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 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
11 HS/01 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
17 This is a security release.
19 JH/01 Bug 2999: Fix a possible OOB write in the external authenticator, which
20 could be triggered by externally-supplied input. Found by Trend Micro.
23 JH/02 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
24 be triggered by externally-controlled input. Found by Trend Micro.
27 JH/03 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
28 be triggered by externally-controlled input. Found by Trend Micro.
31 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
32 Make the rewrite never match and keep the logging. Trust the
33 admin to be using verify=header-syntax (to actually reject the message).
39 JH/01 Move the wait-for-next-tick (needed for unique messmage IDs) from
40 after reception to before a subsequent reception. This should
41 mean slightly faster delivery, and also confirmation of reception
44 JH/02 Move from using the pcre library to pcre2. The former is no longer
45 being developed or supported (by the original developer).
47 JH/03 Constification work in the filters module required a major version
48 bump for the local-scan API. Specifically, the "headers_charset"
49 global which is visible via the API is now const and may therefore
50 not be modified by local-scan code.
52 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
53 sendfile() didi not account for the way the ClamAV driver code called it.
55 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
56 time check was being done for every character; replace that with one
59 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
60 sent was prefixed with a length byte.
62 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
63 RFC 5321. Previously Dovecot (at least) would log errors during
66 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
67 in 4.61 without a reason logged. Binaries will be bigger, which might
68 matter on diskspace-constrained systems, but debug is easier.
70 JH/09 Fix macro-definition during "-be" expansion testing. The move to
71 write-protected store for macros had not accounted for these runtime
72 additions; fix by removing this protection for "-be" mode.
74 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
75 handing out large-numbered file descriptors, violating the usual Unix
76 assumption (and required by Posix) that the lowest possible number will be
77 allocated by the kernel when a new one is needed. In the daemon, and any
78 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
79 are not useable for FD_SET() [and hence select()] and overwrite the stack.
80 Assorted crashes happen.
82 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
83 main-section options or in a connect ACL, the value from the first ever
84 connection was never replaced for subsequent connections. Found by
87 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
88 though only once PCRE2 was introduced: the memory accounting used under
89 debug offset allocations by an int, giving a hard trap in early startup.
90 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
92 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
93 with underbars is given. The write-protection of configuration introduced
94 in 4.95 trapped when normalisation was applied to an option not needing
97 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
99 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
100 failing to close the certificates directory, every hour or any time it
103 JH/16 Debugging initiated by an ACL control now continues through into routing
104 and transport processes. Previously debugging stopped any time Exim
105 re-execs, or for processing a queued message.
107 JH/17 The "expand" debug selector now gives more detail, specifically on the
108 result of expansion operators and items.
110 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
111 bad comparison between the option value and the name of the file to
112 be included was done, and a mismatch was wrongly identified.
113 4.88 to 4.95 are affected.
115 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
117 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
118 supplied as the db file-pair basename. Previously, if a directory
119 path was given, for example via the autoreply "once" option, the DB
120 file.pag and file.dir files would be created in that directory's
123 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
124 "taint" log_selector. These were previously deprecated.
126 JH/22 Fix static address-list lookups to properly return the matched item.
127 Previously only the domain part was returned.
129 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
130 the call into OpenSSL to send a TLS Close was being repeated; this
131 resulted in the library waiting for the peer's Close. If that was never
132 sent we waited forever. Fix by tracking send calls.
134 JH/24 The ${run} expansion item now expands its command string elements after
135 splitting. Previously it was before; the new ordering makes handling
136 zero-length arguments simpler. The old ordering can be obtained by
137 appending a new option "preexpand", after a comma, to the "run".
139 JH/25 Taint-check exec arguments for transport-initiated external processes.
140 Previously, tainted values could be used. This affects "pipe", "lmtp" and
141 "queryprogram" transport, transport-filter, and ETRN commands.
142 The ${run} expansion is also affected: in "preexpand" mode no part of
143 the command line may be tainted, in default mode the executable name
146 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
147 the the facility was not passed across execs, and only the first message
148 passed over a connection could use BDAT; any further ones using DATA.
150 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
151 uses $sending_ip_address and an interface is specified.
152 Previously any use of the local address in the EHLO name disabled
153 PIPECONNECT, the common case being to use the rDNS of it.
155 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
156 resumption. Previously verify failed because no certificate status is
157 passed on the wire for the restarted session. Fix by using the recorded
158 ocsp status of the stored session for the new connection.
160 JH/29 TLS resumption: the key for session lookup in the client now includes
161 more info that a server could potentially use in configuring a TLS
162 session, avoiding oferring mismatching sessions to such a server.
163 Previously only the server IP was used.
165 JH/30 Fix string_copyn() for limit greater than actual string length.
166 Previously the copied amount was the limit, which could result in a
167 overlapping memcpy for newly allocated destination soon after a
168 source string shorter than the limit. Found/investigated by KM.
170 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
171 close; it may be needed for a subsequent connection. This caused a
172 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
174 JH/32 Fix CHUNKING for a second message on a connection when the first was
175 rejected. Previously we did not reset the chunking-offered state, and
176 erroneously rejected the BDAT command. Investigation help from
179 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
180 an empty address. Previously the expansion returned an error.
182 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
183 proxy. Previously these were misparsed, leading to paniclog entries.
189 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
190 related applications. Previously an "H" was used where available info
191 says that "M" should be, so change to match.
193 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
194 as arguments, so an implementation trying to copy these into a local
195 buffer was taking a taint-enforcement trap. Fix by using dynamically
196 created buffers. Similar fix for radius expansion condition.
