is what is used when a message is actually being sent. If
3906 there is no remote transport (possible with a router that sets up host
3907 addresses), $smtp_active_hostname is used.
3909 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3910 tweaks were necessary in order to get it to work (see also 21 below):
3911 (a) The code assumed that strncpy() returns a negative number on buffer
3912 overflow, which isn't the case. Replaced with Exim's string_format()
3914 (b) There were several signed/unsigned issues. I just did the minimum
3915 hacking in of casts. There is scope for a larger refactoring.
3916 (c) The code used strcasecmp() which is not a standard C function.
3917 Replaced with Exim's strcmpic() function.
3918 (d) The code set only $1; it now sets $auth1 as well.
3919 (e) A simple test gave the error "authentication client didn't specify
3920 service in request". It would seem that Dovecot has changed its
3921 interface. Fortunately there's a specification; I followed it and
3922 changed what the client sends and it appears to be working now.
3924 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3927 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3928 address A is aliased to B and C, where B exists and C does not. Without
3929 -v the output is "A verified" because verification stops after a
3930 successful redirection if more than one address is generated. However,
3931 with -v the child addresses are also verified. Exim was outputting "A
3932 failed to verify" and then showing the successful verification for C,
3933 with its parentage. It now outputs "B failed to verify", showing B's
3934 parentage before showing the successful verification of C.
3936 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3937 look up a TXT record in a specific list after matching in a combined
3940 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3941 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3942 they consult the DNS. I had assumed they would set it the way they
3943 wanted; and indeed my experiments on Linux seem to show that in some
3944 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3945 To be on the safe side, however, I have now made the interface to
3946 host_find_byname() similar to host_find_bydns(), with an argument
3947 containing the DNS resolver options. The host_find_byname() function now
3948 sets these options at its start, just as host_find_bydns() does. The smtp
3949 transport options dns_qualify_single and dns_search_parents are passed to
3950 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3951 of host_find_byname() use the default settings of RES_DEFNAMES
3952 (qualify_single) but not RES_DNSRCH (search_parents).
3954 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3955 spool_read_header() do less string testing, by means of a preliminary
3956 switch on the second character of optional "-foo" lines. (This is
3957 overdue, caused by the large number of possibilities that now exist.
3958 Originally there were few.) While I was there, I also converted the
3959 str(n)cmp tests so they don't re-test the leading "-" and the first
3960 character, in the hope this might squeeze out yet more improvement.
3962 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3963 flag allowing group syntax was set by the header_syntax check but not
3964 turned off, possible causing trouble later; (2) The flag was not being
3965 set at all for the header_verify test, causing "group"-style headers to
3966 be rejected. I have now set it in this case, and also caused header_
3967 verify to ignore an empty address taken from a group. While doing this, I
3968 came across some other cases where the code for allowing group syntax
3969 while scanning a header line wasn't quite right (mostly, not resetting
3970 the flag correctly in the right place). These bugs could have caused
3971 trouble for malformed header lines. I hope it is now all correct.
3973 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3974 with the "reply" argument non-NULL. The code, however (which originally
3975 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3976 but it didn't always do it. This confused somebody who was copying the
3977 code for some other use. I have removed all the tests.
3979 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3980 feature that was used to support insecure browsers during the U.S. crypto
3981 embargo. It requires special client support, and Exim is probably the
3982 only MTA that supported it -- and would never use it because real RSA is
3983 always available. This code has been removed, because it had the bad
3984 effect of slowing Exim down by computing (never used) parameters for the
3985 RSA_EXPORT functionality.
3987 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3988 authenticator to fail if there's a tab character in the incoming data
3989 (there should never be unless someone is messing about, as it's supposed
3990 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3991 if the connection is using TLS or if the remote IP is the same as the
3992 local IP, and the "valid-client-cert option" if a client certificate has
3995 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3996 authenticators. This can be used for authorization after authentication
3997 succeeds. (In the case of plaintext, it servers for both authentication
4000 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4001 if any retry times were supplied.
4003 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4004 connection, where there is no client IP address to check. In this
4005 situation, the verify now always succeeds.
4007 PH/25 Applied John Jetmore's -Mset patch.
4009 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4011 PH/27 In a string expansion for a processed (not raw) header when multiple
4012 headers of the same name were present, leading whitespace was being
4013 removed from all of them, but trailing whitespace was being removed only
4014 from the last one. Now trailing whitespace is removed from each header
4015 before concatenation. Completely empty headers in a concatenation (as
4016 before) are ignored.
4018 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4019 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4021 PH/29 [Removed. This was a change that I later backed out, and forgot to
4022 correct the ChangeLog entry (that I had efficiently created) before
4023 committing the later change.]
4025 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4026 address errors (4xx response to RCPT) over the same connection as other
4027 messages routed to the same hosts. Such deliveries are always "forced",
4028 so retry times are not inspected. This resulted in far too many retries
4029 for the affected addresses. The effect occurred only when there were more
4030 hosts than the hosts_max_try setting in the smtp transport when it had
4031 the 4xx errors. Those hosts that it had tried were not added to the list
4032 of hosts for which the message was waiting, so if all were tried, there
4033 was no problem. Two fixes have been applied:
4035 (i) If there are any address or message errors in an SMTP delivery, none
4036 of the hosts (tried or untried) are now added to the list of hosts
4037 for which the message is waiting, so the message should not be a
4038 candidate for sending over the same connection that was used for a
4039 successful delivery of some other message. This seems entirely
4040 reasonable: after all the message is NOT "waiting for some host".
4041 This is so "obvious" that I'm not sure why it wasn't done
4042 previously. Hope I haven't missed anything, but it can't do any
4043 harm, as the worst effect is to miss an optimization.
4045 (ii) If, despite (i), such a delivery is accidentally attempted, the
4046 routing retry time is respected, so at least it doesn't keep
4047 hammering the server.
4049 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4050 in ${readsocket because some servers need this prod.
4052 PH/32 Added some extra debug output when updating a wait-xxx database.
4054 PH/33 The hint "could be header name not terminated by colon", which has been
4055 given for certain expansion errors for a long time, was not being given
4056 for the ${if def:h_colon_omitted{... case.
4058 PH/34 The spec says: "With one important exception, whenever a domain list is
4059 being scanned, $domain contains the subject domain." There was at least
4060 one case where this was not true.
4062 PH/35 The error "getsockname() failed: connection reset by peer" was being
4063 written to the panic log as well as the main log, but it isn't really
4064 panic-worthy as it just means the connection died rather early on. I have
4065 removed the panic log writing for the ECONNRESET error when getsockname()
4068 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4069 runs only) independently of the message's sender address. This meant
4070 that, if the 4xx error was in fact related to the sender, a different
4071 message to the same recipient with a different sender could confuse
4072 things. In particular, this can happen when sending to a greylisting
4073 server, but other circumstances could also provoke similar problems.
4074 I have changed the default so that the retry time for these errors is now
4075 based a combination of the sender and recipient addresses. This change
4076 can be overridden by setting address_retry_include_sender=false in the
4079 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4080 remote server are returned as part of bounce messages. This was not
4081 happening for LMTP over a pipe (the lmtp transport), but now it is the
4082 same for both kinds of LMTP.
4084 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4085 in header lines that were in fact CNAMEs. This is no longer the case.
4087 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4088 and queue runs started by the daemon processed all messages. This has
4089 been fixed so that -R and -S can now usefully be given with -q<time>.
4091 PH/40 Import PCRE release 6.7 (fixes some bugs).
4093 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4095 PH/42 Give an error if -q is specified more than once.
4097 PH/43 Renamed the variables $interface_address and $interface_port as
4098 $received_ip_address and $received_port, to make it clear that these
4099 values apply to message reception, and not to the outgoing interface when
4100 a message is delivered. (The old names remain recognized, of course.)
4102 PH/44 There was no timeout on the connect() call when using a Unix domain
4103 socket in the ${readsocket expansion. There now is.
4105 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4106 be meaningful with "accept".
4108 SC/01 Eximstats V1.43
4109 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4111 SC/02 Eximstats V1.44
4112 Use a glob alias rather than an array ref in the generated
4113 parser. This improves both readability and performance.
4115 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4116 Collect SpamAssassin and rejection statistics.
4117 Don't display local sender or destination tables unless
4118 there is data to show.
4119 Added average volumes into the top table text output.
4121 SC/04 Eximstats V1.46
4122 Collect data on the number of addresses (recipients)
4123 as well as the number of messages.
4125 SC/05 Eximstats V1.47
4126 Added 'Message too big' to the list of mail rejection
4127 reasons (thanks to Marco Gaiarin).
4129 SC/06 Eximstats V1.48
4130 Mainlog lines which have GMT offsets and are too short to
4131 have a flag are now skipped.
4133 SC/07 Eximstats V1.49 (Alain Williams)
4134 Added the -emptyok flag.
4136 SC/08 Eximstats V1.50
4137 Fixes for obtaining the IP address from reject messages.
4139 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4140 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4141 whitespace changes from 4.64-PH/27
4143 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4146 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4147 are found, allow negative numbers in numeric criteria)
4149 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4151 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4152 to match changes made in 4.64-PH/43
4154 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4156 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4157 "domain" is actually an IP address, and force a failure. This locks out
4158 those revolvers/nameservers that support "A-for-A" lookups, in
4159 contravention of the specifications.
4161 PH/48 When a host name was looked up from an IP address, and the subsequent
4162 forward lookup of the name timed out, the host name was left in
4163 $sender_host_name, contrary to the specification.
4165 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4166 restricted to single-key lookups, Exim was not diagnosing an error if
4167 * or *@ was used with a query-style lookup.
4169 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4171 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4172 long ago, but noone interested enough thought of it. Let's just say that
4173 the "1.1" means that there are some new functions that weren't there at
4174 some point in the past.
4176 PH/51 Error processing for expansion failure of helo_data from an smtp
4177 transport during callout processing was broken.
4179 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4180 tested/used via the -bh/-bhc/-bs options.
4182 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4183 bug, fixed in subsequent PCRE releases).
4185 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4186 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4188 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4194 SC/01 Use a glob alias rather than an array ref in eximstats generated
4195 parser. This improves both readability and performance.
4197 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4198 Don't display local sender or destination tables in eximstats unless
4199 there is data to show.
4200 Added average volumes into the eximstats top table text output.
4202 SC/03 Collect data on the number of addresses (recipients) as well
4203 as the number of messages in eximstats.
4205 TF/01 Correct an error in the documentation for the redirect router. Exim
4206 does (usually) call initgroups() when daemonizing.
4208 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4209 with consistent privilege compared to when running as a daemon.
4211 TF/03 Note in the spec that $authenticated_id is not set for local
4212 submissions from trusted users.
4214 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4215 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4217 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4218 by adding some example configuration directives to the default
4219 configuration file. A little bit of work is required to uncomment the
4220 directives and define how usernames and passwords are checked, but
4221 there is now a framework to start from.
4223 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4224 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4225 without this. I don't know how relevant this is to other LDAP libraries.
4227 PH/02 Add the verb name to the "unknown ACL verb" error.
4229 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4231 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4233 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4234 directory not expanded when it should be if an expanded home directory
4235 was set for the address (which is overridden by the transport).
4237 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4240 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4241 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4242 because it is too late at that time, and has no effect.
4244 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4245 security issue with \' (bugzilla #107). I could not use the
4246 PQescapeStringConn() function, because it needs a PGconn value as one of
4249 PH/08 When testing addresses using -bt, indicate those final addresses that
4250 are duplicates that would not cause an additional delivery. At least one
4251 person was confused, thinking that -bt output corresponded to deliveries.
4252 (Suppressing duplicates isn't a good idea as you lose the information
4253 about possibly different redirections that led to the duplicates.)
4255 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4256 systems where poll() doesn't work, in particular OS X.
4258 PH/10 Added more information to debugging output for retry time not reached.
4260 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4261 operations in malware.c.
4263 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4266 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4267 syslog_duplication set false, log lines that would normally be written
4268 both the the main log and to the reject log were not written to syslog at
4271 PH/14 In the default configuration, change the use of "message" in ACL warn
4272 statements to "add_header".
4274 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4275 not followed by a command (e.g. "seen endif").
4277 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4278 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4281 PH/17 Added extra conditions to the default value of delay_warning_condition
4285 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4286 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4287 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4290 The Auto-Submitted: and various List- headers are standardised, whereas I
4291 don't think Precedence: ever was.
4293 PH/18 Refactored debugging code in route_finduser() to show more information,
4294 in particular, the error code if getpwnam() issues one.
4296 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4297 This is apparently needed in addition to the PH/07 change above to avoid
4298 any possible encoding problems.
4300 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4301 but not after initializing Perl.
4303 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4304 output them only if debugging. By default they are written stderr,
4305 apparently, which is not desirable.
4307 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4310 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4313 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4315 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4316 authenticated or an ident call has been made. Suppress the default
4317 values for $authenticated_id and $authenticated_sender (but permit -oMai
4318 and -oMas) when testing with -bh.
4320 PH/24 Re-jigged the order of the tests in the default configuration so that the
4321 tests for valid domains and recipients precede the DNS black list and CSA
4322 tests, on the grounds that those ones are more expensive.
4324 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4325 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4326 This bug exists in every version of Exim that I still have, right back to
4329 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4330 However, an attempt to turn on case-sensitivity in a regex key by
4331 including (?-i) didn't work because the subject string was already
4332 lowercased, and the effects were non-intuitive. It turns out that a
4333 one-line patch can be used to allow (?-i) to work as expected.
4339 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4340 other effects) broke the use of negated acl sub-conditions.
4342 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4345 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4346 "Deny" causes Exim to reject the incoming connection with a 554 error.
4347 Unfortunately, if there is a major crisis, such as a disk failure,
4348 tcp-wrappers gives "deny", whereas what one would like would be some
4349 kind of temporary error. A kludge has been added to help with this.
4350 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4351 554 error is used if errno is still zero or contains ENOENT (which occurs
4352 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4355 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4357 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4358 errors. Otherwise a message that provokes a temporary error (when other
4359 messages do not) can cause a whole host to time out.
4361 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4362 addresses were routed directly to files or pipes from a redirect router.
4363 File deliveries just didn't batch; pipe deliveries might have suffered
4366 PH/06 A failure to get a lock for a hints database would erroneously always say
4367 "Failed to get write lock", even when it was really a read lock.
4369 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4370 of 0600. This has been changed to use the value of the lockfile_mode
4371 option (which defaults to 0600).
4373 PH/08 Applied small patch from the Sieve maintainer.
4375 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4376 folder from quota calculations, a direct delivery into this folder messed
4377 up the contents of the maildirsize file. This was because the regex was
4378 used only to exclude .Trash (or whatever) when the size of the mailbox
4379 was calculated. There was no check that a delivery was happening into an
4380 excluded directory. This bug has been fixed by ignoring all quota
4381 processing for deliveries into excluded directories.
4383 PH/10 Added the maildirfolder_create_regex option to appendfile.
4389 PH/01 The code for finding all the local interface addresses on a FreeBSD
4390 system running IPv6 was broken. This may well have applied to all BSD
4391 systems, as well as to others that have similar system calls. The broken
4392 code found IPv4 interfaces correctly, but gave incorrect values for the
4393 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4394 that it would not match correctly against @[] and not recognize the IPv6
4397 PH/02 The ipliteral router was not recognizing addresses of the form user@
4398 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4400 PH/03 Added disable_ipv6.
4402 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4403 decoded form, because it is most often used to construct To: headers
4404 lines in autoreplies, and the decoded form may well be syntactically
4405 invalid. However, $reply_address has leading white space removed, and all
4406 newlines turned into spaces so that the autoreply transport does not
4409 PH/05 If group was specified without a user on a router, and no group or user
4410 was specified on a transport, the group from the router was ignored.
4412 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4413 for visible compile-time settings that can be used to change these
4414 numbers, for those that want even more. Backwards compatibility with old
4415 spool files has been maintained. However, going back to a previous Exim
4416 release will lost any variables that are in spool files.
4418 PH/07 Two small changes when running in the test harness: increase delay when
4419 passing a TCP/IP connection to a new process, in case the original
4420 process has to generate a bounce, and remove special handling of
4421 127.0.0.2 (sic), which is no longer necessary.
4423 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4424 be the same on different OS.
4426 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4429 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4430 whether --show-vars was specified or not
4432 JJ/02 exipick: Added support for new ACL variable spool format introduced
4435 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4436 syntactically invalid From: or Reply-to: line, and a filter used this to
4437 generate an autoreply, and therefore failed to obtain an address for the
4438 autoreply, Exim could try to deliver to a non-existent relative file
4439 name, causing unrelated and misleading errors. What now happens is that
4440 it logs this as a hard delivery error, but does not attempt to create a
4443 PH/11 The exinext utility has a -C option for testing purposes, but although
4444 the given file was scanned by exinext itself; it wasn't being passed on
4445 when Exim was called.
4447 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4448 an end-of-file indication when reading a command response.
4450 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4451 compiled. In many other places in Exim, IPv6 addresses are always
4452 recognized, so I have changed this. It also means that IPv4 domain
4453 literals of the form [IPV4:n.n.n.n] are now always recognized.
4455 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4456 used if the router is not running as root, for example, when verifying at
4457 ACL time, or when using -bh. The debugging output from this situation was
4458 non-existent - all you got was a failure to exec. I have made two
4461 (a) Failures to set uid/gid, the current directory, or a process leader
4462 in a subprocess such as that created by queryprogram now generate
4463 suitable debugging output when -d is set.
4465 (b) The queryprogram router detects when it is not running as root,
4466 outputs suitable debugging information if -d is set, and then runs
4467 the subprocess without attempting to change uid/gid.
4469 PH/15 Minor change to Makefile for building test_host (undocumented testing
4472 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4473 additional section of a DNS packet that returns MX or SRV records.
4474 Instead, it always explicitly searches for A/AAAA records. This avoids
4475 major problems that occur when a DNS server includes only records of one
4476 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4477 fixed another bug: if SRV records were looked up and the corresponding
4478 address records were *not* found in the additional section, the port
4479 values from the SRV records were lost.
4481 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4482 using the correct key (the original address) when searching the retry
4483 rules in order to find which one to use for generating the retry hint.
4485 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4486 adding the default one. Similarly, if it contains a Reply-To: header, the
4487 errors_reply_to option, if set, is not used.
4489 PH/19 When calculating a retry time, Exim used to measure the "time since
4490 failure" by looking at the "first failed" field in the retry record. Now
4491 it does not use this if it is later than than the arrival time of the
4492 message. Instead it uses the arrival time. This makes for better
4493 behaviour in cases where some deliveries succeed, thus re-setting the
4494 "first failed" field. An example is a quota failure for a huge message
4495 when small messages continue to be delivered. Without this change, the
4496 "time since failure" will always be short, possible causing more frequent
4497 delivery attempts for the huge message than are intended.
4498 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4500 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4501 $1, $2, $3) because the numerical variables can be reset during some
4502 expansion items (e.g. "match"), thereby losing the authentication data.
4504 PH/21 Make -bV show the size of off_t variables so that the test suite can
4505 decide whether to run tests for quotas > 2G.
4507 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4508 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4509 filecount value is greater than 2G or if a quota value is greater than 2G
4510 on a system where the size of off_t is not greater than 4, a panic error
4513 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4514 never match. The debug and -bh output now contains an explicit error
4515 message indicating a malformed IPv4 address or mask.
4517 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4518 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4519 PH/23 above applies.
4521 PH/25 Do not write to syslog when running in the test harness. The only
4522 occasion when this arises is a failure to open the main or panic logs
4523 (for which there is an explicit test).
4525 PH/26 Added the /no_tell option to "control=freeze".
4527 PH/27 If a host name lookup failed very early in a connection, for example, if
4528 the IP address matched host_lookup and the reverse lookup yielded a name
4529 that did not have a forward lookup, an error message of the form "no IP
4530 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4531 could be logged. Now it outputs the IP address instead of "NULL".
4533 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4534 allows the sender and the authenticated sender to be set when
4535 submitting a message from within Exim. Since child_open_exim() is
4536 documented for local_scan(), the new function should be too.
4538 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4539 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4540 results in an empty string is now treated as unset.
4542 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4544 PH/31 Added sender_verify_fail logging option.
4546 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4547 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4548 tidied the source and removed it altogether.
4550 PH/33 When a queue run was abandoned because the load average was too high, a
4551 log line was always written; now it is written only if the queue_run log
4552 selector is set. In addition, the log line for abandonment now contains
4553 information about the queue run such as the pid. This is always present
4554 in "start" and "stop" lines but was omitted from the "abandon" line.
4556 PH/34 Omit spaces between a header name and the colon in the error message that
4557 is given when verify = headers_syntax fails (if there are lots of them,
4558 the message gets confusing).
4560 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4561 names, as there are now some PTR records that contain slashes. This check
4562 is only to protect against broken name servers that fall over on strange
4563 characters, so the fact that it applies to all lookups doesn't matter.
4565 PH/36 Now that the new test suite is complete, we can remove some of the
4566 special code in Exim that was needed for the old test suite. For example,
4567 sorting DNS records because real resolvers return them in an arbitrary
4568 order. The new test suite's fake resolver always returns records in the
4571 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4572 bounces) except when queue_only is set, to avoid logging races between
4573 the different processes.
4575 PH/38 Panic-die if .include specifies a non-absolute path.
4577 PH/39 A tweak to the "H" retry rule from its user.
4579 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4580 a label. They prevented compilation on older perls.
4582 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4583 a warning to be raised on newish perls.
4585 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4586 on queue. Changes to match documented behaviour of showing count of
4587 messages matching specified criteria.
4589 PH/40 Changed the default ident timeout from 30s to 5s.
4591 PH/41 Added support for the use of login_cap features, on those BSD systems
4592 that have them, for controlling the resources used by pipe deliveries.
4594 PH/42 The content-scanning code uses fopen() to create files in which to put
4595 message data. Previously it was not paying any attention to the mode of
4596 the files. Exim runs with umask(0) because the rest of the code creates
4597 files with open(), and sets the required mode explicitly. Thus, these
4598 files were ending up world-writeable. This was not a big issue, because,
4599 being within the spool directory, they were not world-accessible. I have
4600 created a function called modefopen, which takes an additional mode
4601 argument. It sets umask(777), creates the file, chmods it to the required
4602 mode, then resets the umask. All the relevant calls to fopen() in the
4603 content scanning code have been changed to use this function.
4605 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4606 to 24 hours. This avoids potential overflow problems when processing G
4607 and H retry rules. I suspect nobody ever tinkers with this value.
4609 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4611 PH/45 When the plaintext authenticator is running as a client, the server's
4612 challenges are checked to ensure they are valid base64 strings. By
4613 default, the authentication attempt is cancelled if an invalid string is
4614 received. Setting client_ignore_invalid_base64 true ignores these errors.
4615 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4616 they are received. Thus, the responses can be made to depend on the
4617 challenges. If an invalid string is ignored, an empty string is placed in
4620 PH/46 Messages that are created by the autoreply transport now contains a
4621 References: header, in accordance with RFCs 2822 and 3834.
4623 PH/47 Added authenticated_sender_force to the smtp transport.
4625 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4627 PH/49 Installed latest patch from the Sieve maintainer.
4629 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4630 was also set, the appendfile transport was unnecessarily scanning a
4631 directory of message files (e.g. for maildir delivery) to find the count
4632 of files (along with the size), even though it did not need this
4633 information. It now does the scan only if it needs to find either the
4634 size of the count of files.
4636 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4638 PH/52 Two bugs concerned with error handling when the smtp transport is
4641 (i) Exim was not creating retry information for temporary errors given
4642 for individual recipients after the DATA command when the smtp transport
4643 was used in LMTP mode. This meant that they could be retried too
4644 frequently, and not timed out correctly.
4646 (ii) Exim was setting the flag that allows error details to be returned
4647 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4648 recipients that were returned after the DATA command.
4650 PH/53 This is related to PH/52, but is more general: for any failing address,
4651 when detailed error information was permitted to be returned to the
4652 sender, but the error was temporary, then after the final timeout, only
4653 "retry timeout exceeded" was returned. Now it returns the full error as
4654 well as "retry timeout exceeded".
4656 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4657 do this, and (what is worse) MTAs that accept it.
4659 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4660 will now be deprecated.
4662 PH/56 New os.c-cygwin from the Cygwin maintainer.
4664 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4665 formats (previously only available in exim formats via -bpr, -bpru,
4666 and -bpra. Now also available in native and exiqgrep formats)
4668 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4669 with very large, slow to parse queues
4671 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4673 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4675 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4676 responses to authentication challenges, though it was showing the
4677 challenges; (ii) I've removed the CR characters from the debug output for
4680 PH/58 Allow for the insertion of a newline as well as a space when a string
4681 is turned into more than one encoded-word during RFC 2047 encoding. The
4682 Sieve code now uses this.
4684 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4685 data_4xx, lost_connection, tls_required.
4687 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4688 message was being sent as an SMTP response.
4690 PH/61 Add -l and -k options to exicyclog.
4692 PH/62 When verifying, if an address was redirected to one new address, so that
4693 verification continued, and the new address failed or deferred after
4694 having set something in $address_data, the value of $address_data was not
4695 passed back to the ACL. This was different to the case when no
4696 redirection occurred. The value is now passed back in both cases.
4698 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4699 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4700 use login_cap.h, so on its own it isn't the distinguishing feature. The
4701 new name refers directly to the setclassresources() function.
4703 PH/65 Added configuration files for NetBSD3.
4705 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4707 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4708 is preferred over IPv4.
4710 PH/68 The bounce_return_message and bounce_return_body options were not being
4711 honoured for bounces generated during the reception of non-SMTP messages.
4712 In particular, this applied to messages rejected by the ACL. This bug has
4713 been fixed. However, if bounce_return_message is true and bounce_return_
4714 body is false, the headers that are returned for a non-SMTP message
4715 include only those that have been read before the error was detected.
4716 (In the case of an ACL rejection, they have all been read.)
4718 PH/69 The HTML version of the specification is now built in a directory called
4719 spec_html instead of spec.html, because the latter looks like a path with
4720 a MIME-type, and this confuses some software.
4722 PH/70 Catch two compiler warnings in sieve.c.
4724 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4725 function verify_get_ident() calls ip_connect() to connect a socket, but
4726 if the "connect()" function timed out, ip_connect() used to close the
4727 socket. However, verify_get_ident() also closes the socket later, and in
4728 between Exim writes to the log, which may get opened at this point. When
4729 the socket was closed in ip_connect(), the log could get the same file
4730 descriptor number as the socket. This naturally causes chaos. The fix is
4731 not to close the socket in ip_connect(); the socket should be closed by
4732 the function that creates it. There was only one place in the code where
4733 this was missing, in the iplookup router, which I don't think anybody now
4734 uses, but I've fixed it anyway.
4736 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4737 well as to direct DNS lookups. Otherwise the handling of names in host
4738 lists is inconsistent and therefore confusing.
4744 PH/01 Two changes to the default runtime configuration:
4746 (1) Move the checks for relay_from_hosts and authenticated clients from
4747 after to before the (commented out) DNS black list checks.
4749 (2) Add control=submission to the relay_from_hosts and authenticated
4750 clients checks, on the grounds that messages accepted by these
4751 statements are most likely to be submissions.
4753 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4755 (1) Generate an error if the third argument for the ${prvs expansion is
4758 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4761 (3) Reset the variables that are obtained from the first argument of
4762 ${prvscheck and used in the second argument before leaving the code,
4763 because their memory is reclaimed, so using them afterwards may do
4766 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4767 one (it's much easier than Tom thought :-).
4769 (5) Because of (4), we can now allow for the use of $prvscheck_result
4770 inside the third argument.
4772 PH/03 For some reason, the default setting of PATH when running a command from
4773 a pipe transport was just "/usr/bin". I have changed it to
4776 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4777 anything to be listed in the output from -bV.
4779 PH/05 When a filter generated an autoreply, the entire To: header line was
4780 quoted in the delivery log line, like this:
4782 => >A.N.Other <ano@some.domain> <original@ddress> ...
4784 This has been changed so that it extracts the operative address. There
4785 may be more than one such address. If so, they are comma-separated, like
4788 => >ano@some.domain,ona@other.domain <original@ddress> ...
4790 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4791 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4792 not being looked up in the rDNS to get a host name, Exim was showing the
4793 IP address twice in Received: lines, even though the IP addresses were
4794 identical. For example:
4796 Received: from [1.2.3.4] (helo=[1.2.3.4])
4798 However, if the real host name was known, it was omitting the HELO data
4799 if it matched the actual IP address. This has been tidied up so that it
4800 doesn't show the same IP address twice.
4802 PH/07 When both +timestamp and +memory debugging was on, the value given by
4803 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4804 called by the debug printing, thereby overwriting the timestamp buffer.
4805 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4807 PH/08 When the original message was included in an autoreply transport, it
4808 always said "this is a copy of the message, including all the headers",
4809 even if body_only or headers_only was set. It now gives an appropriate
4812 PH/09 Applied a patch from the Sieve maintainer which:
4814 o fixes some comments
4815 o adds the (disabled) notify extension core
4816 o adds some debug output for the result of if/elsif tests
4817 o points to the current vacation draft in the documentation
4818 and documents the missing references header update
4822 o fixes a bug in processing the envelope test (when testing
4823 multiple envelope elements, the last element determined the
4826 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4827 Electronic Mail") by including:
4829 Auto-submitted: auto-generated
4831 in the messages that it generates (bounce messages and others, such as
4832 warnings). In the case of bounce messages for non-SMTP messages, there was
4833 also a typo: it was using "Auto_submitted" (underscore instead of
4834 hyphen). Since every message generated by Exim is necessarily in response
4835 to another message, thes have all been changed to:
4837 Auto-Submitted: auto-replied
4839 in accordance with these statements in the RFC:
4841 The auto-replied keyword:
4843 - SHOULD be used on messages sent in direct response to another
4844 message by an automatic process,
4846 - MUST NOT be used on manually-generated messages,
4848 - MAY be used on Delivery Status Notifications (DSNs) and Message
4849 Disposition Notifications (MDNs),
4851 - MUST NOT be used on messages generated by automatic or periodic
4852 processes, except for messages which are automatic responses to
4855 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4856 to the default Received: header definition.
4858 PH/12 Added log selector acl_warn_skipped (default on).
4860 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4861 variables because (a) they are in the wrong storage pool and (b) even if
4862 they were copied, it wouldn't work properly because of the caching.
4864 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4865 checking when decoding. Apparently there are clients that generate
4866 overlong encoded strings. Why am I not surprised?
4868 PH/15 If the first argument of "${if match_address" was not empty, but did not
4869 contain an "@" character, Exim crashed. Now it writes a panic log message
4870 and treats the condition as false.
4872 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4874 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4875 extension "envelope-auth". The code is finished and in agreement with
4876 other implementations, but there is no documentation so far and in fact,
4877 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4878 not changing the active code.
4880 Print executed "if" and "elsif" statements when debugging is used. This
4881 helps a great deal to understand what a filter does.
4883 Document more things not specified clearly in RFC3028. I had all this
4884 sorted out, when out of a sudden new issues came to my mind. Oops."
4886 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4889 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4890 canonical form (as documented). However, after a host name lookup from
4891 the IP address, check_host() was doing a simple string comparison with
4892 addresses acquired from the DNS when checking that the found name did
4893 have the original IP as one of its addresses. Since any found IPv6
4894 addresses are likely to be in abbreviated form, the comparison could
4895 fail. Luckily, there already exists a function for doing the comparison
4896 by converting both addresses to binary, so now that is used instead of
4897 the text comparison.
4899 PH/20 There was another similar case to PH/19, when a complete host name was
4900 given in a host list; looking up its IP address could give an abbreviated
4901 form, whereas the current host's name might or might not be abbreviated.
4902 The same fix has been applied.
4908 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4909 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4912 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4913 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4915 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4917 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4918 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4919 Also, for "Auto-Submitted", treat anything other than "no" as
4920 non-personal, in accordance with RFC 3834. (Previously it treated
4921 anything starting "auto-" as non-personal.)
4923 TF/01 The control=submission/name=... option had a problem with syntax
4924 errors if the name included a slash character. The /name= option
4925 now slurps the rest of the string, so it can include any characters
4926 but it must come last in the list of options (after /sender_retain
4929 PH/05 Some modifications to the interface to the fake nameserver for the new
4937 TK/01 Added the "success_on_redirect" address verification option. See
4938 NewStuff for rationale and an example.
4940 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4942 PH/02 Patch to exigrep to allow it to work on syslog lines.
4944 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4945 fread() to skip over the body file's header line, because in Cygwin the
4946 header line is locked and is inaccessible.
4948 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4949 co-exist for some time) to make it clear that it is the Exim ID that is
4950 referenced, not the Message-ID: header line.
4952 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4953 string_format() function, because snprintf() does not exist on all
4956 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4957 ${stat: expansion item.
4959 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4960 protocol synchronization error", to keep the pedants happy.
4962 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4963 well as for IRIX systems, when gcc is being used. See the host.c source
4966 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4968 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4971 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4972 transport and to the smtp transport in LMTP mode.
4974 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4976 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4977 run a filter in a subprocess. This could lead to confusion in subsequent
4978 lookups in the parent process. There should also be a search_tidyup() at
4979 the end of the subprocess.
4981 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4982 only if the host matched helo_try_verify_hosts, which caused the
4983 verification to occur when the EHLO/HELO command was issued. The ACL just
4984 tested the remembered result. Now, if a previous verification attempt has
4985 not happened, "verify = helo" does it there and then.
4987 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4989 TK/03 Fix log output including CR from clamd.
4991 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4992 exist provoked a memory error which could cause a segfault.
4994 PH/15 Installed PCRE 6.2
4996 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4998 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4999 of the problem. Specifically, suggested +O2 rather than +O1 for the
5002 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5004 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5005 record, the port was not correctly logged when the outgoing_port log
5006 selector was set (it logged the transort's default port).
5008 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5009 fallback_hosts, and "hosts" in the smtp transport.
5011 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5012 host errors such as "Connection refused".
5014 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5015 authentication with radiusclient 0.4.9:
5017 - Error returned from rc_read_config was caught wrongly
5018 - Username/password not passed on to radius server due to wrong length.
5020 The presumption is that some radiusclient API changes for 4.51/PH/17
5021 were not taken care of correctly. The code is still untested by me (my
5022 Linux distribution still has 0.3.2 of radiusclient), but it was
5023 contributed by a Radius user.
5025 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5026 expanding the "port" option of the smtp transport.
5028 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5029 while reading a MIME header. Thanks to Tom Hughes for a patch.
5031 PH/24 Include config.h inside local_scan.h so that configuration settings are
5034 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5035 that in an ACL for RCPT (for example), you can examine exactly what was
5038 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5039 commands, but it was not correctly comparing the address with the actual
5040 client host address. Thus, it would show the EHLO address in Received:
5041 header lines when this was not necessary.
5043 PH/27 Added the % operator to ${eval:}.
5045 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5046 it should be ignoring failures (because with -C, for example, it has lost
5047 privilege). It wasn't ignoring creation failures other than "already
5050 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5053 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5054 because an input line was too long, either on its own, or by virtue of
5055 too many continuations, the temporary file was not being removed, and the
5056 return code was incorrect.
5058 PH/31 Missing "BOOL" in function definition in filtertest.c.
5060 PH/32 Applied Sieve patches from the maintainer.
5062 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5064 PH/33 Added "verify = not_blind".
5066 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5067 Local/Makefile (with some defaults set). These are used in built scripts
5068 such as exicyclog, but they have never been used in the exim_install
5069 script (though there are many overriding facilities there). I have
5070 arranged that the exim_install script now takes note of these two
5073 PH/35 Installed configuration files for Dragonfly.
5075 PH/36 When a locally submitted message by a trusted user did not contain a
5076 From: header, and the sender address was obtained from -f or from an SMTP
5077 MAIL command, and the trusted user did not use -F to supply a sender
5078 name, $originator_name was incorrectly used when constructing a From:
5079 header. Furthermore, $originator_name was used for submission mode
5080 messages from external hosts without From: headers in a similar way,
5081 which is clearly wrong.