198 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
199 reasonable, eg. to count headers. Fix by using dynamically created
200 buffers rather than a local. Do similar fixes for ACL actions "dcc",
201 "log_reject_target", "malware" and "spam"; the arguments are expanded
202 so could be handling tainted values.
204 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
205 broken the (no-op) support for this sendmail command. Restore it
206 to doing nothing, silently, and returning good status.
208 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
209 record path was given (or the default used) without a leading directory
210 path, an error occurred on trying to open it. Use the transport's working
213 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
214 transport. Previously it was the name on the DNS A-record; use instead
215 the head of the CNAME chain leading there (if there is one). This seems
216 to align better with RFC 6125.
218 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
219 smtp_accept_max_per_host allocated resources which were not released
220 when the limit was exceeded. This eventually crashed the daemon. Fix
221 by adding a release action in that path.
223 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
224 expanded; previously using tainted values was rejected. Fix by using
225 dynamically-created buffers.
227 JH/09 Relax restrictions on ACL verify condition needing access to message
228 headers. Previously they were only permitted in data and non-smtp ACLs;
229 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
230 not_blind, header_sender and header_names_ascii verification.
232 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
233 Previously a macro used one argument twice; when called with the
234 argument as an expression having side-effects, incorrect operation
235 resulted. Use an inlineable function.
237 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
238 held open for a verify callout. Previously this wan not accounted for
239 and a corrupt onward SMTP conversation resulted.
241 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
242 Previously they were embedded naively in the constructed address; when
243 needed, strip the quoting and quote the entire local_part.
244 Also make the inbound_srs expansion condition handle quoting.
246 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
247 excluded, not matching the documentation.
249 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
250 was given for the sqlite_dbfile a trap resulted.
252 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
253 "name" argument resulted in a trap. There is no reason to disallow such;
254 this was a coding error.
256 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
257 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
258 spent suspended, ignoring the POSIX definition. Previously we assumed
259 it did and a constant offset from real time could be used as a correction.
260 Change to using the same clock source for the start-of-message and the
261 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
262 exists, just to get a clock slightly more aligned to reality.
264 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
265 RFC says it is optional some validators care. The missing char was not
266 intended but triggered by a line-wrap alignment. Discovery and fix by
267 Guillaume Outters, hacked on by JH.
269 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
270 name being quoted was tainted a trap would be taken. Fix by using
271 dynamically created buffers. The routine could have been called by a
272 rewrite with the "h" flag, by using the "-F" command-line option, or
273 by using a "name=" option on a control=submission ACL modifier.
275 JH/19 SPF: change the Authentication-Results expansion component to give
276 smtp.helo when the sender domain is empty. Previously it gave
279 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
280 not in 127.0.0.0/8 to help in spotting list domains taken over by a
281 domain-parking registrar.
283 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
284 Previously when a whitespace character was specified it was not inserted
285 after removing the newline.
287 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
288 the domain part of the recipient address. This overrides any tls_sni
289 option set, which was previously used.
291 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
294 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
295 is_tainted() had an off-by-one error in the overenthusiastic direction.
296 Find and fix by Gavan. Although NetBSD is not a supported platform for
297 4.94 this bug could affect other platforms.
299 PP/01 Fix default prime selection to be consistent.
300 One path used ike23 still, instead of exim.dev.20160529.3; now both
301 execution flows will use the same DH primes (currently
302 exim.dev.20160529.3).
304 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
305 option in smtp transport, to match the documentation. Previously
306 verification was not being done in some cases where it should have been.
308 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
309 than one server was defined and depending on the platform memory layout
310 details, an internal consistency trap could be hit while walking the list
313 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
314 files. The value is used by the authresults expansion item. Previously
315 if this was used in a router or transport, a crash could result.
317 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
318 have a sufficient incidence of EINTR returns from select that an
319 interaction with other operations done by the main daemon loop exposed
320 a bug in the error-handling. This was benign apart from the log
323 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
324 for consistency with delivered "=>" and failed "**" lines. While we're
325 there, handle PRX and TFO.
327 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
328 applied. This resulted, if any header-line rewrite rules were configured,
329 in a panic-log triggerable by sending a message with a long address in
330 a header. Fix by increasing the arbitrary limit to larger than a single
331 (dewrapped) 5322 header line maximum size.
333 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
334 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
335 RFC 6648 which deprecates X- options in protocols as a general practice.
336 Changeover between the implementations is handled by the mechanisms
339 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
340 a remote which uses callout/hold. Previously the local was queued.
342 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
345 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
346 log line. The asterisk is now consistently appended to the remote IP
347 (and port, if given), and will also be provided on defer and fail log
348 lines. Previously it could be placed on the local IP if that was being
349 logged, and was only provided on delivery lines.
351 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
353 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
354 authenticator client_send option. Previously the next char, after a pair
355 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
356 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
357 documentation. There is still no way to get a leading ^ immediately
358 after a NUL (ie. for the password of a PLAIN method authenticator.
360 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
361 files. For bad sizes read, delete the record and whine to paniclog.
363 JH/38 When logging an AUTH failure, as server, do not include sensitive
364 information. Previously, the credentials would be included if given
365 as part of the AUTH command line and an ACL denied authentication.
367 JH/39 Bug 2691: fix $local_part_data. When the matching list element
368 referred to a file, bad data was returned. This likely also affected
371 JH/40 The gsasl authenticator now supports caching of the salted password
372 generated by the client-side implementation. This required the addition
373 of a new variable: $auth4.
375 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
376 left undeleted; the attempt to re-create it then failed - resulting in
377 the usual "SIGHUP tp have daemon reload configuration" to not work.
378 This affected any platform not supporting "abstract" Unix-domain
379 sockets (i.e. not Linux).