5083 PH/37 Added control=suppress_local_fixups.
5085 PH/38 When log_selector = +received_sender was set, and the addition of the
5086 sender made the log line's construction buffer exactly full, or one byte
5087 less than full, an overflow happened when the terminating "\n" was
5090 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5091 when the result of a list match is failure because a DNS lookup failed.
5093 PH/40 RM_COMMAND is now used in the building process.
5095 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5096 the "build-* directories that it finds.
5098 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5099 address in a domain literal was a prefix of an interface address.
5101 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5102 when verifying a sender address, unless rewrite_headers is false.
5104 PH/44 Wrote a long comment about why errors_to addresses are verified as
5105 recipients, not senders.
5107 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5108 the ratelimit ACL was added.
5110 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5112 PH/46 Added extra information about PostgreSQL errors to the error string.
5114 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5115 avoiding the need to install special zones in a real server. This is
5116 backwards compatible; if it can't find the fake resolver, it drops back.
5117 Thus, both old and new test suites can be run.
5119 TF/02 Added util/ratelimit.pl
5121 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5122 clock is set back in time.
5124 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5125 Candler <B.Candler@pobox.com>.
5127 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5128 OK for addresses that are the result of redirections.
5130 PH/48 A number of further additions for the benefit of the new test suite,
5131 including a fake gethostbyname() that interfaces to the fake DNS resolver
5134 TF/06 The fix for widen_domains has also been applied to qualify_single and
5135 search_parents which are the other dnslookup options that can cause
5138 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5141 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5143 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5144 service" if it encountered an MX record with an empty target hostname.
5145 The message is now "an MX or SRV record indicated no SMTP service".
5147 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5148 if the DNS of the sending site is misconfigured. This is quite a
5149 common situation. This change restores the behaviour of treating a
5150 helo verification defer as a failure.
5152 PH/51 If self=fail was set on a router, the bounce message did not include the
5153 actual error message.
5159 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5161 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5162 command itself ended in error, the underlying message about the transport
5163 filter timeout was being overwritten with the pipe command error. Now the
5164 underlying error message should be appended to the second error message.
5166 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5168 PH/02 Reduce the amount of output that "make" produces by default. Full output
5169 can still be requested.
5171 PH/03 The warning log line about a condition test deferring for a "warn" verb
5172 was being output only once per connection, rather than after each
5173 occurrence (because it was using the same function as for successful
5174 "warn" verbs). This seems wrong, so I have changed it.
5176 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5177 it should not have, which might have caused a crash in the right
5178 circumstances, but probably never did.
5180 PH/04 Installed a modified version of Tony Finch's patch to make submission
5181 mode fix the return path as well as the Sender: header line, and to
5182 add a /name= option so that you can make the user's friendly name appear
5185 TF/03 Added the control = fakedefer ACL modifier.
5187 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5188 Mark Lowes for thorough testing.
5190 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5192 TK/03 Merged latest SRS patch from Miles Wilton.
5194 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5195 with the definition in sysexits.h (which is #included earlier).
5196 Fortunately, Exim does not actually use EX_OK. The code used to try to
5197 preserve the sysexits.h value, by assuming that macro definitions were
5198 scanned for macro replacements. I have been disabused of this notion,
5199 so now the code just undefines EX_OK before #including unistd.h.
5201 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5202 in the smtp transport. When a block could not be written in a single
5203 write() function, the timeout was being re-applied to each part-write.
5204 This seems wrong - if the receiver was accepting one byte at a time it
5205 would take for ever. The timeout is now adjusted when this happens. It
5206 doesn't have to be particularly precise.
5208 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5209 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5211 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5212 without a domain if the check to <postmaster@domain> fails.
5214 SC/01 Eximstats: added -xls and the ability to specify output files
5215 (patch written by Frank Heydlauf).
5217 SC/02 Eximstats: use FileHandles for outputting results.
5219 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5221 SC/04 Eximstats: fixed display of large numbers with -nvr option
5223 SC/05 Eximstats: fixed merging of reports with empty tables.
5225 SC/06 Eximstats: added the -include_original_destination flag
5227 SC/07 Eximstats: removed tabs and trailing whitespace.
5229 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5231 TK/06 MBOX spool code: Add real "From " MBOX separator line
5232 so the .eml file is really in mbox format (even though
5233 most programs do not really care). Patch from Alex Miller.
5235 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5236 The latter is generated from $received_to and is only set if the
5237 message has one envelope recipient. SA can use these headers,
5238 obviously out-of-the-box. Patch from Alex Miller.
5240 PH/08 The ${def test on a variable was returning false if the variable's
5241 value was "0", contrary to what the specification has always said!
5242 The result should be true unless the variable is empty.
5244 PH/09 The syntax error of a character other than { following "${if
5245 def:variable_name" (after optional whitespace) was not being diagnosed.
5246 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5247 accidental colon was present, for example, could give incorrect results.
5249 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5250 result is used (not including appendfile, where other changes are about
5253 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5254 This involved changing a lot of size variables from int to off_t. It
5255 should work with maildirs and everything.
5257 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5258 spamd dying while we are connected to it.
5260 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5263 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5264 function for BDB 4.3.
5266 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5268 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5269 the sources for PCRE have been re-arranged and more files are now
5272 PH/15 The code I had for printing potentially long long variables in PH/11
5273 above was not the best (it lost precision). The length of off_t variables
5274 is now inspected at build time, and an appropriate printing format (%ld
5275 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5276 to be "long long int" or "long int". This is needed for the internal
5277 formatting function string_vformat().
5279 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5280 the configuration file to be ":syslog", then the script "guesses" where
5281 the logs files are, rather than using the compiled in default. In our
5282 case the guess is not the same as the compiled default, so the script
5283 suddenly stopped working when I started to use syslog. The patch checks
5284 to see if log_file_path is "". If so, it attempts to read it from exim
5285 with no configuration file to get the compiled in version, before it
5286 falls back to the previous guessing code."
5288 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5289 implementing BATV in an Exim configuration. See NewStuff for the gory
5292 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5293 Makefile that are specific to HP-UX.
5295 PH/18 If the "use_postmaster" option was set for a recipient callout together
5296 with the "random" option, the postmaster address was used as the MAIL
5297 FROM address for the random test, but not for the subsequent recipient
5298 test. It is now used for both.
5300 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5301 patch removes a few documentation additions to RFC 3028, because the
5302 latest draft now contains them. It adds the new en;ascii-case comparator
5303 and a new error check for 8bit text in MIME parts. Comparator and
5304 require names are now matched exactly. I enabled the subaddress
5305 extension, but it is not well tested yet (read: it works for me)."
5307 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5308 rework some of the code of TK/09 above to avoid the hardwired use of
5309 "%lld" and "long long". Replaced the call to snprintf() with a call to
5312 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5313 records point to non-existent hosts", "retry timeout exceeded", and
5314 "retry time not reached for any host after a long failure period".
5316 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5317 experimental DomainKeys support:
5319 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5320 (2) On an error such as an illegally used "control", the wrong name for
5321 the control was given.
5323 These problems did NOT occur unless DomainKeys support was compiled.
5325 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5327 PH/24 Added ${if match_ip condition.
5329 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5330 databases so that it will be absolutely obvious if a crash occurs in the
5331 DB library. This is a regular occurrence (often caused by mis-matched
5334 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5335 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5336 picked up on a user's system that detects such things. There doesn't seem
5337 to be a gcc warning option for this - only an attribute that has to be
5338 put on the function's prototype. It seems that in Fedora Core 4 they have
5339 set this on a number of new functions. No doubt there will be more in due
5342 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5343 specify a transport. However, if an address that was verified by such a
5344 router was the subject of a callout, Exim crashed because it tried to
5345 read the rcpt_include_affixes from the non-existent transport. Now it
5346 just assumes that the setting of that option is false. This bug was
5347 introduced by 4.51/PH/31.
5349 PH/28 Changed -d+all to exclude +memory, because that information is very
5350 rarely of interest, but it makes the output a lot bigger. People tend to
5351 do -d+all out of habit.
5353 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5354 code in os-type was giving problems when libc.so lives in lib64, like on
5357 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5358 aren't the modern standard, and it seems that some systems' include files
5359 don't always have them. Exim was already checking for some of the newer
5360 ones like T_AAAA, and defining it itself. I've added checks for all the
5361 record types that Exim uses.
5363 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5364 not automatically generating a new one, as it is supposed to. This
5365 prevented TLS from working. If the file did exist, but contained invalid
5366 data, a new version was generated, as expected. It was only the case of a
5367 non-existent file that was broken.
5369 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5370 with a change in libdomainkeys > 0.64.
5372 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5373 from DNS. If the selector record carries the flag, it now has
5374 precedence over the domain-wide flag.
5376 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5378 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5379 the use of a port name that isn't defined in /etc/services) occurred, the
5380 message was deferred as in a normal delivery, and thus remained on the
5381 spool, instead of being failed because of the mua_wrapper setting. This
5382 is now fixed, and I tidied up some of the mua_wrapper messages at the
5385 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5386 the messages in a hash of arrays rather than using individual hashes.
5387 This is a bit cleaner and results in dramatic memory savings, albeit
5388 at a slight CPU cost.
5390 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5391 as requested by Marc Sherman.
5393 SC/10 Eximstats: added histograms for user specified patterns as requested
5396 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5398 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5399 fopen() in the content-scanning modules that did not already have it.
5405 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5406 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5408 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5410 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5412 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5413 to test Sieve filters that use "vacation".
5415 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5416 that changes the way the GnuTLS parameters are stored in the cache file.
5417 The new format can be generated externally. For backward compatibility,
5418 if the data in the cache doesn't make sense, Exim assumes it has read an
5419 old-format file, and it generates new data and writes a new file. This
5420 means that you can't go back to an older release without removing the
5423 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5424 work if there are any delivery delays because "one_time" forces the
5425 parent to be marked "delivered", so its unseen clone is never tried
5426 again. For this reason, Exim now forbids the simultaneous setting of
5429 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5430 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5431 entry if you want to know the details. The fix, however, neglected to
5432 consider the case when local delivery batching is involved. The test for
5433 "previously delivered" was not happening when checking to see if an
5434 address could be batched with a previous (undelivered) one; under
5435 certain circumstances this could lead to multiple deliveries to the same
5438 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5439 in its include files, and this causes problems building Exim.
5441 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5442 header_syntax) but Exim was just ignoring anything given after a slash.
5443 In particular, this caused confusion with an attempt to use "verify =
5444 reverse_host_lookup/defer_ok". An error is now given when options are
5445 supplied for verify items that do not have them. (Maybe reverse_host_
5446 lookup should have a defer_ok option, but that's a different point.)
5448 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5449 defined by RFC 821) to 2048, because there were problems with some AUTH
5450 commands, and RFC 1869 says the size should be increased for extended
5451 SMTP commands that take arguments.
5453 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5456 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5457 "unknown" error; now it says that the functionality isn't in the binary.
5459 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5460 an address' error message when a string expansion fails (syntax or
5461 whatever). Otherwise the password may appear in the log. Following change
5462 PH/42 below, there is no longer a chance of it appearing in a bounce
5465 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5467 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5468 of its addresses was ever tried. (Bugzilla bug #2.)
5470 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5471 the result incorrectly in the debug output. (It correctly added a newline
5472 to what was transported.)
5474 TF/01 Added $received_time.
5476 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5477 commented out examples of how to interface to a virus scanner and to
5478 SpamAssassin. Also added commented examples of av_scanner and
5479 spamd_address settings.
5481 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5482 and controls are allowed in which ACLs. There were a couple of minor
5483 errors. Some of the entries in the conditions table (which is a table of
5484 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5485 negation of where the condition IS allowed.
5487 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5489 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5490 header file does not have a version number, so I've had to invent a new
5491 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5492 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5493 radiusclient), but it was contributed by a Radius user.
5495 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5496 files or directories, for OpenSSL.
5498 PH/19 When an Exim process that is running as root has to create an Exim log
5499 file, it does so in a subprocess that runs as exim:exim so as to get the
5500 ownership right at creation (otherwise, other Exim processes might see
5501 the file with the wrong ownership). There was no test for failure of this
5502 fork() call, which would lead to the process getting stuck as it waited
5503 for a non-existent subprocess. Forks do occasionally fail when resources
5504 run out. I reviewed all the other calls to fork(); they all seem to check
5507 PH/20 When checking for unexpected SMTP input at connect time (before writing
5508 the banner), Exim was not dealing correctly with a non-positive return
5509 from the read() function. If the client had disconnected by this time,
5510 the result was a log entry for a synchronization error with an empty
5511 string after "input=" when read() returned zero. If read() returned -1
5512 (an event I could not check), uninitialized data bytes were printed.
5513 There were reports of junk text (parts of files, etc) appearing after
5516 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5518 PH/22 Added support for macro redefinition, and (re)definition in between
5519 driver and ACL definitions.
5521 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5522 forgetting to use the resulting value; it was using the unexpanded value.
5524 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5525 hadn't been configured. The fix is from Juergen Kreileder, who
5526 understands it better than I do:
5528 "Here's what I see happening with three configured cyrus_sasl
5529 authenticators configured (plain, login, cram-md5):
5531 On startup auth_cyrus_sasl_init() gets called for each of these.
5532 This means three calls to sasl_listmech() without a specified mech_list.
5533 => SASL tests which mechs of all available mechs actually work
5534 => three warnings about OTP not working
5535 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5537 With the patch, sasl_listmech() also gets called three times. But now
5538 SASL's mech_list option is set to the server_mech specified in the the
5539 authenticator. Or in other words, the answer from sasl_listmech()
5540 gets limited to just the mech you're testing for (which is different
5542 => the return list contains just 'plain' or 'login', 'cram-md5' or
5543 nothing depending on the value of ob->server_mech.
5545 I've just tested the patch: Authentication still works fine,
5546 unavailable mechs specified in the exim configuration are still
5547 caught, and the auth.log warnings about OTP are gone."
5549 PH/25 When debugging is enabled, the contents of the command line are added
5550 to the debugging output, even when log_selector=+arguments is not
5553 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5554 answer is "GNU", and only if the return is "GNU/something" is the answer
5557 PH/27 $acl_verify_message is now set immediately after the failure of a
5558 verification in an ACL, and so is available in subsequent modifiers. In
5559 particular, the message can be preserved by coding like this:
5561 warn !verify = sender
5562 set acl_m0 = $acl_verify_message
5564 Previously, $acl_verify_message was set only while expanding "message"
5565 and "log_message" when a very denied access.
5567 PH/28 Modified OS/os.c-Linux with
5569 -#ifndef OS_LOAD_AVERAGE
5570 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5572 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5573 nomenclature these days.)
5575 PH/29 Installed patch from the Sieve maintainer that adds the options
5576 sieve_useraddress and sieve_subaddress to the redirect router.
5578 PH/30 In these circumstances:
5579 . Two addresses routed to the same list of hosts;
5580 . First host does not offer TLS;
5581 . First host accepts first address;
5582 . First host gives temporary error to second address;
5583 . Second host offers TLS and a TLS session is established;
5584 . Second host accepts second address.
5585 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5586 and peerdn, if requested) that were in fact used only for the second
5589 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5590 attention to any local part prefix or suffix that was matched by the
5591 router that accepted the address. It now behaves in the same way as it
5592 does for delivery: the affixes are removed from the local part unless
5593 rcpt_include_affixes is set on the transport.
5595 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5596 timeout during the DATA phase of an incoming message.
5598 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5599 applied a patch sanctioned by the Sieve maintainer.
5601 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5602 the uid or gid is negative. A case of a negative gid caused this to be
5603 noticed. The fix allows for either to be negative.
5605 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5606 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5609 PH/36 The change PH/12 above was broken. Fixed it.
5611 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5612 the grounds that routing the same address twice would always produce the
5613 same answer. This might have been true once, but it is certainly no
5614 longer true now. Routing a child address may depend on the previous
5615 routing that produced that child. Some complicated redirection strategies
5616 went wrong when messages had multiple recipients, and made Exim's
5617 behaviour dependent on the order in which the addresses were given.
5619 I have moved the duplicate checking until after the routing is complete.
5620 Exim scans the addresses that are assigned to local and remote
5621 transports, and removes any duplicates. This means that more work will be
5622 done, as duplicates will always all be routed, but duplicates are
5623 presumably rare, so I don't expect this is of any significance.
5625 For deliveries to pipes, files, and autoreplies, the duplicate checking
5626 still happens during the routing process, since they are not going to be
5629 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5630 It corrects a timeout issue with spamd. This is Ian's comment: "The
5631 background is that sometimes spamd either never reads data from a
5632 connection it has accepted, or it never writes response data. The exiscan
5633 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5634 blindly assumes that writes won't block so it may never time out."
5636 PH/39 Allow G after quota size as well as K and M.
5638 PH/40 The value set for $authenticated_id in an authenticator may not contain
5639 binary zeroes or newlines because the value is written to log lines and
5640 to spool files. There was no check on this. Now the value is run through
5641 the string_printing() function so that such characters are converted to
5642 printable escape sequences.
5644 PH/41 $message_linecount is a new variable that contains the total number of
5645 lines in the message. Compare $body_linecount, which is the count for the
5648 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5649 bounce and delay warning messages, except in certain special cases, which
5652 (a) An SMTP error message from a remote host;
5653 (b) A message specified in a :fail: redirection;
5654 (c) A message specified in a "fail" command in a system filter;
5655 (d) A message specified in a FAIL return from the queryprogram router;
5656 (e) A message specified by the cannot_route_message router option.
5658 In these cases only, Exim does include the error details in bounce and
5659 warning messages. There are also a few cases where bland messages such
5660 as "unrouteable address" or "local delivery error" are given.