381 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
382 recipients" response to RCPT in a later response, with a 250. The
383 previous coding assumed this would not happen, and under PIPELINING
384 would result in both lost and duplicate recipients for a message.
386 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
387 Previously the weighting was incorrectly applied. Similar fix for socks
388 proxies. Found and fixed by Heiko Schlichting.
390 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
391 not handle sub-lists included using the +namedlist syntax. While
392 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
393 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
396 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
397 Previously the permanent pool was used, so the sore could not be freed.
398 This meant a connection with many messages would use continually-growing
401 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
402 per-pool so as not to waste too much space. Previously a constant size
403 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
404 DOS attacks harder. The cost is wasted memory use in the larger blocks.
406 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
407 same space repeatedly, and a smaller process footprint.
409 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
410 for GnuTLS. Previously the name started "%s" which, while not a bug,
411 looked as if if might be one.
413 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
414 "continued connection") make the $proxy_* variables available. Previously
415 the information was not passed across the exec() call for subsequent
416 transport executions. This also mean that the log lines for the
417 messages can show the proxy information.
419 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
420 receive time. With modern systems the difference is significant.
421 The historical behaviour can be restored by disabling (a new) log_selector
422 "queue_time_exclusive".
424 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
425 content) were specifically tested for. Now, also cover expansions
426 resulting in ACL names and inline ACL content.
428 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
429 making it unusable in complex expressions.
431 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
432 fail with a taint-check on the spoolfile name, and leave the message
435 HS/01 Enforce absolute PID file path name.
437 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
439 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
441 PP/02 Bug 2643: Correct TLS DH constants.
442 A missing NUL termination in our code-generation tool had led to some
443 incorrect Diffie-Hellman constants in the Exim source.
444 Reported by kylon94, code-gen tool fix by Simon Arlott.
446 PP/03 Impose security length checks on various command-line options.
447 Fixes CVE-2020-SPRSS reported by Qualys.
449 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
450 better. Reported by Qualys.
452 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
453 providing a particularly obnoxious sender full name.
456 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
458 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
461 PP/08 Change default for recipients_max from unlimited to 50,000.
463 PP/09 Fix security issue with too many recipients on a message (to remove a
464 known security problem if someone does set recipients_max to unlimited,
465 or if local additions add to the recipient list).
466 Fixes CVE-2020-RCPTL reported by Qualys.
468 PP/10 Fix security issue in SMTP verb option parsing
469 Fixes CVE-2020-EXOPT reported by Qualys.
471 PP/11 Fix security issue in BDAT state confusion.
472 Ensure we reset known-good where we know we need to not be reading BDAT
473 data, as a general case fix, and move the places where we switch to BDAT
474 mode until after various protocol state checks.
475 Fixes CVE-2020-BDATA reported by Qualys.
477 HS/03 Die on "/../" in msglog file names
479 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
480 the Exim runtime user are allowed to create files.
482 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
485 QS/03 When reading the output from interpreted forward files we do not
486 pass the pipe between the parent and the interpreting process to
487 executed child processes (if any).
489 QS/04 Always die if requested from internal logging, even is logging is
492 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
493 the API; compilation noo longer completes with DMARC support included.
494 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
495 been reported on other platforms.
497 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
499 JH/56 Make the majority of info read from config files readonly, for defence-in-
500 depth against exploits. Suggestion by Qualys.
501 Not supported on Solaris 10.
503 JH/57 Fix control=fakreject for a custom message containing tainted data.
504 Previously this resulted in a log complaint, due to a re-expansion present
505 since fakereject was originally introduced.
507 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
508 modifier was given, a loop resulted.
510 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
511 pipelined SMTP command followed the BDAT LAST then it would be
512 incorrectly treated as part of the message body, causing a verification
515 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
516 require looser validation rules than those for 821-level addresses,
517 which only permit IP addresses.
523 JH/01 Avoid costly startup code when not strictly needed. This reduces time
524 for some exim process initialisations. It does mean that the logging
525 of TLS configuration problems is only done for the daemon startup.
527 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
529 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
530 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
533 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
534 DKIM signing is being done. Previously a transport_filter would always
535 disable CHUNKING, falling back to traditional DATA.
537 JH/05 Regard command-line recipients as tainted.
539 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
541 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
542 PAM library frees one of the arguments given to it, despite the
543 documentation. Therefore a plain malloc must be used.
545 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
546 on-stack buffers were used, resulting in a taint trap when DSN information
547 copied from a received message was written into the buffer.
549 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
550 the ordering of its ARC headers. This caused a crash.
552 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
553 a new record was being constructed with information from the peer, a trap
556 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
557 installation would get error messages from DMARC verify, when it hit the
558 nonexistent file indicated by the default. Distros wanting DMARC enabled
559 should both provide the file and set the option.
560 Also enforce no DMARC verification for command-line sourced messages.
562 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
563 could, depending on the platform, hang at the STARTTLS response.
565 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
566 message on a connection. Previously if one message had ARC headers and
567 the following one did not, a crash could result when adding an
568 Authentication-Results: header.
570 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
571 Exim main code and Exim-related utities. The introduction of taint
572 tracking also did many adjustments to string handling. Since then, eximon
573 frequently terminated with an assert failure.
575 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
576 check for 452 responses. This slightly helps the inefficieny of doing
577 a large alias-expansion into a recipient-limited target. The max_rcpt
578 transport option still applies (and at the current default, will override
579 the new feature). The check is done for either cause of synch, and forces
580 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
581 connection. The new facility is not tunable at this time.
583 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
584 library live data was being used, so the results became garbage. Make
585 copies while it is still usable.