5662 PH/43 $value is now also set for the "else" part of a ${run expansion.
5664 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5665 being worked on, but at least Exim now implements the latest version to
5668 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5669 process to complete was treated as a delivery failure, a timeout while
5670 writing the message to the pipe was logged, but erroneously treated as a
5671 successful delivery. Such timeouts include transport filter timeouts. For
5672 consistency with the overall process timeout, these timeouts are now
5673 treated as errors, giving rise to delivery failures by default. However,
5674 there is now a new Boolean option for the pipe transport called
5675 timeout_defer, which, if set TRUE, converts the failures into defers for
5676 both kinds of timeout. A transport filter timeout is now identified in
5679 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5680 systems where "make" and "gmake" are different, calling "gmake" at top
5681 level broke things. I've arranged for the value of $(MAKE) to be passed
5682 from the Makefile to this script so that it can call the same version of
5686 A note about Exim versions 4.44 and 4.50
5687 ----------------------------------------
5689 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5690 changes of various kinds. As a consequence, a big documentation update was
5691 needed. This delayed the release for rather longer than seemed good, especially
5692 in the light of a couple of (minor) security issues. Therefore, the changes
5693 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5694 release. So 4.44 and 4.50 are in effect two different branches that both start
5697 I have left the 4.50 change log unchanged; it contains all the changes since
5698 4.43. The change log for 4.44 is below; many of its items are identical to
5699 those for 4.50. This seems to be the most sensible way to preserve the
5700 historical information.
5706 1. Minor wording change to the doc/README.SIEVE file.
5708 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5709 computation of the current number of files was incorrect.
5711 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5712 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5715 4. Give more explanation in the error message when the command for a transport
5716 filter fails to execute.
5718 5. There are several places where Exim runs a non-Exim command in a
5719 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5720 was being done only for the command run by the queryprogram router. It is
5721 now done for all such subprocesses. The other cases are: ${run, transport
5722 filters, and the commands run by the lmtp and pipe transports.
5724 6. Added CONFIGURE_GROUP build-time option.
5726 7. Some older OS have a limit of 256 on the maximum number of file
5727 descriptors. Exim was using setrlimit() to set 1000 as a large value
5728 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5729 systems. I've change it so that if it can't get 1000, it tries for 256.
5731 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5732 was an oversight, and furthermore, ever since the addition of extra
5733 controls (e.g. 4.43/32), the checks on when to allow different forms of
5734 "control" were broken. There should now be diagnostics for all cases when a
5735 control that does not make sense is encountered.
5737 9. Added the /retain_sender option to "control=submission".
5739 10. $recipients is now available in the predata ACL (oversight).
5741 11. Tidy the search cache before the fork to do a delivery from a message
5742 received from the command line. Otherwise the child will trigger a lookup
5743 failure and thereby defer the delivery if it tries to use (for example) a
5744 cached ldap connection that the parent has called unbind on.
5746 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5747 of $address_data from the recipient verification was clobbered by the
5748 sender verification.
5750 13. The value of address_data from a sender verification is now available in
5751 $sender_address_data in subsequent conditions in the ACL statement.
5753 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5755 15. Added a new option "connect=<time>" to callout options, to set a different
5758 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5759 was its contents. (It was OK if the option was not defined at all.)
5761 17. A "Completed" log line is now written for messages that are removed from
5762 the spool by the -Mrm option.
5764 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5765 information about exactly what failed.
5767 19. Added -dd to debug only the daemon process.
5769 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5770 handles timeouts, both on the server side and network timeouts. Renamed the
5771 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5773 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5774 It is now set to "smtps".
5776 22. $host_address is now set to the target address during the checking of
5777 ignore_target_hosts.
5779 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5780 being passed; this would have caused $sender_host_name to have been used if
5781 matching the list had actually called for a host name (not very likely,
5782 since this list is usually IP addresses). A host name is now passed as
5785 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5786 code that specifies a non-restarting handler (typically sigaction() in
5787 modern systems) in an attempt to fix a rare and obscure crash bug.
5789 25. Narrowed the window for a race in the daemon that could cause it to ignore
5790 SIGCHLD signals. This is not a major problem, because they are used only to
5791 wake it up if nothing else does.
5793 26. A malformed maildirsize file could cause Exim to calculate negative values
5794 for the mailbox size or file count. Odd effects could occur as a result.
5795 The maildirsize information is now recalculated if the size or filecount
5798 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5799 support for a long time. Removed HAVE_SYS_VFS_H.
5801 28. Installed the latest version of exipick from John Jetmore.
5803 29. In an address list, if the pattern was not a regular expression, an empty
5804 subject address (from a bounce message) matched only if the pattern was an
5805 empty string. Non-empty patterns were not even tested. This was the wrong
5806 because it is perfectly reasonable to use an empty address as part of a
5807 database query. An empty address is now tested by patterns that are
5808 lookups. However, all the other forms of pattern expect the subject to
5809 contain a local part and a domain, and therefore, for them, an empty
5810 address still always fails if the pattern is not itself empty.
5812 30. Exim went into a mad DNS loop when attempting to do a callout where the
5813 host was specified on an smtp transport, and looking it up yielded more
5814 than one IP address.
5816 31. Re-factored the code for checking spool and log partition space into a
5817 function that finds that data and another that does the check. The former
5818 is then used to implement four new variables: $spool_space, $log_space,
5819 $spool_inodes, and $log_inodes.
5821 32. The RFC2047 encoding function was originally intended for short strings
5822 such as real names; it was not keeping to the 75-character limit for
5823 encoded words that the RFC imposes. It now respects the limit, and
5824 generates multiple encoded words if necessary. To be on the safe side, I
5825 have increased the buffer size for the ${rfc2047: expansion operator from
5828 33. It is now permitted to omit both strings after an "if" condition; if the
5829 condition is true, the result is "true". As before, when the second string
5830 is omitted, a false condition yields an empty string. This makes it less
5831 cumbersome to write custom ACL and router conditions.
5833 34. Failure to deliver a bounce message always caused it to be frozen, even if
5834 there was an errors_to setting on the router. The errors_to setting is now
5837 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5838 canonical form (fully expanded) before being placed in
5839 $sender_host_address.
5841 36. The table in the code that translates DNS record types into text (T_A to
5842 "A" for instance) was missing entries for NS and CNAME. It is just possible
5843 that this could have caused confusion if both these types were looked up
5844 for the same domain, because the text type is used as part of Exim's
5845 per-process caching. But the chance of anyone hitting this buglet seems
5848 37. The dnsdb lookup has been extended in a number of ways.
5850 (1) There is a new type, "zns", which walks up the domain tree until it
5851 finds some nameserver records. It should be used with care.
5853 (2) There is a new type, "mxh", which is like "mx" except that it returns
5854 just the host names, not the priorities.
5856 (3) It is now possible to give a list of domains (or IP addresses) to be
5857 looked up. The behaviour when one of the lookups defers can be
5858 controlled by a keyword.
5860 (4) It is now possible to specify the separator character for use when
5861 multiple records are returned.
5863 38. The dnslists ACL condition has been extended: it is now possible to supply
5864 a list of IP addresses and/or domains to be looked up in a particular DNS
5867 39. Added log_selector=+queue_time_overall.
5869 40. When running the queue in the test harness, wait just a tad after forking a
5870 delivery process, to get repeatability of debugging output.
5872 41. Include certificate and key file names in error message when GnuTLS fails
5873 to set them up, because the GnuTLS error message doesn't include the name
5874 of the failing file when there is a problem reading it.
5876 42. Allow both -bf and -bF in the same test run.
5878 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5880 44. The "Exiscan patch" is now merged into the mainline Exim source.
5882 45. Sometimes the final signoff response after QUIT could fail to get
5883 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5884 < 0 before doing a fflush(). This bug looks as though it goes back to the
5885 introduction of TLS in release 3.20, but "sometimes" must have been rare
5886 because the tests only now provoked it.
5888 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5889 (this can affect the format of dates).
5891 47. exim_tidydb, when checking for the continued existence of a message for
5892 which it has found a message-specific retry record, was not finding
5893 messages that were in split spool directories. Consequently, it was
5894 deleting retry records that should have stayed in existence.
5896 48. Steve fixed some bugs in eximstats.
5898 49. The SPA authentication driver was not abandoning authentication and moving
5899 on to the next authenticator when an expansion was forced to fail,
5900 contradicting the general specification for all authenticators. Instead it
5901 was generating a temporary error. It now behaves as specified.
5903 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5904 (the order specifies the preference for clients). The order is now AES256,
5905 AES128, 3DES, ARCFOUR128.
5907 51. Small patch to Sieve code - explicitly set From: when generating an
5910 52. Exim crashed if a remote delivery caused a very long error message to be
5911 recorded - for instance if somebody sent an entire SpamAssassin report back
5912 as a large number of 550 error lines. This bug was coincidentally fixed by
5913 increasing the size of one of Exim's internal buffers (big_buffer) that
5914 happened as part of the Exiscan merge. However, to be on the safe side, I
5915 have made the code more robust (and fixed the comments that describe what
5918 53. Now that there can be additional text after "Completed" in log lines (if
5919 the queue_time_overall log selector is set), a one-byte patch to exigrep
5920 was needed to allow it to recognize "Completed" as not the last thing in
5923 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5924 patch that reportedly fixes this has been added. I am not expert enough to
5925 create a test for it. This is what the patch creator wrote:
5927 "I found a little strange behaviour of ldap code when working with
5928 Windows 2003 AD Domain, where users was placed in more than one
5929 Organization Units. When I tried to give exim partial DN, the exit code
5930 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5931 But simultaneously result of request was absolutely normal ldap result,
5932 so I produce this patch..."
5934 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5935 REFERENCE, so I have modified the code to exclude the patch when that macro
5938 55. Some experimental protocols are using DNS PTR records for new purposes. The
5939 keys for these records are domain names, not reversed IP addresses. The
5940 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5941 leaves it alone. Component reversal etc. now happens only for IP addresses.
5944 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5946 57. Double the size of the debug message buffer (to 2048) so that more of very
5947 long debug lines gets shown.
5949 58. The exicyclog utility now does better if the number of log files to keep
5950 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5952 59. Two changes related to the smtp_active_hostname option:
5954 (1) $smtp_active_hostname is now available as a variable.
5955 (2) The default for smtp_banner uses $smtp_active_hostname instead
5956 of $primary_hostname.
5958 60. The host_aton() function is supposed to be passed a string that is known
5959 to be a valid IP address. However, in the case of IPv6 addresses, it was
5960 not checking this. This is a hostage to fortune. Exim now panics and dies
5961 if the condition is not met. A case was found where this could be provoked
5962 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5963 components; fortuitously, this particular loophole had already been fixed
5964 by change 4.50/55 above.
5966 If there are any other similar loopholes, the new check in host_aton()
5967 itself should stop them being exploited. The report I received stated that
5968 data on the command line could provoke the exploit when Exim was running as
5969 exim, but did not say which command line option was involved. All I could
5970 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5971 running as the user.
5974 61. There was a buffer overflow vulnerability in the SPA authentication code
5975 (which came originally from the Samba project). I have added a test to the
5976 spa_base64_to_bits() function which I hope fixes it.
5979 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5980 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5982 63. The daemon start-up calls getloadavg() while still root for those OS that
5983 need the first call to be done as root, but it missed one case: when
5984 deliver_queue_load_max is set with deliver_drop_privilege. This is
5985 necessary for the benefit of the queue runner, because there is no re-exec
5986 when deliver_drop_privilege is set.
5988 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5989 This has been fixed.
5991 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5992 was in use, was not putting the data itself into the right store pool;
5993 consequently, it could be overwritten for a subsequent message in the same
5994 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5997 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5999 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6000 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6001 the function were treating the return as a boolean value, which happened to
6002 work because 0=false and not-0=true, but is not correct code.
6004 68. The host_aton() function was not handling scoped IPv6 addresses (those
6005 with, for example, "%eth0" on the end) correctly.
6007 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6008 negated items (that is, ~something) in unsigned ints. Some compilers
6009 apparently mutter when there is no cast.
6011 70. If an address verification called from an ACL failed, and did not produce a
6012 user-specific message (i.e. there was only a "system" message), nothing was
6013 put in $acl_verify_message. In this situation, it now puts the system
6016 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6017 session; change 4.31/43 added the unwanted input to the log line - except
6018 that it did not do this in the start of session case. It now does.
6020 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6021 This is wrong and can cause the other end to generate a synchronization
6022 error if it is another Exim or anything else that does the synchronization
6023 check. A QUIT command is no longer sent after a timeout.
6025 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6026 during host lookups.
6028 74. The defer_ok option of callout verification was not working if it was used
6029 when verifying addresses in header lines, that is, for this case:
6031 verify = header_sender/callout=defer_ok
6033 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6034 those file descriptors could be used for SMTP connections. If anything
6035 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6036 could be sent to the SMTP client, causing chaos. The daemon now opens
6037 stdin, stdout, and stderr to /dev/null when it puts itself into the
6040 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6041 log by default. The user can override this with suitable Perl magic.
6043 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6044 the log message when discard triggers, was not working for the DATA ACL or
6045 for the non-SMTP ACL.
6047 78. Error message wording change in sieve.c.
6049 79. If smtp_accept_max_per_host was set, the number of connections could be
6050 restricted to fewer than expected, because the daemon was trying to set up
6051 a new connection before checking whether the processes handling previous
6052 connections had finished. The check for completed processes is now done
6053 earlier. On busy systems, this bug wouldn't be noticed because something
6054 else would have woken the daemon, and it would have reaped the completed
6057 80. If a message was submitted locally by a user whose login name contained one
6058 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6059 It caused a spool format error. I have fixed the spool reading code. A
6060 related problem was that the "from" clause in the Received: line became
6061 illegal because of the space(s). It is now covered by ${quote_local_part.
6063 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6066 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6068 83. Patch from Sieve maintainer to fix unterminated string problem in
6069 "vacation" handling.
6071 84. Some minor changes to the Linux configuration files to help with other
6072 OS variants using glibc.
6074 85. One more patch for Sieve to update vacation handling to latest spec.
6077 ----------------------------------------------------
6078 See the note above about the 4.44 and 4.50 releases.
6079 ----------------------------------------------------
6085 1. Change 4.43/35 introduced a bug that caused file counts to be
6086 incorrectly computed when quota_filecount was set in an appendfile
6089 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6090 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6093 3. Give more explanation in the error message when the command for a transport
6094 filter fails to execute.
6096 4. There are several places where Exim runs a non-Exim command in a
6097 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6098 was being done only for the command run by the queryprogram router. It is
6099 now done for all such subprocesses. The other cases are: ${run, transport
6100 filters, and the commands run by the lmtp and pipe transports.
6102 5. Some older OS have a limit of 256 on the maximum number of file
6103 descriptors. Exim was using setrlimit() to set 1000 as a large value
6104 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6105 systems. I've change it so that if it can't get 1000, it tries for 256.
6107 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6108 was an oversight, and furthermore, ever since the addition of extra
6109 controls (e.g. 4.43/32), the checks on when to allow different forms of
6110 "control" were broken. There should now be diagnostics for all cases when a
6111 control that does not make sense is encountered.
6113 7. $recipients is now available in the predata ACL (oversight).
6115 8. Tidy the search cache before the fork to do a delivery from a message
6116 received from the command line. Otherwise the child will trigger a lookup
6117 failure and thereby defer the delivery if it tries to use (for example) a
6118 cached ldap connection that the parent has called unbind on.
6120 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6121 of $address_data from the recipient verification was clobbered by the
6122 sender verification.
6124 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6125 was its contents. (It was OK if the option was not defined at all.)
6127 11. A "Completed" log line is now written for messages that are removed from
6128 the spool by the -Mrm option.
6130 12. $host_address is now set to the target address during the checking of
6131 ignore_target_hosts.
6133 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6134 being passed; this would have caused $sender_host_name to have been used if
6135 matching the list had actually called for a host name (not very likely,
6136 since this list is usually IP addresses). A host name is now passed as
6139 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6140 code that specifies a non-restarting handler (typically sigaction() in
6141 modern systems) in an attempt to fix a rare and obscure crash bug.
6143 15. Narrowed the window for a race in the daemon that could cause it to ignore
6144 SIGCHLD signals. This is not a major problem, because they are used only to
6145 wake it up if nothing else does.
6147 16. A malformed maildirsize file could cause Exim to calculate negative values
6148 for the mailbox size or file count. Odd effects could occur as a result.
6149 The maildirsize information is now recalculated if the size or filecount
6152 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6153 support for a long time. Removed HAVE_SYS_VFS_H.
6155 18. Updated exipick to current release from John Jetmore.
6157 19. Allow an empty sender to be matched against a lookup in an address list.
6158 Previously the only cases considered were a regular expression, or an
6161 20. Exim went into a mad DNS lookup loop when doing a callout where the
6162 host was specified on the transport, if the DNS lookup yielded more than
6165 21. The RFC2047 encoding function was originally intended for short strings
6166 such as real names; it was not keeping to the 75-character limit for
6167 encoded words that the RFC imposes. It now respects the limit, and
6168 generates multiple encoded words if necessary. To be on the safe side, I
6169 have increased the buffer size for the ${rfc2047: expansion operator from
6172 22. Failure to deliver a bounce message always caused it to be frozen, even if
6173 there was an errors_to setting on the router. The errors_to setting is now
6176 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6177 canonical form (fully expanded) before being placed in
6178 $sender_host_address.
6180 24. Updated eximstats to version 1.33
6182 25. Include certificate and key file names in error message when GnuTLS fails
6183 to set them up, because the GnuTLS error message doesn't include the name
6184 of the failing file when there is a problem reading it.
6186 26. Expand error message when OpenSSL has problems setting up cert/key files.
6189 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6190 (this can affect the format of dates).
6192 28. exim_tidydb, when checking for the continued existence of a message for
6193 which it has found a message-specific retry record, was not finding
6194 messages that were in split spool directories. Consequently, it was
6195 deleting retry records that should have stayed in existence.
6197 29. eximstats updated to version 1.35
6198 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6199 1.35 - bugfix such that pie charts by volume are generated correctly
6201 30. The SPA authentication driver was not abandoning authentication and moving
6202 on to the next authenticator when an expansion was forced to fail,
6203 contradicting the general specification for all authenticators. Instead it
6204 was generating a temporary error. It now behaves as specified.