587 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
588 on delivery deferred (==) and failed (**) lines (if a delivery was
589 attemtped). Previously it was only on completion (=>) lines.
591 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
592 for the expansion of the server_scram_iter and server_scram_salt options.
594 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
595 are now specifically given a NO_DATA response without hitting the system
596 resolver. The library goes on to do the now-standard TXT lookup.
597 Use of dnsdb lookups is not affected.
599 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
600 only retrieve the errormessage once. Previously two calls to dlerror()
601 were used, and the second one (for mainlog/paniclog) retrieved null
604 JH/20 Taint checking: disallow use of tainted data for
605 - the appendfile transport file and directory options
606 - the pipe transport command
607 - the autoreply transport file, log and once options
608 - file names used by the redirect router (including filter files)
610 - paths used by single-key lookups
611 Previously this was permitted.
613 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
614 adjusted the size of a major service buffer; this failed because the
615 buffer was in use at the time. Change to a compile-time increase in the
616 buffer size, when this authenticator is compiled into exim.
618 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
619 previous fast-mode was untenable in the face of glibs using mmap to
620 support larger malloc requests.
622 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
623 New values supported, if defined on system where compiled:
624 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
625 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
627 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
628 running a limited number of proceses in parallel, a benefit is gained. The
629 amount varies with the platform hardware and load. The use of the option
630 queue_run_in_order means we cannot do this, as ordering becomes
633 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
634 had introduced a string-copy (for ensuring NUL-termination) which was not
635 appropriate for that case, which can include embedded NUL bytes in the
636 block of data. Investigation showed the copy to actually be needless, the
637 data being length-specified.
639 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
640 done during a receiving connection, and both used TLS, global info was
641 used rather than per-connection info for tracking the state of data
642 queued for transmission. This could result in a connection hang.
644 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
645 Previously, when delivering serveral messages down a single connection
646 only the first would provide a SIZE. This was due to the size information
647 not being properly tracked.
649 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
650 TAI (at 37 seconds currently), pretend to be in UTC for time-related
651 expansion and logging. Previously, spurious values such as a future
652 minute could be seen.
654 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
655 it could crash from a null-deref. This could also affect the
656 ${addresses: } operator and ${readsock } item.
658 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
659 message following a mime one, the variable was not reset.
661 JH/30 When an pipelined-connect fails at the first response, assume incorrect
662 cached capability (perhaps the peer reneged?) and immediately retry in
665 JH/31 Fix spurious detection of timeout while writing to transport filter.
667 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
668 an attempt to copy the string was made before checking it.
670 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
671 taint of the lookup key was maintained; we now regard the presence in the
672 filesystem as sufficient validation.
674 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
675 argument is supplied.
677 JH/35 The dsearch lookup now requires that the directory is an absolute path.
678 Previously this was not checked, and nonempty relative paths made an
679 access under Exim's current working directory.
681 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
682 Previously no event was raised.
684 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
685 parameter supplied by the sender MAIL FROM command. Previously it was
686 ignored, and only the check_spool_space option value for the required
689 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
690 the size of the signing public-key. Previously it was instead giving
691 the size of the signature hash.
693 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
694 the default. See the (new) dkim_verify_min_keysizes option.
696 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
697 and an ACL use a lookup for checking either the local_part or domain,
698 stale data could be accessed. Ensure that variable references are
699 dropped between messages.
701 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
702 by the client was not checked as pointing within response data before
703 being used. A malicious client could thus cause an out-of-bounds read and
704 possibly gain authentication. Fix by adding the check.
706 JH/42 Internationalisation: change the default for downconversion in the smtp
707 transport to be "if needed". Previously it was "as previously set" for
708 the message, which usually meant "if needed" for message-submission but
709 "no" for everything else. However, MTAs have been seen using SMTPUTF8
710 even when the envelope addresses did not need it, resulting in forwarding
711 failures to non-supporting MTAs. A downconvert in such cases will be
712 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
713 transport. The change does mean that addresses needing conversion will
714 be converted when previously a delivery failure would occur.
716 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
717 response was received it would be used unchecked in a fail-DSN, violating
718 standards on line-length limits. Truncate if needed.
720 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
721 doesn't work. (Additionally add a new main config option to configure the
728 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
729 side, to decode a TLS 1.3 packet capture.
731 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
732 Previously the default library behaviour applied, sending two, each in
735 JH/03 Debug output for ACL now gives the config file name and line number for
738 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
740 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
742 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
743 buffer overrun for (non-chunking) other transports.
745 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
746 TLS1.3, means that a server rejecting a client certificate is not visible
747 to the client until the first read of encrypted data (typically the
748 response to EHLO). Add detection for that case and treat it as a failed
749 TLS connection attempt, so that the normal retry-in-clear can work (if
750 suitably configured).
752 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
753 and/or domain. Found and fixed by Jason Betts.
755 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
756 configuration). If a CNAME target was not a wellformed name pattern, a
759 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
760 the OS reports them interleaved with other addresses.
762 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
763 used both for input and for a verify callout, both encrypted, SMTP
764 responses being sent by the server could be lost. This resulted in
765 dropped connections and sometimes bounces generated by a peer sending
768 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
769 string. Previously it was possible to cause undefined behaviour in a
770 library routine (usually a crash). Found by "zerons".
772 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
775 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
776 API was removed, so update to use the newer ones.
778 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
779 any timeout set, is taking a long time. Previously we would hang on to a
780 rotated logfile "forever" if the input was arriving with long gaps
781 (a previous attempt to fix addressed lack, for a long time, of initial
784 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
785 shared (NFS) environment. The length of the tempfile name is now
786 4 + 16 ("hdr.$message_exim_id") which might break on file
787 systems which restrict the file name length to lower values.
790 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
791 shared (NFS) environment.
793 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
794 did for all versions <4.90). Notably -M, -m, --invert, -I may be
797 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
798 on some platforms for bit 31.
800 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
801 to changes apparently associated with TLS1.3 handling some of the APIs
802 previously used were either nonfunctional or inappropriate. Strings
803 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
804 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
805 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
806 This affects log line X= elements, the $tls_{in,out}_cipher variables,
807 and the use of specific cipher names in the encrypted= ACL condition.
809 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
811 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
812 verification result was not updated unless hosts_require_ocsp applied.
814 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
815 queue_list_requires_admin set to false, non-admin users were denied the
818 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
819 directory-of-certs mode. Previously they were advertised despite the
822 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
823 A single TCP connection by a client will now hold a TLS connection open
824 for multiple message deliveries, by default. Previously the default was to
827 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
828 default. If built with the facility, DANE will be used. The facility
829 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
831 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
832 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
833 must be defined and you must still, unless you define DISABLE_TLS, manage
834 the the include-dir and library-file requirements that go with that
835 choice. Non-TLS builds are still supported.
837 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
840 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
841 default. If the platform supports and has the facility enabled, it will
842 be requested on all coneections.
844 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
845 controlled by the build-time option SUPPORT_PIPE_CONNECT.
847 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
849 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
850 success-DSN messages. Previously the From: header was always the default
851 one for these; the option was ignored.
853 JH/28 Fix the timeout on smtp response to apply to the whole response.
854 Previously it was reset for every read, so a teergrubing peer sending
855 single bytes within the time limit could extend the connection for a
856 long time. Credit to Qualsys Security Advisory Team for the discovery.
858 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
859 delivery address, which leaked information of the results of local
860 forwarding. Change to the original envelope recipient address, per
863 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
864 requested. Previously not bounce was generated and a log entry of
865 error ignored was made.
867 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
869 JH/32 Introduce a general tainting mechanism for values read from the input
870 channel, and values derived from them. Refuse to expand any tainted
871 values, to catch one form of exploit.
873 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
874 was unused and the unexpanded text used for the test. Found and
875 fixed by Ruben Jenster.
877 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
878 an attempt to use a TLS library read routine dereffed a nul pointer,
881 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
882 them in our smtp response.
884 JH/36 Have the general router option retry_use_local_part default to true when
885 any of the restrictive preconditions are set (to anything). Previously it
886 was only for check_local user. The change removes one item of manual
887 configuration which is required for proper retries when a remote router
888 handles a subset of addresses for a domain.
890 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
891 link count into consideration.
893 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
894 caused the extension of big_buffer, the following lines were ignored.
896 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
897 accordance with RFC 2308. Previously there was no expiry, so a longlived
898 receive process (eg. due to ACL delays) versus a short SOA value could
901 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
903 JH/39 Promote DMARC support to mainline.
905 JH/40 Bug 2452: Add a References: header to DSNs.
907 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
908 parameters. The relevant library call is documented as "Deprecated: This
909 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
910 3.6.0, DH parameters are negotiated following RFC7919."
912 HS/06 Change the default of dnssec_request_domains to "*"
914 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
915 carried on and emitted a BDAT command, even when PIPELINING was not
918 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
919 buffer was used for the filename, resulting in a trap when tainted
920 arguments (eg. $domain) were used.
922 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
923 recommended to avoid a possible server-load attack. The feature can be
924 re-enabled via the openssl_options main cofiguration option.
926 JH/45 local_scan API: documented the current smtp_printf() call. This changed
927 for version 4.90 - adding a "more data" boolean to the arguments.
928 Bumped the ABI version number also, this having been missed previously;
929 release versions 4.90 to 4.92.3 inclusive were effectively broken in
930 respect of usage of smtp_printf() by either local_scan code or libraries
931 accessed via the ${dlfunc } expansion item. Both will need coding
932 adjustment for any calls to smtp_printf() to match the new function
933 signature; a FALSE value for the new argument is always safe.
935 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
936 the file-offset (which the Linux syscall does, and exim expects); this
937 resulted in an indefinite loop.
939 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
940 to do ARC verification. The Authentication-Results: header line added
941 by the configuration then had no ARC item.
943 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
944 an incorrect mode was used for reading the result, resulting in it being
951 JH/01 Remove code calling the customisable local_scan function, unless a new
952 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
954 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
955 non-signal-safe functions being used.
957 JH/03 Bug 2269: When presented with a received message having a stupidly large
958 number of DKIM-Signature headers, disable DKIM verification to avoid
959 a resource-consumption attack. The limit is set at twenty.
961 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
962 report of oldest_pass in ${authres } in consequence, and separate out
963 some descriptions of reasons for verification fail.
965 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
966 files in the spool were present and unlocked. A queue-runner could spot
967 them, resulting in a duplicate delivery. Fix that by doing the unlock
968 after the unlink. Investigation by Tim Stewart. Take the opportunity to
969 add more error-checking on spoolfile handling while that code is being
972 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
973 No known attacks, no CVE, this is defensive hardening.
975 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
976 a queue-runner could start a delivery while other operations were ongoing.
977 Cutthrough delivery was a common victim, resulting in duplicate delivery.
978 Found and investigated by Tim Stewart. Fix by using the open message data
979 file handle rather than opening another, and not locally closing it (which
980 releases a lock) for that case, while creating the temporary .eml format
981 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
983 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
984 $sender_verify_failure/$recipient_verify_failure to "random".