6206 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6207 (the order specifies the preference for clients). The order is now AES256,
6208 AES128, 3DES, ARCFOUR128.
6210 31. Small patch to Sieve code - explicitly set From: when generating an
6213 32. Exim crashed if a remote delivery caused a very long error message to be
6214 recorded - for instance if somebody sent an entire SpamAssassin report back
6215 as a large number of 550 error lines. This bug was coincidentally fixed by
6216 increasing the size of one of Exim's internal buffers (big_buffer) that
6217 happened as part of the Exiscan merge. However, to be on the safe side, I
6218 have made the code more robust (and fixed the comments that describe what
6221 33. Some experimental protocols are using DNS PTR records for new purposes. The
6222 keys for these records are domain names, not reversed IP addresses. The
6223 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6224 leaves it alone. Component reversal etc. now happens only for IP addresses.
6227 34. The host_aton() function is supposed to be passed a string that is known
6228 to be a valid IP address. However, in the case of IPv6 addresses, it was
6229 not checking this. This is a hostage to fortune. Exim now panics and dies
6230 if the condition is not met. A case was found where this could be provoked
6231 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6232 components; fortuitously, this particular loophole had already been fixed
6233 by change 4.50/55 or 4.44/33 above.
6235 If there are any other similar loopholes, the new check in host_aton()
6236 itself should stop them being exploited. The report I received stated that
6237 data on the command line could provoke the exploit when Exim was running as
6238 exim, but did not say which command line option was involved. All I could
6239 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6240 running as the user.
6243 35. There was a buffer overflow vulnerability in the SPA authentication code
6244 (which came originally from the Samba project). I have added a test to the
6245 spa_base64_to_bits() function which I hope fixes it.
6248 36. The daemon start-up calls getloadavg() while still root for those OS that
6249 need the first call to be done as root, but it missed one case: when
6250 deliver_queue_load_max is set with deliver_drop_privilege. This is
6251 necessary for the benefit of the queue runner, because there is no re-exec
6252 when deliver_drop_privilege is set.
6254 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6255 was in use, was not putting the data itself into the right store pool;
6256 consequently, it could be overwritten for a subsequent message in the same
6257 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6260 38. Sometimes the final signoff response after QUIT could fail to get
6261 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6262 < 0 before doing a fflush(). This bug looks as though it goes back to the
6263 introduction of TLS in release 3.20, but "sometimes" must have been rare
6264 because the tests only now provoked it.
6270 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6271 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6272 Now it returns an integer. A number of calls were still expecting a T/F
6273 return. Fortuitously, in all cases, the tests worked in OK situations,
6274 which is the norm. However, things would have gone wrong on any write
6275 failures on the smtp file descriptor. This function is used when sending
6276 messages over SMTP and also when doing verify callouts.
6278 2. When Exim is called to do synchronous delivery of a locally submitted
6279 message (the -odf or -odi options), it no longer closes stderr before doing
6282 3. Implemented the mua_wrapper option.
6284 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6286 5. Implemented the functions header_remove(), header_testname(),
6287 header_add_at_position(), and receive_remove_recipient(), and exported them
6290 6. If an ACL "warn" statement specified the addition of headers, Exim already
6291 inserted X-ACL-Warn: at the start if there was no header name. However, it
6292 was not making this test for the second and subsequent header lines if
6293 there were newlines in the string. This meant that an invalid header could
6294 be inserted if Exim was badly configured.
6296 7. Allow an ACL "warn" statement to add header lines at the start or after all
6297 the Received: headers, as well as at the end.
6299 8. Added the rcpt_4xx retry error code.
6301 9. Added postmaster_mailfrom=xxx to callout verification option.
6303 10. Added mailfrom=xxxx to the callout verification option, for verify=
6306 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6307 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6309 12. Inserted some casts to stop certain compilers warning when using pointer
6310 differences as field lengths or precisions in printf-type calls (mostly
6311 affecting debugging statements).
6313 13. Added optional readline() support for -be (dynamically loaded).
6315 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6316 same clock tick as a message's arrival, so that its received time was the
6317 same as the "first fail" time on the retry record, and that message
6318 remained on the queue past the ultimate address timeout, every queue runner
6319 would try a delivery (because it was past the ultimate address timeout) but
6320 after another failure, the ultimate address timeout, which should have then
6321 bounced the address, did not kick in. This was a "< instead of <=" error;
6322 in most cases the first failure would have been in the next clock tick
6323 after the received time, and all would be well.
6325 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6326 being recognized when the domain list was tested by the match_domain
6327 condition in an expansion string.
6329 16. Added the ${str2b64: operator.
6331 17. Exim was always calling setrlimit() to set a large limit for the number of
6332 processes, without checking whether the existing limit was already
6333 adequate. (It did check for the limit on file descriptors.) Furthermore,
6334 errors from getrlimit() and setrlimit() were being ignored. Now they are
6335 logged to the main and panic logs, but Exim does carry on, to try to do its
6336 job under whatever limits there are.
6338 18. Imported PCRE 5.0.
6340 19. Trivial typo in log message " temporarily refused connection" (the leading
6343 20. If the log selector return_path_on_delivery was set and an address was
6344 redirected to /dev/null, the delivery process crashed because it assumed
6345 that a return path would always be set for a "successful" delivery. In this
6346 case, the whole delivery is bypassed as an optimization, and therefore no
6349 21. Internal re-arrangement: the function for sending a challenge and reading
6350 a response while authentication was assuming a zero-terminated challenge
6351 string. It's now changed to take a pointer and a length, to allow for
6352 binary data in such strings.
6354 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6356 23. Exim was not respecting finduser_retries when seeking the login of the
6357 uid under which it was called; it was always trying 10 times. (The default
6358 setting of finduser_retries is zero.) Also, it was sleeping after the final
6359 failure, which is pointless.
6361 24. Implemented tls_on_connect_ports.
6363 25. Implemented acl_smtp_predata.
6365 26. If the domain in control=submission is set empty, Exim assumes that the
6366 authenticated id is a complete email address when it generates From: or
6367 Sender: header lines.
6369 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6370 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6371 chown and chgrp in /bin and hostname in /usr/bin.
6373 28. Exim was keeping the "process log" file open after each use, just as it
6374 does for the main log. This opens the possibility of it remaining open for
6375 long periods when the USR1 signal hits a daemon. Occasional processlog
6376 errors were reported, that could have been caused by this. Anyway, it seems
6377 much more sensible not to leave this file open at all, so that is what now
6380 29. The long-running daemon process does not normally write to the log once it
6381 has entered its main loop, and it closes the log before doing so. This is
6382 so that log files can straightforwardly be renamed and moved. However,
6383 there are a couple of unusual error situations where the daemon does write
6384 log entries, and I had neglected to close the log afterwards.
6386 30. The text of an SMTP error response that was received during a remote
6387 delivery was being truncated at 512 bytes. This is too short for some of
6388 the long messages that one sometimes sees. I've increased the limit to
6391 31. It is now possible to make retry rules that apply only when a message has a
6392 specific sender, in particular, an empty sender.
6394 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6395 it possible to be selective about when SMTP synchronization is enforced.
6397 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6399 32. Implemented hosts_connection_nolog.
6401 33. Added an ACL for QUIT.
6403 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6406 35. Added mailbox_size and mailbox_filecount to appendfile.
6408 36. Added control = no_multiline_responses to ACLs.
6410 37. There was a bug in the logic of the code that waits for the clock to tick
6411 in the case where the clock went backwards by a substantial amount such
6412 that the microsecond fraction of "now" was more than the microsecond
6413 fraction of "then" (but the whole seconds number was less).
6415 38. Added support for the libradius Radius client library this is found on
6416 FreeBSD (previously only the radiusclient library was supported).
6422 1. When certain lookups returned multiple values in the form name=value, the
6423 quoting of the values was not always being done properly. Specifically:
6424 (a) If the value started with a double quote, but contained no whitespace,
6426 (b) If the value contained whitespace other than a space character (i.e.
6427 tabs or newlines or carriage returns) it was not quoted.
6428 This fix has been applied to the mysql and pgsql lookups by writing a
6429 separate quoting function and calling it from the lookup code. The fix
6430 should probably also be applied to nisplus, ibase and oracle lookups, but
6431 since I cannot test any of those, I have not disturbed their existing code.
6433 2. A hit in the callout cache for a specific address caused a log line with no
6434 reason for rejecting RCPT. Now it says "Previous (cached) callout
6435 verification failure".
6437 3. There was an off-by-one bug in the queryprogram router. An over-long
6438 return line was truncated at 256 instead of 255 characters, thereby
6439 overflowing its buffer with the terminating zero. As well as fixing this, I
6440 have increased the buffer size to 1024 (and made a note to document this).
6442 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6443 when Exim is waiting for an SMTP response from a remote server, Exim
6444 restarts its select() call on the socket, thereby resetting its timeout.
6445 This is not a problem when such interrupts are rare. Somebody set up a cron
6446 job to run exiwhat every 2 minutes, which is less than the normal select()
6447 timeout (5 or 10 minutes). This meant that the select() timeout never
6448 kicked in because it was always reset. I have fixed this by comparing the
6449 time when an interrupt arrives with the time at the start of the first call
6450 to select(). If more time than the timeout has elapsed, the interrupt is
6451 treated as a timeout.
6453 5. Some internal re-factoring in preparation for the addition of Sieve
6454 extensions (by MH). In particular, the "personal" test is moved to a
6455 separate function, and given an option for scanning Cc: and Bcc: (which is
6456 not set for Exim filters).
6458 6. When Exim created an email address using the login of the caller as the
6459 local part (e.g. when creating a From: or Sender: header line), it was not
6460 quoting the local part when it contained special characters such as @.
6462 7. Installed new OpenBSD configuration files.
6464 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6465 try to make them clearer.
6467 9. Callout options, other than the timeout value, were being ignored when
6468 verifying sender addresses in header lines. For example, when using
6470 verify = header_sender/callout=no_cache
6472 the cache was (incorrectly) being used.
6474 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6475 only the Cygwin environment.
6477 11. When return_path_on_delivery was set as a log selector, if different remote
6478 addresses in the same message used different return paths and parallel
6479 remote delivery occurred, the wrong values would sometimes be logged.
6480 (Whenever a remote delivery process finished, the return path value from
6481 the most recently started remote delivery process was logged.)
6483 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6484 lines when AUTH and/or TLS are in use. This is the "received protocol"
6485 field. Exim used to use "asmtp" for authenticated SMTP, without any
6486 indication (in the protocol name) for TLS use. Now it follows the RFC and
6487 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6488 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6489 names appear in log lines as well as in Received: header lines.
6491 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6492 extensions, and comparison tests, and to fix some bugs.
6494 14. Changes to the "personal" filter test:
6496 (1) The test was buggy in that it was just doing the equivalent of
6497 "contains" tests on header lines. For example, if a user's address was
6498 anne@some.where, the "personal" test would incorrectly be true for
6500 To: susanne@some.where
6502 This test is now done by extracting each address from the header in turn,
6503 and checking the entire address. Other tests that are part of "personal"
6504 are now done using regular expressions (for example, to check local parts
6505 of addresses in From: header lines).
6507 (2) The list of non-personal local parts in From: addresses has been
6508 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6509 taken from the Sieve specification recommendations.
6511 (3) If the message contains any header line starting with "List-" it is
6512 treated as non-personal.
6514 (4) The test for "circular" in the Subject: header line has been removed
6515 because it now seems ill-conceived.
6517 15. Minor typos in src/EDITME comments corrected.
6519 16. Installed latest exipick from John Jetmore.
6521 17. If headers_add on a router specified a text string that was too long for
6522 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6523 of string_sprintf() is now avoided.
6525 18. $message_body_size was not set (it was always zero) when running the DATA
6526 ACL and the local_scan() function.
6528 19. For the "mail" command in an Exim filter, no default was being set for
6529 the once_repeat time, causing a random time value to be used if "once" was
6530 specified. (If the value happened to be <= 0, no repeat happened.) The
6531 default is now 0s, meaning "never repeat". The "vacation" command was OK
6532 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6533 (I found it when inspecting the code).
6535 20. There is now an overall timeout for performing a callout verification. It
6536 defaults to 4 times the callout timeout, which applies to individual SMTP
6537 commands during the callout. The overall timeout applies when there is more
6538 than one host that can be tried. The timeout is checked before trying the
6539 next host. This prevents very long delays if there are a large number of
6540 hosts and all are timing out (e.g. when the network connections are timing
6541 out). The value of the overall timeout can be changed by specifying an
6542 additional sub-option for "callout", called "maxwait". For example:
6544 verify = sender/callout=5s,maxwait=20s
6546 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6547 to the end before writing, but this should make it even safer).
6549 22. Exim was forgetting that it had advertised PIPELINING for the second and
6550 subsequent messages on an SMTP connection. It was also not resetting its
6551 memory on STARTTLS and an internal HELO.
6553 23. When Exim logs an SMTP synchronization error within a session, it now
6554 records whether PIPELINING has been advertised or not.
6556 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6557 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6558 rather than long int.
6560 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6562 26. Added the never_mail option to autoreply.
6568 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6569 crash if the getsockname() call failed; this can happen if a connection is
6570 closed very soon after it is established. The problem was simply in the
6571 order in which certain operations were done, causing Exim to try to write
6572 to the SMTP stream before it had set up the file descriptor. The bug has
6573 been fixed by making things happen in the correct order.
6579 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6580 before the connection was closed, thus losing the rejection response.
6582 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6583 some early Solaris releases, but causes trouble in current releases where
6584 socklen_t is defined.
6586 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6589 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6592 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6593 that releasing the top of it at the end releases what was used for sub-
6594 expansions (unless the block got too big). However, discard this block if
6595 the first thing is a variable or header, so that we can use its block when
6596 it is dynamic (useful for very large $message_headers, for example).
6598 6. Lookups now cache *every* query, not just the most recent. A new, separate
6599 store pool is used for this. It can be recovered when all lookup caches are
6600 flushed. Lookups now release memory at the end of their result strings.
6601 This has involved some general refactoring of the lookup sources.
6603 7. Some code has been added to the store_xxx() functions to reduce the amount
6604 of flapping under certain conditions.
6606 8. log_incoming_interface used to affect only the <= reception log lines. Now
6607 it causes the local interface and port to be added to several more SMTP log
6608 lines, for example "SMTP connection from", and rejection lines.
6610 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6612 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6614 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6615 could be overwritten at the end of the current message (or the start of a
6616 new message if it was set in a HELO ACL). The value is now preserved for
6617 the duration of the SMTP connection.
6619 12. If a transport had a headers_rewrite setting, and a matching header line
6620 contained an unqualified address, that address was qualified, even if it
6621 did not match any rewriting rules. The underlying bug was that the values
6622 of the flags that permit the existence of unqualified sender and recipient
6623 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6624 non-local messages, and by -bnq for local messages) were not being
6625 preserved with the message after it was received.
6627 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6628 "next input=" as part of the text comprising the host identity instead of
6629 the correct text. The code was using the same buffer for two different
6630 strings. However, depending on which order the printing function evaluated
6631 its arguments, the bug did not always show up. Under Linux, for example, my
6632 test suite worked just fine.
6634 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6635 doesn't work with some older versions of Perl. It has been changed to "my",
6636 which in any case is probably the better facility to use.
6638 15. A really picky compiler found some instances of statements for creating
6639 error messages that either had too many or two few arguments for the format
6642 16. The size of the buffer for calls to the DNS resolver has been increased
6643 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6644 for addresses that have a lot of PTR records. This alleviates a problem; it
6645 does not fully solve it.
6647 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6648 buffer now truncates the list and logs the incident, which is the same
6649 action as happens when Exim is looking up a host name and its aliases.
6650 Previously in this situation something unpredictable would happen;
6651 sometimes it was "internal error: store_reset failed".
6653 18. If a server dropped the connection unexpectedly when an Exim client was
6654 using GnuTLS and trying to read a response, the client delivery process
6655 crashed while trying to generate an error log message.
6657 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6658 string, for example:
6660 warn message = H1: something\nH2: something
6662 the text was added as a single header line from Exim's point of view
6663 though it ended up OK in the delivered message. However, searching for the
6664 second and subsequent header lines using $h_h2: did not work. This has been
6665 fixed. Similarly, if a system filter added multiple headers in this way,
6666 the routers could not see them.
6668 20. Expanded the error message when iplsearch is called with an invalid key to
6669 suggest using net-iplsearch in a host list.
6671 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6672 ACLs are no longer actually imposed (and a message to that effect is
6675 22. If a "gecos" field in a passwd entry contained escaped characters, in
6676 particular, if it contained a \" sequence, Exim got it wrong when building
6677 a From: or a Sender: header from that name. A second bug also caused
6678 incorrect handling when an unquoted " was present following a character
6679 that needed quoting.
6681 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6682 was not being matched caselessly.
6684 24. Arranged for all hyphens in the exim.8 source to be escaped with
6687 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6688 properly. Recipient callout cache records were still being keyed to include
6689 the sender, even when use_sender was set false. This led to far more
6690 callouts that were necessary. The sender is no longer included in the key
6691 when use_sender is false.
6693 26. Added "control = submission" modifier to ACLs.
6695 27. Added the ${base62d: operator to decode base 62 numbers.
6697 28. dnsdb lookups can now access SRV records.
6699 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6700 the configuration file.
6702 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6703 (-v) mode. This makes the output for a verbose queue run more intelligible.
6705 31. Added a use_postmaster feature to recipient callouts.
6707 32. Added the $body_zerocount variable, containing the number of binary zero
6708 bytes in the message body.
6710 33. The time of last modification of the "new" subdirectory is now used as the
6711 "mailbox time last read" when there is a quota error for a maildir
6714 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6716 35. Added +ignore_unknown as a special item in host lists.
6718 36. Code for decoding IPv6 addresses in host lists is now included, even if
6719 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6720 address was recognized as an IP address, but was then not correctly decoded
6721 into binary, causing unexpected and incorrect effects when compared with
6728 1. Very minor rewording of debugging text in manualroute to say "list of
6729 hosts" instead of "hostlist".
6731 2. If verify=header_syntax was set, and a header line with an unqualified
6732 address (no domain) and a large number of spaces between the end of the
6733 name and the colon was received, the reception process suffered a buffer
6734 overflow, and (when I tested it) crashed. This was caused by some obsolete
6735 code that should have been removed. The fix is to remove it!
6737 3. When running in the test harness, delay a bit after writing a bounce
6738 message to get a bit more predictability in the log output.