986 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
989 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
990 Previously this would segfault.
992 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
995 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
996 like zero, since the resolver should be doing this for us, But we need one
997 as a CNAME but no MX presence gets the CNAME returned; we need to check
998 that doesn't point to an MX to declare it "no MX returned" rather than
999 "error, loop". A new main option is added so the older capability of
1000 following some limited number of chain links is maintained.
1002 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1004 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1005 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1006 now-deprecated earlier definitions used only specified the range up to TLS
1007 1.2 (in the older-version library docs).
1009 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1011 JH/15 Rework TLS client-side context management. Stop using a global, and
1012 explicitly pass a context around. This enables future use of TLS for
1013 connections to service-daemons (eg. malware scanning) while a client smtp
1014 connection is using TLS; with cutthrough connections this is quite likely.
1016 JH/16 Fix ARC verification to do AS checks in reverse order.
1018 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1020 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1021 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1022 Previously the "utf8" would be re-prepended for every additional message.
1024 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1025 Previously thery were accepted, resulting in issues when attempting to
1026 forward messages to a non-supporting MTA.
1028 PP/02 Let -n work with printing macros too, not just options.
1030 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1031 one parent address was copied, and bogus data was used at delivery-logging
1032 time. Either a crash (after delivery) or bogus log data could result.
1033 Discovery and analysis by Tim Stewart.
1035 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1036 Previously if the string ended mid-character, we did not insert the
1037 promised '?' replacement.
1039 PP/04 Documentation: current string operators work on bytes, not codepoints.
1041 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1042 should pack well giving a smaller memory footprint so better caching and
1043 therefore performance. Group the declarations where this can't be done so
1044 that the byte-sized flag variables are not interspersed among pointer
1045 variables, giving a better chance of good packing by the compiler.
1047 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1048 non-null, to avoid issues with sites running BATV. Previously reports were
1049 sent with an empty envelope sender so looked like bounces.
1051 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1052 The ignore_error flag wasn't being returned from the filter subprocess so
1053 was not set for later routers. Investigation and fix by Matthias Kurz.
1055 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1056 and a msg:complete for the whole, when a message is manually removed using
1057 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1059 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1060 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1061 hope that is portable enough.
1063 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1064 requiring a known-CA anchor certificate; make it now rely entirely on the
1065 TLSA as an anchor. Checking the name on the leaf cert against the name
1066 on the A-record for the host is still done for TA (but not for EE mode).
1068 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1069 included in delivery lines for non-proxied connections, when compiled with
1070 SUPPORT_SOCKS and running with proxy logging enabled.
1072 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1073 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1074 move the existing event to fire before the normal logging of message
1075 failure so that custom logging is bracketed by normal logging.
1077 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1078 msg:fail:internal event. Developement by Matthias Kurz.
1080 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1081 far too small for todays use of crypto signatures stored there. Go all
1082 the way to the max DNS message size of 64kB, even though this might be
1083 overmuch for IOT constrained device use.
1085 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1086 copy a string over itself. The library routine is documented as not
1087 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1089 JH/32 For main options check_spool_space and check_inode_space, where the
1090 platform supports 64b integers, support more than the previous 2^31 kB
1091 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1092 the previous G, M, k.
1094 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1095 $authenticated_fail_id variable on authentication failure. Previously
1098 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1099 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1100 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1101 GNUTLS_SEC_PARAM_MEDIUM.
1103 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1104 side. Previously we would continue as if no SNI had been received.
1106 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1107 "<" character, which should be a list-separator specification, we walked
1108 off past the nul-terimation.
1110 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1111 causes) even when the retry time is not yet met. Previously they were
1112 not, meaning that when (say) an account was over-quota and temp-rejecting,
1113 and multiple senders' messages were queued, only one sender would get
1114 notified on each configured delay_warning cycle.
1116 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1118 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1119 cipher-suites, an error can be left on the stack even for a succeeding
1120 accept; this results in impossible error messages when a later operation
1123 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1124 return error codes indicating retry. Under TLS1.3 this becomes required.
1126 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1127 it only wrote the new authenticators, resulting in a lack of tracking of
1128 peer changes of ESMTP extensions until the next cache flush.
1130 JH/41 Fix the loop reading a message header line to check for integer overflow,
1131 and more-often against header_maxsize. Previously a crafted message could
1132 induce a crash of the recive process; now the message is cleanly rejected.
1134 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1135 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1141 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1142 When redis_servers is set to a list of > 1 element, and the Redis servers
1143 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1144 case of MOVED into a DEFER case instead, thus moving the query onto the
1145 next server in the list. For a cluster of N elements, all N servers must
1146 be defined in redis_servers.
1148 GF/02 Catch and remove uninitialized value warning in exiqsumm
1149 Check for existence of @ARGV before looking at $ARGV[0]
1151 JH/01 Replace the store_release() internal interface with store_newblock(),
1152 which internalises the check required to safely use the old one, plus
1153 the allocate and data copy operations duplicated in both (!) of the
1154 extant use locations.
1156 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1157 modifier. This matches the restriction on the commandline.
1159 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1160 Previously only the last row was returned.
1162 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1163 we assumed that tags in the header were well-formed, and parsed the
1164 element content after inspecting only the first char of the tag.
1165 Assumptions at that stage could crash the receive process on malformed
1168 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1169 While running the DKIM ACL we operate on the Permanent memory pool so that
1170 variables created with "set" persist to the DATA ACL. Also (at any time)
1171 DNS lookups that fail create cache records using the Permanent pool. But
1172 expansions release any allocations made on the current pool - so a dnsdb
1173 lookup expansion done in the DKIM ACL releases the memory used for the
1174 DNS negative-cache, and bad things result. Solution is to switch to the
1175 Main pool for expansions.
1176 While we're in that code, add checks on the DNS cache during store_reset,
1177 active in the testsuite.