6740 4. Added a call to search_tidyup() just before forking a reception process. In
6741 theory, someone could use a lookup in the expansion of smtp_accept_max_
6742 per_host which, without the tidyup, could leave open a database connection.
6744 5. Added the variables $recipient_data and $sender_data which get set from a
6745 lookup success in an ACL "recipients" or "senders" condition, or a router
6746 "senders" option, similar to $domain_data and $local_part_data.
6748 6. Moved the writing of debug_print from before to after the "senders" test
6751 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6752 problems for message scanning, either using a data ACL, or using
6753 local_scan() because the Received: header was not generated till after they
6754 were called (in order to set the time as the time of reception completion).
6755 I have revised the way this works. The header is now generated after the
6756 body is received, but before the ACL or local_scan() are called. After they
6757 are run, the timestamp in the header is updated.
6763 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6764 before starting a queue runner without re-exec. This happened only when
6765 deliver_drop_privilege was set or when the Exim user was set to root. The
6766 effect of the bug was that timeouts during subsequent deliveries caused
6767 crashes instead of being properly handled. The handler is now left at its
6768 default (and expected) setting.
6770 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6771 message, again when deliver_drop_privilege is set or Exim is run as root.
6772 The bug described in (1) was not present in this case, but the tidying up
6773 of the other signals was missing. I have made the two cases consistent.
6775 3. The ignore_target_hosts setting on a manualroute router was being ignored
6776 for hosts that were looked up using the /MX notation.
6778 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6781 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6782 operated on the sender address. After changing the $sender_address to <>
6783 for the sender address verify, Exim was re-instated it as the original
6784 (before rewriting) address, but remembering that it had rewritten it, so it
6785 wasn't rewriting it again. This bug also had the effect of breaking the
6786 sender address verification caching when the sender address was rewritten.
6788 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6789 This has been changed so that if the ip literal address matches
6790 ignore_target_hosts, the router declines.
6792 7. Added expansion conditions match_domain, match_address, and match_local_
6793 part (NOT match_host).
6795 8. The placeholder for the Received: header didn't have a length field set.
6797 9. Added code to Exim itself and to exim_lock to test for a specific race
6798 condition that could lead to file corruption when using MBX delivery. The
6799 issue is with the lockfile that is created in /tmp. If this file is removed
6800 after a process has opened it but before that process has acquired a lock,
6801 there is the potential for a second process to recreate the file and also
6802 acquire a lock. This could lead to two Exim processes writing to the file
6803 at the same time. The added code performs the same test as UW imapd; it
6804 checks after acquiring the lock that its file descriptor still refers to
6805 the same named file.
6807 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6808 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6811 11. Added the smtp_active_hostname option. If used, this will typically be made
6812 to depend on the incoming interface address. Because $interface_address is
6813 not set up until the daemon has forked a reception process, error responses
6814 that can happen earlier (such as "too many connections") no longer contain
6817 12. If an expansion in a condition on a "warn" statement fails because a lookup
6818 defers, the "warn" statement is abandoned, and the next ACL statement is
6819 processed. Previously this caused the whole ACL to be aborted.
6821 13. Added the iplsearch lookup type.
6823 14. Added ident_timeout as a log selector.
6825 15. Added tls_certificate_verified as a log selector.
6827 16. Added a global option tls_require_ciphers (compare the smtp transport
6828 option of the same name). This controls incoming TLS connections.
6830 17. I finally figured out how to make tls_require_ciphers do a similar thing
6831 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6832 before starting the TLS session.
6834 18. Tabs are now shown as \t in -bP output.
6836 19. If the log selector return_path_on_delivery was set, Exim crashed when
6837 bouncing a message because it had too many Received: header lines.
6839 20. If two routers both had headers_remove settings, and the first one included
6840 a superfluous trailing colon, the final name in the first list and the
6841 first name in the second list were incorrectly joined into one item (with a
6842 colon in the middle).
6848 1. Added -C and -D options to the exinext utility, mainly to make it easier
6849 to include in the automated testing, but these could be helpful when
6850 multiple configurations are in use.
6852 2. The exinext utility was not formatting the output nicely when there was
6853 an alternate port involved in the retry record key, nor when there was a
6854 message id as well (for retries that were specific to a specific message
6855 and a specific host). It was also confused by IPv6 addresses, because of
6856 the additional colons they contain. I have fixed the IPv4 problem, and
6857 patched it up to do a reasonable job for IPv6.
6859 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6860 delivery, the log line now contains "pipelined" if PIPELINING was used.
6862 4. An SMTP transport process used to panic and die if the bind() call to set
6863 an explicit outgoing interface failed. This has been changed; it is now
6864 treated in the same way as a connect() failure.
6866 5. A reference to $sender_host_name in the part of a conditional expansion
6867 that was being skipped was still causing a DNS lookup. This no longer
6870 6. The def: expansion condition was not recognizing references to header lines
6871 that used bh_ and bheader_.
6873 7. Added the _cache feature to named lists.
6875 8. The code for checking quota_filecount in the appendfile transport was
6876 allowing one more file than it should have been.
6878 9. For compatibility with Sendmail, the command line option
6886 and sets the incoming protocol and host name (for trusted callers). The
6887 host name and its colon can be omitted when only the protocol is to be set.
6888 Note the Exim already has two private options, -pd and -ps, that refer to
6889 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6890 "s", but I don't think that's a major issue.
6892 10. A number of refactoring changes to the code, none of which should affect
6895 (a) The number of logging options was getting close to filling up the
6896 32-bit word that was used as a bit map. I have split them into two classes:
6897 those that are passed in the argument to log_write(), and those that are
6898 only ever tested independently outside of that function. These are now in
6899 separate 32-bit words, so there is plenty of room for expansion again.
6900 There is no change in the user interface or the logging behaviour.
6902 (b) When building, for example, log lines, the code previously used a
6903 macro that called string_cat() twice, in order to add two strings. This is
6904 not really sufficiently general. Furthermore, there was one instance where
6905 it was actually wrong because one of the argument was used twice, and in
6906 one call a function was used. (As it happened, calling the function twice
6907 did not affect the overall behaviour.) The macro has been replaced by a
6908 function that can join an arbitrary number of extra strings onto a growing
6911 (c) The code for expansion conditions now uses a table and a binary chop
6912 instead of a serial search (which was left over from when there were very
6913 few conditions). Also, it now recognizes conditions like "pam" even when
6914 the relevant support is not compiled in: a suitably worded error message is
6915 given if an attempt is made to use such a condition.
6917 11. Added ${time_interval:xxxxx}.
6919 12. A bug was causing one of the ddress fields not to be passed back correctly
6920 from remote delivery subprocesses. The field in question was not being
6921 subsequently used, so this caused to problems in practice.
6923 13. Added new log selectors queue_time and deliver_time.
6925 14. Might have fixed a bug in maildirsizefile handling that threw up
6926 "unexpected character" debug warnings, and recalculated the data
6927 unnecessarily. In any case, I expanded the warning message to give more
6930 15. Added the message "Restricted characters in address" to the statements in
6931 the default ACL that block characters like @ and % in local parts.
6933 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6934 Three changes have been made:
6936 (a) There was a serious bug; a negative response to MAIL caused the whole
6937 recipient domain to be cached as invalid, thereby blocking all messages
6938 to all local parts at the same domain, from all senders. This bug has
6939 been fixed. The domain is no longer cached after a negative response to
6940 MAIL if the sender used is not empty.
6942 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6945 (c) A new callout option, "use_sender" has been added for people who want
6946 the modified behaviour.
6952 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6955 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6956 indeed breaks things for older releases.
6958 3. Added additional logging to the case where there is a problem reading data
6959 from a filter that is running in a subprocess using a pipe, in order to
6960 try to track down a specific problem.
6962 4. Testing facility fudge: when running in the test harness and attempting
6963 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6964 getting "No route to host". Convert this to a timeout.
6966 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6969 6. Some OS don't have socklen_t but use size_t instead. This affects the
6970 fifth argument of getsockopt() amongst other things. This is now
6971 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6972 can be set for individual OS. I have set it for SunOS5, OSF1, and
6973 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6974 some earlier ones do not.
6976 7. Change 4.30/15 was not doing the test caselessly.
6978 8. The standard form for an IPv6 address literal was being rejected by address
6979 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6980 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6981 this, as well as the form without the "IPv6" on the front (but only when
6982 address literals are enabled, of course).
6984 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6986 10. Exim crashed if a message with an empty sender address specified by -f
6987 encountered a router with an errors_to setting. This could be provoked only
6988 by a command such as
6992 where an empty string was supplied; "<>" did not hit this bug.
6994 11. Installed PCRE release 4.5.
6996 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6997 remained set. It is now erased.
6999 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7000 times from message ids (which are base 36 rather than the normal 62).
7002 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7003 were being counted as actual protocol errors, and logged if the log
7004 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7005 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7006 and DATA following a set of rejected RCPTs do not count as protocol errors.
7007 In other words, Exim assumes they were pipelined, though this may not
7008 actually be the case. Of course, in all cases the client gets an
7009 appropriate error code.
7011 15. If a lookup fails in an ACL condition, a message about the failure may
7012 be available; it is used if testing the ACL cannot continue, because most
7013 such messages specify what the cause of the deferral is. However, some
7014 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7015 that caused an old message to be retained and used if a later statement
7016 caused a defer, replacing the real cause of the deferral.
7018 16. If an IP address had so many PTR records that the DNS lookup buffer
7019 was not large enough to hold them, Exim could crash while trying to process
7020 the truncated data. It now detects and logs this case.
7022 17. Further to 4.21/58, another change has been made: if (and only if) the
7023 first line of a message (the first header line) ends with CRLF, a bare LF
7024 in a subsequent header line has a space inserted after it, so as not to
7025 terminate the header.
7027 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7028 unnecessarily, used atoi() instead of strtol(), and didn't check the
7029 termination when getting file sizes from file names by regex.
7031 19. Completely re-implemented the support for maildirsize files, in the light
7032 of a number of problems with the previous contributed implementation
7033 (4.30/29). In particular:
7035 . If the quota is zero, the maildirsize file is maintained, but no quota is
7038 . If the maildir directory does not exist, it is created before any attempt
7039 to write a maildirsize file.
7041 . The quota value in the file is just a cache; if the quota is changed in
7042 the transport, the new value overrides.
7044 . A regular expression is available for excluding directories from the
7047 20. The autoreply transport checks the characters in options that define the
7048 message's headers; it allows continued headers, but it was checking with
7049 isspace() after an embedded newline instead of explicitly looking for a
7052 21. If all the "regular" hosts to which an address was routed had passed their
7053 expiry times, and had not reached their retry times, the address was
7054 bounced, even if fallback hosts were defined. Now Exim should go on to try
7057 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7058 equivalent code in the SMTP transport. Some hosts send humungous responses
7059 to HELO/EHLO, more than 1024 it seems.
7061 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7062 gives compiler warnings in some environments. I've now done it "properly",
7065 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7066 (because of problems with the built-in one) was declared to return uschar *
7067 instead of char *, causing compiler failure.
7069 25. Fixed a file descriptor leak when processing alias/forward files.
7071 26. Fixed a minor format string issue in dbfn.c.
7073 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7075 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7076 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7079 29. When a sender address is verified, it is cached, to save repeating the test
7080 when there is more than one recipient in a message. However, when the
7081 verification involves a callout, it is possible for different callout
7082 options to be set for different recipients. It is too complicated to keep
7083 track of this in the cache, so now Exim always runs a verification when a
7084 callout is required, relying on the callout cache for the optimization.
7085 The overhead is duplication of the address routing, but this should not be
7088 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7089 to be verified with callout=postmaster, and the main callout worked but the
7090 postmaster check failed, the verification correctly failed. However, if a
7091 subsequent RCPT command asked for sender verification *without* the
7092 postmaster check, incorrect caching caused this verification also to fail,
7095 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7096 it was not caching the DNS options (qualify_single, search_parents) that
7097 were used when the lookup failed. A subsequent lookup with different
7098 options therefore always gave the same answer, though there were cases
7099 where it should not have. (Example: a "domains = !$mx_any" option on a
7100 dnslookup router: the "domains" option is always processed without any
7101 widening, but the router might have qualify_single set.) Now Exim uses the
7102 cached value only when the same options are set.
7104 32. Added John Jetmore's "exipick" utility to the distribution.
7106 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7107 than a timeout (e.g. a certificate is required, and is not provided), an
7108 Exim server now closes the connection immediately. Previously it waited for
7109 the client to close - but if the client is SSL, it seems that they each
7110 wait for each other, leading to a delay before one of them times out.
7112 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7113 maintained 0.8.x compatibility because I don't think many are using it, and
7114 it is clearly obsolete.
7116 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7119 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7120 client certificate was expired. A simple patch fixes this, though I don't
7121 understand the full logic of why the verify callback is called multiple
7124 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7125 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7126 which causes problems with some clients (such as the Certicom SSL Plus
7127 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7128 disables the coutermeasure allowing Eudora to connect."
7130 38. Exim was not checking that a write() to a log file succeeded. This could
7131 lead to Bad Things if a log got too big, in particular if it hit a file
7132 size limit. Exim now panics and dies if it cannot write to a log file, just
7133 as it does if it cannot open a log file.
7135 39. Modified OS/Makefile-Linux so that it now contains
7137 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7139 The two -D definitions ensure that Exim is compiled with large file
7140 support, which makes it possible to handle log files that are bigger than
7143 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7144 instance) a domain was checked against a named list that involved a lookup,
7145 causing $domain_data to be set, then another domain was checked against the
7146 same list, then the first domain was re-checked, the value of $domain_data
7147 after the final check could be wrong. In particular, if the second check
7148 failed, it could be set empty. This bug probably also applied to
7151 41. The strip_trailing_dot option was not being applied to the address given
7152 with the -f command-line option.
7154 42. The code for reading a message's header from the spool was incrementing
7155 $received_count, but never initializing it. This meant that the value was
7156 incorrect (doubled) while delivering a message in the same process in which
7157 it was received. In the most common configuration of Exim, this never
7158 happens - a fresh exec is done - but it can happen when
7159 deliver_drop_privilege is set.
7161 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7162 it now includes up to 150 characters of the unexpected data in the log
7165 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7166 and building data strings. The size of both of these buffers was 10 000
7167 bytes - far larger than anybody would *ever* want, thought I. Needless to
7168 say, somebody hit the limit. I have increased the maximum line length to
7169 20 000 and the maximum data length of concatenated lines to 100 000. I have
7170 also fixed two bugs, because there was no checking on these buffers. Tsk,
7171 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7172 buffer is too small.
7174 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7175 lsearch lookups. Now it does.
7177 46. When parsing a route_list item in a manualroute router, a fixed-length
7178 buffer was used for the list of hosts. I made this 1024 bytes long,
7179 thinking that nobody would ever have a list of hosts that long. Wrong.
7180 Somebody had a whole pile of complicated expansion conditions, and the
7181 string was silently truncated, leading to an expansion error. It turns out
7182 that it is easier to change to an unlimited length (owing to other changes
7183 that have happened since this code was originally written) than to build
7184 structure for giving a limitation error. The length of the item that
7185 expands into the list of hosts is now unlimited.
7187 47. The lsearch lookup could not handle data where the length of text line was
7188 more than 4095 characters. Such lines were truncated, leading to shortened
7189 data being returned. It should now handle lines of any length.
7191 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7192 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7195 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7196 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7197 no longer happens in comment lines. A list of replacements is now placed
7198 at the head of all of the source files, except those whose only change is
7199 to replace PERL_COMMAND in the very first #! line.
7201 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7202 messages on the queue, with a bottom-up merge sort, using code contributed
7203 by Michael Haardt. This should make operations like -bp somewhat faster on
7204 large queues. It won't affect queue runners, except when queue_run_in_order
7207 51. Installed eximstats 1.31 in the distribution.
7209 52. Added support for SRV lookups to the dnslookup router.
7211 53. If an ACL referred to $message_body or $message_body_end, the value was not
7212 reset for any messages that followed in the same SMTP session.
7214 54. The store-handling optimization for building very long strings was not
7215 differentiating between the different store pools. I don't think this
7216 actually made any difference in practice, but I've tidied it.
7218 55. While running the routers to verify a sender address, $sender_address
7219 was still set to the sender address. This is wrong, because when routing to
7220 send a bounce to the sender, it would be empty. Therefore, I have changed
7221 it so that, while verifying a sender address, $sender_address is set to <>.
7222 (There is no change to what happens when verifying a recipient address.)
7224 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7225 target A or AAAA records (if not already returned) without resetting the
7226 qualify_single or search_parents options of the DNS resolver. These are
7227 inappropriate in this case because the targets of MX and SRV records must
7228 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7229 target that, when qualified, matched something in the local domain. These
7230 two options are now turned off when doing these lookups.
7232 57. It seems that at least some releases of Reiserfs (which does not have the
7233 concept of a fixed number of inodes) returns zero and not -1 for the
7234 number of available inodes. This interacted badly with check_spool_inodes,
7235 which assumed that -1 was the "no such thing" setting. What I have done is
7236 to check that the total number of inodes is greater than zero before doing
7237 the test of how many are available.
7239 58. When a "warn" ACL statement has a log_message modifier, the message is
7240 remembered, and not repeated. This is to avoid a lot of repetition when a
7241 message has many recipients that cause the same warning to be written.
7242 However, Exim was preserving the list of already written lines for an
7243 entire SMTP session, which doesn't seem right. The memory is now reset if a
7244 new message is started.
7246 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7247 debugging output unless log_rewrite was also set.
7249 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7250 of (int)(handle) when we know that handle contains (void *)(-1).
7252 61. The Exim daemon panic-logs an error return when it closes the incoming
7253 connection. However "connection reset by peer" seems to be common, and
7254 isn't really an error worthy of noting specially, so that particular error
7257 62. When Exim is trying to find all the local interfaces, it used to panic and
7258 die if the ioctl to get the interface flags failed. However, it seems that
7259 on at least one OS (Solaris 9) it is possible to have an interface that is
7260 included in the list of interfaces, but for which you get a failure error
7261 for this call. This happens when the interface is not "plumbed" into a
7262 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7263 failure of the "get flags" call assumes that the interface is down.
7265 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7266 makes life easier for people who are doing arithmetic on fields extracted
7267 from dates, where you often get leading zeros that should not be
7268 interpreted as octal.
7270 64. Added qualify_domain to the redirect router, to override the global
7273 65. If a pathologically long header line contained very many addresses (the
7274 report of this problem mentioned 10 000) and each of them was rewritten,
7275 Exim could use up a very large amount of memory. (It kept on making new
7276 copies of the header line as it rewrote, and never released the old ones.)
7277 At the expense of a bit more processing, the header rewriting function has
7278 been changed so that it no longer eats memory in this way.
7280 66. The generation of the Received: header has been moved from the time that a
7281 message starts to be received, to the time that it finishes. The timestamp
7282 in the Received: header should now be very close to that of the <= log
7283 line. There are two side-effects of this change:
7285 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7286 logged header lines no longer include the local Received: line, because
7287 it has not yet been created. The same applies to a copy of the message
7288 that is returned to a non-SMTP sender when a message is rejected.
7290 (b) When a filter file is tested using -bf, no additional Received: header
7291 is added to the test message. After some thought, I decided that this
7294 This change does not affect the value of $received_for. It is still set
7295 after address rewriting, but before local_scan() is called.
7297 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7299 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7300 gave an unhelpful panic error message, and a defer error. I have managed to
7301 change this behaviour so that it now rejects any supplied certificate,
7302 which seems right, as the list of acceptable certificates is empty.
7304 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7305 gave an unhelpful defer error. I have not managed to make this reject any
7306 supplied certificates, but the error message it gives is "no certificate
7307 supplied", which is not helpful.
7309 70. exigrep's output now also includes lines that are not associated with any
7310 message, but which match the given pattern. Implemented by a patch from
7311 Martin Sluka, which also tidied up the Perl a bit.
7313 71. Recipient callout verification, like sender verification, was using <> in
7314 the MAIL FROM command. This isn't really the right thing, since the actual
7315 sender may affect whether the remote host accepts the recipient or not. I
7316 have changed it to use the actual sender in the callout; this means that
7317 the cache record is now keyed on a recipient/sender pair, not just the
7318 recipient address. There doesn't seem to be a real danger of callout loops,
7319 since a callout by the remote host to check the sender would use <>.
7320 [SEE ABOVE: changed after hitting problems.]
7322 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7323 temporary errors. However, in the case of such a code being given after
7324 the end of a data transmission (i.e. after ".") Exim was failing to write
7325 a retry record for the message. (Yes, there was some broken host that was
7326 actually sending 8xx at this point.)
7328 73. An unknown lookup type in a host list could cause Exim to panic-die when
7329 the list was checked. (An example that provoked this was putting <; in the
7330 middle of a list instead of at the start.) If this happened during a DATA
7331 ACL check, a -D file could be left lying around. This kind of configuration
7332 error no longer causes Exim to die; instead it causes a defer error. The
7333 incident is still logged to the main and panic logs.
7335 74. Buglet left over from Exim 3 conversion. The message "too many messages
7336 in one connection" was written to the rejectlog but not the mainlog, except
7337 when address rewriting (yes!) was being logged.
7339 75. Added write_rejectlog option.
7341 76. When a system filter was run not as root (that is, when system_filter_user
7342 was set), the values of the $n variables were not being returned to the
7343 main process; thus, they were not subsequently available in the $sn
7346 77. Added +return_path_on_delivery log selector.
7348 78. A connection timeout was being treated differently from recipients deferred
7349 when testing hosts_max_try with a message that was older than the host's
7350 retry timeout. (The host should not be counted, thus allowing all hosts to
7351 be tried at least once before bouncing.) This may have been the cause of an
7352 occasionally reported bug whereby a message would remain on the queue
7353 longer than the retry timeout, but would be bounced if a delivery was
7354 forced. I say "may" because I never totally pinned down the problem;
7355 setting up timeout/retry tests is difficult. See also the next item.
7357 79. The ultimate address timeout was not being applied to errors that involved
7358 a combination of host plus message (for example, a timeout on a MAIL
7359 command). When an address resolved to a number of possible hosts, and they
7360 were not all tried for each delivery (e.g. because of hosts_max_try), a
7361 message could remain on the queue longer than the retry timeout.
7363 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7366 81. Fixed an obscure SMTP outgoing bug which required at least the following
7367 conditions: (a) there was another message waiting for the same server;
7368 (b) the server returned 5xx to all RCPT commands in the first message so
7369 that the message was not completed; (c) the server dropped the connection
7370 or gave a negative response to the RSET that Exim sends to abort the
7371 transaction. The observed case was a dropped connection after DATA that had
7372 been sent in pipelining mode. That is, the server had advertised PIPELINING
7373 but was not implementing it correctly. The effect of the bug was incorrect
7374 behaviour, such as trying another host, and this could lead to a crash.
7380 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7381 and daemon.c were passed as pointers to ints; they should have been
7382 pointers to socklen_t variables (which are typically unsigned ints).
7384 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7387 3. Fixed a really odd bug that affected only the testing scheme; patching a
7388 certain fixed string in the binary changed the value of another string that
7389 happened to be identical to the end of the original first string.
7391 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7392 name", it returns that address as the IP address. On some operating
7393 systems (e.g. Solaris), it also passes back the IP address string as the
7394 "host name". However, on others (e.g. Linux), it passes back an empty
7395 string. Exim wasn't checking for this, and was changing the host name to an
7396 empty string, assuming it had been canonicalized.
7398 5. Although rare, it is permitted to have more than one PTR record for a given
7399 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7400 all the names associated with an address, because they do in Solaris.
7401 However, it seems that they do not in Linux for data that comes from the
7402 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7403 I found this out when I moved to a new Linux workstation and tried to run
7404 the Exim test suite.
7406 To get round this problem I have changed the code so that it now does its
7407 own call to the DNS to look up PTR records when searching for a host name.
7408 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7409 addresses that are only in /etc/hosts are still found.
7411 This behaviour is, however, controlled by an option called host_lookup_
7412 order, which defaults to "bydns:byaddr". If people want to use the other
7413 order, or indeed, just use one or the other means of lookup, they can
7414 specify it in this variable.
7416 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7417 some operating systems, this comes back from gethostbyaddr() as an empty
7418 string, and this is what Exim used to test for. However, it seems that in
7419 other systems, "." is yielded. Exim now tests for this case too.
7421 7. The values of check_spool_space and check_log_space are now held internally
7422 as a number of kilobytes instead of an absolute number of bytes. If a
7423 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7424 kilobyte. This means that much larger values can be stored.
7426 8. Exim monitor: an attempt to get the action menu when not actually pointing
7427 at a message produces an empty menu entitled "No message selected". This
7428 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7429 no entries in it ("Shell widget menu has zero width and/or height"). So I
7430 have added a single, blank menu entry in this case.
7432 9. Added ${quote_local_part.
7434 10. MIME decoding is now applied to the contents of Subject: header lines when
7437 11. Now that a reference to $sender_host_address automatically causes a reverse
7438 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7439 host lookup before query-style lookups in lists that might use this
7440 variable. This has therefore been abolished, and the "net-" prefix is no
7441 longer necessary for query-style lookups.
7443 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7444 have been a typo for LFLAGS, so it has been changed.
7446 13. The install script calls Exim with "-C /dev/null" in order to find the
7447 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7448 to be output. However, since Exim outputs its version number before the
7449 error, it didn't break the script. It just looked ugly. I fixed this by
7450 always allowing "-C /dev/null" if the caller is root.
7452 14. Ignore overlarge ACL variable number when reading spool file - insurance
7453 against a later release with more variables having written the file.
7455 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7456 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7457 this, as well as the form without the "IPv6" on the front.
7459 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7460 OS/Makefile-Darwin file.
7462 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7463 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7465 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7466 variable. However, some OS use ints for inodes. I've added cast to long int
7467 to get rid of the compiler warning.
7469 19. I had forgotten to lock out "/../" in configuration file names when
7470 ALT_CONFIG_PREFIX was set.
7472 20. Routers used for verification do not need to specify transports. However,
7473 if such a router generated a host list, and callout was configured, Exim
7474 crashed, because it could not find a port number from the (non-existent)
7475 transport. It now assumes port 25 in this circumstance.
7477 21. Added the -t option to exigrep.
7479 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7480 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7481 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7482 them is set, LOOKUP_LSEARCH is forced.
7484 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7486 24. Added sender and host information to the "rejected by local_scan()" log
7487 line; previously there was no indication of these.
7489 25. Added .include_if_exists.
7491 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7492 Linux. It turns out that not all file systems support this. Apparently some
7493 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7494 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7495 not supported on the file descriptor, is now ignored when Exim is trying to
7496 sync a directory. This applies only to Linux.
7498 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7500 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7501 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7504 29. Added support for maildirsize files from supplied patch (modified a bit).
7506 30. The use of :fail: followed by an empty string could lead Exim to respond to
7507 sender verification failures with (e.g.):
7509 550 Verification failed for <xxx>
7510 550 Sender verify failed
7512 where the first response line was missing the '-' that indicates it is not
7513 the final line of the response.
7515 31. The loop for finding the name of the user that called Exim had a hardwired
7516 limit of 10; it now uses the value of finduser_retries, which is used for
7517 all other user lookups.
7519 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7522 33. Exim was neglecting to zero errno before one call of strtol() when
7523 expanding a string and expecting an integer value. On some systems this
7524 resulted in spurious "integer overflow" errors. Also, it was casting the
7525 result into an int without checking.
7527 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7528 did not work. The code looks as if it has *never* worked, though it appears
7529 to have been documented since at least release 1.62. I have made it work.
7531 35. The "timeout_DNS" error in retry rules, also documented since at least
7532 1.62, also never worked. As it isn't clear exactly what this means, and
7533 clearly it isn't a major issue, I have abolished the feature by treating it
7534 as "timeout", and writing a warning to the main and panic logs.
7536 36. The display of retry rules for -brt wasn't always showing the error code
7539 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7540 timeout_connect_A, timeout_connect_MX.
7542 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7543 to the empty sender.
7545 39. The daemon was not analysing the content of -oX till after it had closed
7546 stderr and disconnected from the controlling terminal. This meant that any
7547 syntax errors were only noted on the panic log, and the return code from
7548 the command was 0. By re-arranging the code a little, I've made the
7549 decoding happen first, so such errors now appear on stderr, and the return
7550 code is 1. However, the actual setting up of the sockets still happens in
7551 the disconnected process, so errors there are still only recorded on the
7554 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7555 connections (as happens on some IP stacks) was logged at start up time as
7556 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7557 it from "IPv6 and IPv4", which means that two separate sockets are being
7560 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7561 says whether AF_INET or AF_INET6 was passed as an argument.
7563 42. Exiwhat output was messed up when time zones were included in log
7566 43. Exiwhat now gives more information about the daemon's listening ports,
7567 and whether -tls-on-connect was used.
7569 44. The "port" option of the smtp transport is now expanded.
7571 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7572 silently ignored. Now an error message is written to the main and panic
7575 46. There's a new ACL modifier called "logwrite" which writes to a log file
7576 as soon as it is encountered.
7578 47. Added $local_user_uid and $local_user_gid at routing time.
7580 48. Exim crashed when trying to verify a sender address that was being
7583 49. Exim was recognizing only a space character after ".include". It now also
7584 recognizes a tab character.
7586 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7587 extracting the relevant information from the specification. The man page no
7588 longer contains scrambled data for the -d option, and I've added a section
7589 at the front about calling Exim under different names.
7591 51. Added "extra_headers" argument to the "mail" command in filter files.
7593 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7596 53. Installed eximstats 1.29.
7598 54. Added transport_filter_timeout as a generic transport option.
7600 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7601 Cc: header lines. This was required by RFC 822, but it not required by RFC
7604 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7605 incoming messages that did not have them. Now it does so only if the
7606 message originates locally, that is, if there is no associated remote host
7607 address. When Resent- header lines are present, this applies to the Resent-
7608 lines rather than the non-Resent- lines.
7610 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7611 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7613 58. Messages for configuration errors now include the name of the main
7614 configuration file - useful now that there may be more than one file in a
7615 list (.included file names were always shown).
7617 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7618 for those rare installations that do not start the daemon as root or run it
7619 setuid root. I've cut out the call to initgroups() if the daemon is not
7622 60. The Exim user and group can now be bound into the binary as text strings
7623 that are looked up at the start of Exim's processing.
7625 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7627 62. Added $mailstore_basename variable.
7629 63. Installed patch to sieve.c from Michael Haardt.
7631 64. When Exim failed to open the panic log after failing to open the main log,
7632 the original message it was trying to log was written to stderr and debug
7633 output, but if they were not available (the usual case in production), it
7634 was lost. Now it is written to syslog before the two lines that record the
7635 failures to open the logs.
7637 65. Users' Exim filters run in subprocesses under the user's uid. It is
7638 possible for a "deliver" command or an alias in a "personal" command to
7639 provoke an address rewrite. If logging of address rewriting is configured,
7640 this fails because the process is not running as root or exim. There may be
7641 a better way of dealing with this, but for the moment (because 4.30 needs
7642 to be released), I have disabled address rewrite logging when running a
7643 filter in a non-root, non-exim process.
7649 1. The buildconfig auxiliary program wasn't quoting the value set for
7650 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7651 not defined. This bug was masked in 4.22 by the effect that was fixed in
7654 2. Some messages that were rejected after a message id was allocated were
7655 shown as "incomplete" by exigrep. It no longer does this for messages that
7656 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7658 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7659 have allow_domain_literals set, the ID did not get logged in the <= line.
7660 Domain literals are now always recognized in Message-ID: header lines.
7662 4. The first argument for a ${extract expansion item is the key name or field
7663 number. Leading and trailing spaces in this item were not being ignored,
7664 causing some misleading effects.
7666 5. When deliver_drop_privilege was set, single queue runner processes started
7667 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7668 same command in the process it spins off) were not dropping privilege.
7670 6. When the daemon running as "exim" started a queue runner, it always
7671 re-executed Exim in the spun-off process. This is a waste of effort when
7672 deliver_drop_privilege is set. The new process now just calls the
7673 queue-runner function directly.
7679 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7682 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7683 ignored. Though the use of -oP was forcing the writing of a pid file, it
7684 was always written to the default place.
7686 3. If the message "no IP address found for host xxxx" is generated during
7687 incoming verification, it is now followed by identification of the incoming
7688 connection (so you can more easily find what provoked it).
7690 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7692 5. Added some features to "harden" Exim a bit more against certain attacks:
7694 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7695 be put in Local/Makefile. This is like the never_users runtime option,
7696 but it cannot be overridden. The default setting is "root".
7698 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7699 prefix string with which any file named in a -C command line option
7702 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7703 is retained for -C and -D only if the caller of Exim is root. Without
7704 it, the exim user may also use -C and -D and retain privilege.
7706 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7707 command line option is disabled.
7709 6. Macro names set by the -D option must start with an upper case letter, just
7710 like macro names defined in the configuration file.
7712 7. Added "dereference=" facility to LDAP.
7714 8. Two instances of the typo "uknown" in the source files are fixed.
7716 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7717 the Configure-Makefile script screwed up while processing it.
7719 10. Incorporated PCRE 4.4.
7721 11. The SMTP synchronization check was not operating right at the start of an
7722 SMTP session. For example, it could not catch a HELO sent before the client
7723 waited for the greeting. There is now a check for outstanding input at the
7724 point when the greeting is written. Because of the duplex, asynchronous
7725 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7726 way, but not yet received, when the check is performed.
7728 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7729 on TCP/IP sockets, because this apparently causes some broken clients to
7732 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7733 unchanged) from the Cygwin maintainer.
7735 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7736 was supported instead of testing for mbx. Effectively a typo.
7738 15. The spa authenticator server code was not checking that the input it
7739 received was valid base64.
7741 16. The debug output line for the "set" modifier in ACLs was not showing the
7742 name of the variable that was being set.
7744 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7746 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7747 lookup on its own. Something else was needed to trigger the lookup. For
7748 example, a match in host_lookup or the need for a host name in a host list.
7749 Now, if $sender_host_name is referenced and the host name has not yet been
7750 looked up, a lookup is performed. If the lookup fails, the variable remains
7751 empty, and $host_lookup_failed is set to "1".
7753 19. Added "eqi" as a case-independent comparison operator.
7755 20. The saslauthd authentication condition could segfault if neither service
7756 nor realm was specified.
7758 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7759 error message that was logged was misleading, and incoming SMTP
7760 connections were dropped. The message is now more accurate, and temporary
7761 errors are given to SMTP connections.
7763 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7764 (except RSET) with a 421 error, until QUIT is received. However, it was
7765 failing to send a response to QUIT.
7767 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7768 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7769 ACL is now run after the helo_try_verify_hosts code.
7771 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7772 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7773 case-independent, so other case variants are also recognized). Apparently
7774 some systems use these upper case variants.
7776 25. If more than two messages were waiting for the same host, and a transport
7777 filter was specified for the transport, Exim sent two messages over the
7778 same TCP/IP connection, and then failed with "socket operation on non-
7779 socket" when it tried to send the third.
7781 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7783 27. The extern definition of crypt16() in expand.c was not being excluded when
7784 the OS had its own crypt16() function.
7786 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7787 as a preferred synonym for return_size_limit, both as an option and as an
7790 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7792 30. Changed the default configuration ACL to relax the local part checking rule
7793 for addresses that are not in any local domains. For these addresses,
7794 slashes and pipe symbols are allowed within local parts, but the sequence
7795 /../ is explicitly forbidden.
7797 31. SPA server authentication was not clearing the challenge buffer before
7800 32. log_message in a "warn" ACL statement was writing to the reject log as
7801 well as to the main log, which contradicts the documentation and doesn't
7802 seem right (because no rejection is happening). So I have stopped it.
7804 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7805 However, I am unable to do any testing of this.
7807 34. Fixed an infelicity in the appendfile transport. When checking directories
7808 for a mailbox, to see if any needed to be created, it was accidentally
7809 using path names with one or more superfluous leading slashes; tracing
7810 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7812 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7813 contents are added to the log line that is written for every discarded
7814 recipient. (Previously a log_message setting was ignored.)
7816 36. The ${quote: operator now quotes the string if it is empty.