1178 Problem spotted, and debugging aided, by Wolfgang Breyha.
1180 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1181 When none of the hosts presented to a transport match an already-open
1182 connection, close it and proceed with the list. Previously we would
1183 queue the message. Spotted by Lena with Yahoo, probably involving
1186 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1187 Previously a spurious "250 OK id=" response was appended to the proper
1190 JH/08 The "support for" informational output now, which built with Content
1191 Scanning support, has a line for the malware scanner interfaces compiled
1192 in. Interface can be individually included or not at build time.
1194 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1195 by the template makefile "src/EDITME". The "STREAM" support for an older
1196 ClamAV interface method is removed.
1198 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1199 rows affected is given instead).
1201 JH/11 The runtime Berkeley DB library version is now additionally output by
1202 "exim -d -bV". Previously only the compile-time version was shown.
1204 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1205 SMTP connection. Previously, when one had more recipients than the
1206 first, an abortive onward connection was made. Move to full support for
1207 multiple onward connections in sequence, handling cutthrough connection
1208 for all multi-message initiating connections.
1210 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1211 routers. Previously, a multi-recipient message would fail to match the
1212 onward-connection opened for the first recipient, and cause its closure.
1214 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1215 a timeout on read on a GnuTLS initiating connection, resulting in the
1216 initiating connection being dropped. This mattered most when the callout
1217 was marked defer_ok. Fix to keep the two timeout-detection methods
1220 JH/15 Relax results from ACL control request to enable cutthrough, in
1221 unsupported situations, from error to silently (except under debug)
1222 ignoring. This covers use with PRDR, frozen messages, queue-only and
1225 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1227 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1228 metadata, resulting in a crash in free().
1230 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1231 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1232 Broken also in d185889f4, with init system revamp.
1234 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1235 Previously we abruptly closed the connection after reading a malware-
1236 found indication; now we go on to read the "scan ok" response line,
1239 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1240 ACL. Previously, a crash would result.
1242 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1243 macro text after a replacement (previously it was only once per line) and
1244 by skipping builtin macros when searching for an uppercase lead character.
1246 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1247 for the build is renamed.
1249 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1250 was allocated for every new TLS startup, meaning one per message. Fix
1251 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1253 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1254 reported the original. Fix to report (as far as possible) the ACL
1255 result replacing the original.
1257 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1258 OpenSSL. Certificate information is loaded for every new TLS startup,
1259 and the resources needed to be freed.
1261 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1263 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1266 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1267 DATA response info to the (existing) per-recipient response info for
1268 the "C=" log element. It can have useful tracking info from the
1269 destination system. Patch from Simon Arlott.
1271 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1272 length value. Previously this would segfault.
1274 HS/02 Support Avast multiline protoocol, this allows passing flags to
1275 newer versions of the scanner.
1277 JH/28 Ensure that variables possibly set during message acceptance are marked
1278 dead before release of memory in the daemon loop. This stops complaints
1279 about them when the debug_store option is enabled. Discovered specifically
1280 for sender_rate_period, but applies to a whole set of variables.
1281 Do the same for the queue-runner and queue-list loops, for variables set
1282 from spool message files. Do the same for the SMTP per-message loop, for
1283 certain variables indirectly set in ACL operations.
1285 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1286 as a multi-recipient message from a mailinglist manager). The coding had
1287 an arbitrary cutoff number of characters while checking for more input;
1288 enforced by writing a NUL into the buffer. This corrupted long / fast
1289 input. The problem was exposed more widely when more pipelineing of SMTP
1290 responses was introduced, and one Exim system was feeding another.
1291 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1292 receiving system, and refused recipients seen by the sending system
1293 (propating to people being dropped from mailing lists).
1294 Discovered and pinpointed by David Carter.
1296 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1297 replaced by the ${authresults } expansion.
1299 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1301 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1302 allows proper process termination in container environments.
1304 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1305 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1307 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1308 and "err_perm", deprecated since 4.83 when the RFC-defined words
1309 "temperror" and "permerror" were introduced.
1311 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1312 transport-filters or DKIM-signing. The restriction was lost in the
1313 consolidation of verify-callout and delivery SMTP handling.
1314 Extend the restriction to also cover ARC-signing.
1316 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1317 in defer=pass mode supply a 450 to the initiator. Previously the message
1320 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1321 tls_require_ciphers is used as before.
1323 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1324 "pass_unscanned". Only tmpfails from the scanner are written to
1325 the paniclog, as they may require admin intervention (permission
1326 denied, license issues). Other scanner errors (like decompression
1327 bombs) do not cause a paniclog entry.
1329 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1330 Previously it was possible to log spurious information in receive log
1333 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1334 triggered odd behaviour from Outlook Express clients.
1336 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1339 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1340 since the IETF WG has not yet settled on that versus the original
1341 "bare" representation.
1343 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1344 Previously the millisecond value corrupted the output.
1345 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1346 corrupted the output.
1352 JH/01 Rework error string handling in TLS interface so that the caller in
1353 more cases is responsible for logging. This permits library-sourced
1354 string to be attached to addresses during delivery, and collapses
1355 pairs of long lines into single ones.
1357 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1358 during configuration. Wildcards are allowed and expanded.
1360 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1361 This permits better logging.
1363 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1364 do not close it down and have the child transport start it up again on
1365 the passed-on TCP connection. Instead, proxy the child (and any
1366 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1367 affected: the continued delivery log lines do not have any DNSSEC, TLS
1368 Certificate or OCSP information. TLS cipher information is still logged.
1370 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1371 identical IP addresses on different listening ports. Will also affect
1374 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1375 add noisy ifdef guards to special-case this sillyness.
1376 Patch from Bernd Kuhls.
1378 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1379 than 255 are no longer allowed.
1381 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1382 Disable the session-cache too, which might reduce our load. Since we
1383 currrectly use a new context for every connection, both as server and
1384 client, there is no benefit for these.
1385 GnuTLS appears to not support tickets server-side by default (we don't
1386 call gnutls_session_ticket_enable_server()) but client side is enabled
1387 by default on recent versions (3.1.3 +) unless the PFS priority string
1390 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1391 <https://reproducible-builds.org/specs/source-date-epoch/>.
1393 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1394 the check for any unsuccessful recipients did not notice the limit, and
1395 erroneously found still-pending ones.
1397 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1398 MSG_MORE. Only in-clear (not on TLS connections).
1400 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1401 transport-filter is involved we can buffer the headers in memory for
1402 creating the signature, and read the spool data file once for the
1403 signature and again for transmission.
1405 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1406 4.77 as the kernel support then wasn't solid, having issues in 64bit
1407 mode. Now, it's been long enough. Add support for FreeBSD also.
1409 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1410 case where the routing stage had gathered several addresses to send to
1411 a host before calling the transport for the first, we previously failed
1412 to close down TLS in the old transport process before passing the TCP
1413 connection to the new process. The new one sent a STARTTLS command
1414 which naturally failed, giving a failed delivery and bloating the retry
1415 database. Investigation and fix prototype from Wolfgang Breyha.
1417 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1418 false-negatives in the check that the sender had not preempted a response
1419 or prompt from Exim (running as a server), due to that code's lack of
1420 awareness of the SMTP input buffering.
1422 PP/04 Add commandline_checks_require_admin option.
1423 Exim drops privileges sanely, various checks such as -be aren't a
1424 security problem, as long as you trust local users with access to their
1425 own account. When invoked by services which pass untrusted data to
1426 Exim, this might be an issue. Set this option in main configuration
1427 AND make fixes to the calling application, such as using `--` to stop
1430 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1431 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1432 responses to those, into a single TLS record each way (this usually means
1433 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1436 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1437 affects you only if you're dancing at the edge of the param size limits.
1438 If you are, and this message makes sense to you, then: raise the
1439 configured limit or use OpenSSL 1.1. Nothing we can do for older
1442 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1443 cmdline element to get the documented default one. Previously it was
1446 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1447 are unsuable for non-message-specific reasons - eg. connection timeout,
1448 banner-time rejection.
1450 JH/16 Fix logging of delivery remote port, when specified by router, under
1453 PP/06 Repair manualroute's ability to take options in any order, even if one
1454 is the name of a transport.
1457 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1459 JH/17 Change the list-building routines interface to use the expanding-string
1460 triplet model, for better allocation and copying behaviour.
1462 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1463 Previously it was constructed the first time a possibly-matching string
1464 was met in the configuration file input during startup; now it is done
1467 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1468 compatible one, to avoid the (poorly documented) possibility of a config
1469 file in the working directory redirecting the DB files, possibly correpting
1470 some existing file. CVE-2017-10140 assigned for BDB.
1472 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1473 cache-hot. Previously, although the result was properly cached, the
1474 initial verify call returned a defer.
1476 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1477 the main verify for receipient in uncached-mode.
1479 JH/22 Retire historical build files to an "unsupported" subdir. These are
1480 defined as "ones for which we have no current evidence of testing".
1482 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1483 if present. Previously it was ignored.
1485 JH/24 Start using specified-initialisers in C structure init coding. This is
1486 a C99 feature (it's 2017, so now considered safe).
1488 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1489 if was a fixed-sized field and bitmask ops via macros; it is now more
1492 PP/07 GitHub PR 56: Apply MariaDB build fix.
1493 Patch provided by Jaroslav Škarvada.
1495 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1496 during Coverity cleanups [4.87 JH/47]
1497 Diagnosis and fix provided by Michael Fischer v. Mollard.
1499 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1500 the right size to place the terminating semicolon on its own folded
1501 line, the header hash was calculated to an incorrect value thanks to
1502 the (relaxed) space the fold became.
1504 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1505 and confused the parent.
1507 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1508 which could crash as a result. This could lead to undeliverable messages.
1510 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1513 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1514 matters on fast-turnover and PID-randomising systems, which were getting
1515 out-of-order delivery.
1517 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1518 a possibly-overlapping copy. The symptom was that "Remote host closed
1519 connection in response to HELO" was logged instead of the actual 4xx
1522 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1523 Previously only that bufferd was discarded, resulting in SYMTP command
1526 JH/32 DKIM: when a message has multiple signatures matching an identity given
1527 in dkim_verify_signers, run the dkim acl once for each. Previously only
1528 one run was done. Bug 2189.
1530 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1531 "panic the current process" to "deliberately defer". The panic log is
1532 still written with the problem list name; the mail and reject logs now
1533 get a temp-reject line for the message that was being handled, saying
1534 something like "domains check lookup or other defer". The SMTP 451
1535 message is still "Temporary local problem".
1537 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1538 A crafted sequence of BDAT commands could result in in-use memory beeing
1539 freed. CVE-2017-16943.
1541 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1542 from SMTP input. Previously it was always done; now only done for DATA
1543 and not BDAT commands. CVE-2017-16944.
1545 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1546 to the message (such as an overlong header line). Previously this was
1547 not done and we did not exit BDAT mode. Followon from the previous item
1548 though a different problem.
1554 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1555 than -2003 did; needs libidn2 in addition to libidn.
1557 JH/02 The path option on a pipe transport is now expanded before use.
1559 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1560 Patch provided by "Björn", documentation fix added