7818 37. The install script runs exim in order to find its version number. If for
7819 some reason other than non-existence or emptiness, which it checks, it
7820 could not run './exim', it was installing it with an empty version number,
7821 i.e. as "exim-". This error state is now caught, and the installation is
7824 38. An argument was missing from the function that creates an error message
7825 when Exim fails to connect to the socket for saslauthd authentication.
7826 This could cause Exim to crash, or give a corrupted message.
7828 39. Added isip, isip4, and isip6 to ${if conditions.
7830 40. The ACL variables $acl_xx are now saved with the message, and can be
7831 accessed later in routers, transports, and filters.
7833 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7834 strings in the file are not string-expanded.
7836 42. If a MAIL command specified a SIZE value that was too large to fit into an
7837 int variable, the check against message_size_limit failed. Such values are
7838 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7839 day this will have to be increased, but I don't think I want to be around
7840 when emails are that large.
7847 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7848 iconv() is not standard in FreeBSD.
7850 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7851 IPv6 enabled. The observed symptom was a segmentation fault on return from
7852 the function os_common_find_running_interfaces() in src/os.c.
7854 3. In the check_special_case() function in daemon.c I had used "errno" as an
7855 argument name, which causes warnings on some systems. This was basically a
7856 typo, since it was named "eno" in the comments!
7858 4. The code that waits for the clock to tick (at a resolution of some fraction
7859 of a second) so as to ensure message-id uniqueness was always waiting for
7860 at least one whole tick, when it could have waited for less. [This is
7861 almost certainly not relevant at current processor speeds, where it is
7862 unlikely to ever wait at all. But we try to future-proof.]
7864 5. The function that sleeps for a time interval that includes fractions of a
7865 second contained a race. It did not block SIGALRM between setting the
7866 timer, and suspending (a couple of lines later). If the interval was short
7867 and the sigsuspend() was delayed until after it had expired, the suspension
7868 never ended. On busy systems this could lead to processes getting stuck for
7871 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7872 process, before it forks any delivery processes. The open lookup caching
7873 mechanism meant that the open file or database connection was passed into
7874 the delivery process. The problem was that delivery processes always tidy
7875 up cached lookup data. This could cause a problem for the next delivery
7876 process started by the queue runner, because the external queue runner
7877 process does not know about the closure. So the next delivery process
7878 still has data in the lookup cache. In the case of a file lookup, there was
7879 no problem because closing a file descriptor in a subprocess doesn't affect
7880 the parent. However, if the lookup was caching a connection to a database,
7881 the connection was closed, and the second delivery process was likely to
7882 see errors such as "PGSQL: query failed: server closed the connection
7883 unexpectedly". The problem has been fixed by closing all cached lookups
7884 in a queue runner before running a delivery process.
7886 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7887 seem to have the "const" qualifier which it has on other OS. I've
7890 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7891 *of the same type* (client or server) with the same public name that an
7892 error should be diagnosed.
7894 9. When Exim looked up a host name for an IP address, but failed to find the
7895 original IP address when looking up the host name (a safety check), it
7896 output the message "<ip address> does not match any IP for NULL", which was
7897 confusing, to say the least. The bug was that the host name should have
7898 appeared instead of "NULL".
7900 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7901 user that is built into the binary, and the -C or -D options is used, root
7902 privilege is dropped before the configuration file is read. In addition,
7903 logging is switched to stderr instead of the normal log files. If the
7904 configuration then re-defines the Exim user, the unprivileged environment
7905 is probably not what is expected, so Exim logs a panic warning message (but
7908 However, if deliver_drop_privilege is set, the unprivileged state may well
7909 be exactly what is intended, so the warning has been cut out in that case,
7910 and Exim is allowed to try to write to its normal log files.
7916 1. smtp_return_error_details was not giving details for temporary sender
7917 or receiver verification errors.
7919 2. Diagnose a configuration error if two authenticators have the same public
7922 3. Exim used not to create the message log file for a message until the first
7923 delivery attempt. This could be confusing when incoming messages were held
7924 for policy or load reasons. The message log file is now created at the time
7925 the message is received, and an initial "Received" line is written to it.
7927 4. The automatically generated man page for command line options had a minor
7928 bug that caused no ill effects; however, a more serious problem was that
7929 the procedure for building the man page automatically didn't always
7930 operate. Consequently, release 4.20 contains an out-of-date version. This
7931 shouldn't happen again.
7933 5. When building Exim with embedded Perl support, the script that builds the
7934 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7935 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7937 6. The freeze_tell option was not being used for messages that were frozen on
7938 arrival, either by an ACL or by local_scan().
7940 7. Added the smtp_incomplete_transaction log selector.
7942 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7943 was accepting AUTH without a new EHLO.
7945 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7946 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7949 10. Logging of TCP/IP connections (when configured) now happens in the main
7950 daemon process instead of the child process, so that the TCP/IP connection
7951 count is more accurate (but it can never be perfect).
7953 11. The use of "drop" in a nested ACL was not being handled correctly in the
7954 outer ACL. Now, if condition failure induced by the nested "drop" causes
7955 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7956 or "require"), the connection is dropped.
7958 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7959 that yield "discard" can now be used with an "accept" or a "discard" verb,
7960 but an error is generated for any others (because I can't see a useful way
7961 to define what should happen).
7963 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7964 are now processed in the same way as lines in the Exim configuration file.
7965 In particular, continuation lines are supported.
7967 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7969 15. Added -ti meaning -t -i.
7971 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7972 domains, and warn by logging if others are found.
7974 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7975 returned from GIFCONF when Exim is trying to find the list of interfaces on
7976 a host. The code in os.c has been modified to copy each ifreq to an aligned
7977 structure in all cases.
7979 Also, in some cases, the returned ifreq's were being copied to a 'struct
7980 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7981 means the last couple of bytes of an IPv6 address could be chopped if the
7982 ifreq contained only a normal sockaddr (14 bytes storage).
7984 18. Named domain lists were not supported in the hosts_treat_as_local option.
7985 An entry such as +xxxx was not recognized, and was treated as a literal
7988 19. Ensure that header lines added by a DATA ACL are included in the reject log
7989 if the ACL subsequently rejects the message.
7991 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7992 MD5 (which is deprecated).
7994 21. When testing a filter file using -bf, Exim was writing a message when it
7995 took the sender from a "From " line in the message, but it was not doing so
7996 when it took $return_path from a Return-Path: header line. It now does.
7998 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7999 with a valid header line field name (a series of printing characters
8000 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8002 23. Changed "disc" in the source to "disk" to conform to the documentation and
8003 the book and for uniformity.
8005 24. Ignore Sendmail's -Ooption=value command line item.
8007 25. When execve() failed while trying to run a command in a pipe transport,
8008 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8009 could be confused with a return value of 69 from the command itself. This
8010 has been changed to 127, the value the shell returns if it is asked to run
8011 a non-existent command. The wording for the related log line suggests a
8012 non-existent command as the problem.
8014 26. If received_header_text expands to an empty string, do not add a Received:
8015 header line to the message. (Well, it adds a token one on the spool, but
8016 marks it "old" so that it doesn't get used or transmitted.)
8018 27. Installed eximstats 1.28 (addition of -nt option).
8020 28. There was no check for failure on the call to getsockname() in the daemon
8021 code. This can fail if there is a shortage of resources on the system, with
8022 ENOMEM, for example. A temporary error is now given on failure.
8024 29. Contrary to the C standard, it seems that in some environments, the
8025 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8026 program. Exim now does this explicitly; it affects the formatting of
8027 timestamps using strftime().
8029 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8030 complaints. I've now initialized all the variables, to avoid this.
8032 32. Header lines added by a system filter were not being "seen" during
8033 transport-time rewrites.
8035 33. The info_callback() function passed to OpenSSL is set up with type void
8036 (*)(SSL *, int, int), as described somewhere. However, when calling the
8037 function (actually a macro) that sets it up, the type void(*)() is
8038 expected. I've put in a cast to prevent warnings from picky compilers.
8040 34. If a DNS black list lookup found a CNAME record, but there were no A
8041 records associated with the domain it pointed at, Exim crashed.
8043 35. If a DNS black list lookup returned more than one A record, Exim ignored
8044 all but the first. It now scans all returned addresses if a particular IP
8045 value is being sought. In this situation, the contents of the
8046 $dnslist_value variable are a list of all the addresses, separated by a
8049 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8050 to accept a host name and all its aliases if the forward lookup for any of
8051 them yielded the IP address of the incoming connection. Now it accepts only
8052 those names whose forward lookup yields the correct IP address. Any other
8053 names are discarded. This closes a loophole whereby a rogue DNS
8054 administrator could create reverse DNS records to break through a
8055 wildcarded host restriction in an ACL.
8057 37. If a user filter or a system filter that ran in a subprocess used any of
8058 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8059 the wrong values were passed to the pipe command ($thisaddress had the
8060 value of $0, $0 had the value of $1, etc). This bug was introduced by
8061 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8063 38. Improved the line breaking for long SMTP error messages from ACLs.
8064 Previously, if there was no break point between 40 and 75 characters, Exim
8065 left the rest of the message alone. Two changes have been made: (a) I've
8066 reduced the minimum length to 35 characters; (b) if it can't find a break
8067 point between 35 and 75 characters, it looks ahead and uses the first one
8068 that it finds. This may give the occasional overlong line, but at least the
8069 remaining text gets split now.
8071 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8072 file descriptors might be low, and that setting 1000 would always raise it.
8073 It turns out that in some environments, the limit is already over 1000 and
8074 that lowering it causes trouble. So now Exim takes care not to decrease it.
8076 40. When delivering a message, the value of $return_path is set to $sender_
8077 address at the start of routing (routers may change the value). By an
8078 oversight, this default was not being set up when an address was tested by
8079 -bt or -bv, which affected the outcome if any router or filter referred to
8082 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8083 log only when "message" or "log_message" are set. However, if one of the
8084 conditions was an address verification, or a call to a nested ACL, the
8085 messages generated by the underlying test were being passed through. This
8086 no longer happens. The underlying message is available in $acl_verify_
8087 message for both "message" and "log_message" expansions, so it can be
8088 passed through if needed.
8090 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8091 new expansion $bh_ to give the encoded byte string without charset
8092 translation. Translation happens only if iconv() is available; HAVE_ICONV
8093 indicates this at build time. HEADERS_CHARSET gives the charset to
8094 translate to; headers_charset can change it in the configuration, and
8095 "headers charset" can change it in an individual filter file.
8097 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8098 that creates RFC 2047 encoded "words" labels them as that charset instead
8099 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8100 expansion operator; (ii) when Exim creates a From: line for a local
8101 message; (iii) when a header line is rewritten to include a "phrase" part.
8103 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8104 buggy, causing it to skip the first lines of messages whose message ID
8105 ended in 'D'. This would not have bitten before Exim release 4.14, because
8106 message IDs were unlikely to end in 'D' before then. The effect was to have
8107 incorrect size information for certain domains.
8109 45. #include "config.h" was missing at the start of the crypt16.c module. This
8110 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8113 46. If there was a timeout during a "random" callout check, Exim treated it as
8114 a failure of the random address, and carried on sending RSET and the real
8115 address. If the delay was just some slowness somewhere, the response to the
8116 original RCPT would be taken as a response to RSET and so on, causing
8117 mayhem of various kinds.
8119 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8120 when I implemented it. It didn't allow for the fact that some option values
8121 may legitimately be negative (e.g. size_addition), and it didn't even do
8122 the right test for positive values.
8124 48. Domain names in DNS records are case-independent. Exim always looks them up
8125 in lower case. Some resolvers return domain names in exactly the case they
8126 appear in the zone file, that is, they may contain uppercase letters. Not
8127 all resolvers do this - some return always lower case. Exim was treating a
8128 change of case by a resolver as a change of domain, similar to a widening
8129 of a domain abbreviation. This triggered its re-routing code and so it was
8130 trying to route what was effectively the same domain again. This normally
8131 caused routing to fail (because the router wouldn't handle the domain
8132 twice). Now Exim checks for this case specially, and just changes the
8133 casing of the domain that it ultimately uses when it transmits the message
8136 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8139 50. If a filter generated a file delivery with a non-absolute name (possible if
8140 no home directory exists for the router), the forbid_file option was not
8143 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8144 the existing equality matching.
8146 52. Exim was using ints instead of ino_t variables in some places where it was
8147 dealing with inode numbers.
8149 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8150 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8151 called TMPDIR, and if it finds it is different, it changes its value.
8153 54. The smtp_printf() function is now made available to local_scan() so
8154 additional output lines can be written before returning. There is also an
8155 smtp_fflush() function to enable the detection of a dropped connection.
8156 The variables smtp_input and smtp_batched_input are exported to
8159 55. Changed the default runtime configuration: the message "Unknown user"
8160 has been removed from the ACL, and instead placed on the localuser router,
8161 using the cannot_route_message feature. This means that any verification
8162 failures that generate their own messages won't get overridden. Similarly,
8163 the "Unrouteable address" message that was in the ACL for unverifiable
8164 relay addresses has also been removed.
8166 56. Added hosts_avoid_esmtp to the smtp transport.
8168 57. The exicyclog script was not checking for the esoteric option
8169 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8170 will work only if exicyclog is run under the appropriate euid.
8172 58. Following a discussion on the list, the rules by which Exim recognises line
8173 endings on incoming messages have been changed. The -dropcr and drop_cr
8174 options are now no-ops, retained only for backwards compatibility. The
8175 following line terminators are recognized: LF CRLF CR. However, special
8176 processing applies to CR:
8178 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8179 nor a local message in the state where . is a terminator.
8181 (ii) If a bare CR is encountered in a header line, an extra space is added
8182 after the line terminator so as not to end the header. The reasoning
8183 behind this is that bare CRs in header lines are most likely either
8184 to be mistakes, or people trying to play silly games.
8186 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8187 was being incorrectly given as 18 bytes larger than it should have been.
8188 This is a VOB (very old bug).
8190 60. This may never have affected anything current, but just in case it has:
8191 When the local host is found other than at the start of a list of hosts,
8192 the local host, those with the same MX, and any that follow, are discarded.
8193 When the list in question was part of a longer list of hosts, the following
8194 hosts (not currently being processed) were also being discarded. This no
8195 longer happens. I'm not sure if this situation could ever has previously
8198 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8201 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8202 header. This is something that is recommended in a new Internet Draft, and
8203 is something that is documented as being done by Sendmail. There are two
8204 possible values. For messages generated by the autoreply transport, Exim
8207 Auto-Submitted: auto-replied
8209 whereas for all other generated messages (e.g. bounces) it adds
8211 Auto-Submitted: auto-generated
8213 63. The "personal" condition in filters now includes a test for the
8214 Auto-Submitted: header. If it contains the string "auto-" the message it
8215 not considered personal.
8217 64. Added rcpt_include_affixes as a generic transport option.
8219 65. Added queue_only_override (default true).
8221 66. Added the syslog_duplication option.
8223 67. If what should have been the first header line of a message consisted of
8224 a space followed by a colon, Exim was mis-interpreting it as a header line.
8225 It isn't of course - it is syntactically invalid and should therefore be
8226 treated as the start of the message body. The misbehaviour could have
8227 caused a number of strange effects, including loss of data in subsequent
8228 header lines, and spool format errors.
8230 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8231 client host had authenticated. This control can now be exercised by an ACL
8232 for more flexibility.
8234 69. By default, callouts do not happen when testing with -bh. There is now a
8235 variant, -bhc, which does actually run the callout code, including
8236 consulting and updating the callout cache.
8238 70. Added support for saslauthd authentication, courtesy of Alexander
8241 71. If statvfs() failed on the spool or log directories while checking their
8242 size for availability, Exim confusingly gave the error "space shortage".
8243 Furthermore, in debugging mode it crashed with a floating point exception.
8244 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8245 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8246 serious problem, Exim now writes to the main and panic logs when this
8247 happens, with details of the failure. It then refuses to accept the
8248 incoming message, giving the message "spool directory problem" or "log
8249 directory problem" with a 421 code for SMTP messages.
8251 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8252 0, 1, and 2 exist, because some OS complain for execs without them (see
8253 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8254 descriptors. However, the code omitted to check that the open succeeded,
8255 causing mysterious errors if for some reason the permissions on /dev/null
8256 got screwed. Now Exim writes a message to the main and panic logs, and
8257 bombs out if it can't open /dev/null.
8259 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8260 interact so that it is all more flexible. It is supposed to remain
8261 backwards compatible. Also added extra_local_interfaces.
8263 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8264 to bomb out with an assertion failure - to the client this appears as a
8265 connection drop. This problem occurs in the part of the code that was taken
8266 from the Samba project. Fortunately, the assertion is in a very simple
8267 function, so I have fixed this by reproducing the function inline in the
8268 one place where it is called, and arranging for authentication to fail
8269 instead of killing the process with assert().
8271 75. The SPA client code was not working when the server requested OEM rather
8272 than Unicode encoding.
8274 76. Added code to make require_files with a specific uid setting more usable in
8275 the case where statting the file as root fails - usually a non-root-mounted
8276 NFS file system. When this happens and the failure is EACCES, Exim now
8277 forks a subprocess and does the per-uid checking as the relevant uid.
8279 77. Added process_log_path.
8281 78. If log_file_path was not explicitly set, a setting of check_log_space or
8282 check_log_inodes was ignored.
8284 79. If a space check for the spool or log partitions fails, the incident is now
8285 logged. Of course, in the latter case the data may get lost...
8287 80. Added the %p formatting code to string_format() so that it can be used to
8288 print addresses in debug_print(). Adjusted all the address printing in the
8289 debugging in store.c to use %p rather than %d.
8291 81. There was a concern that a line of code in smtp_in.c could overflow a
8292 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8293 initially expressed, the concern was not well-founded, because trailing
8294 spaces are removed early. However, if the trailing spaces were followed by
8295 a NULL, they did not get removed, so the overflow was possible. Two fixes
8298 (a) I re-wrote the offending code in a cleaner fashion.
8299 (b) If an incoming SMTP command contains a NULL character, it is rejected
8302 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8303 runs initgroups(), so that if the Exim user is in any additional groups,
8304 they will be used during message reception.
8310 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob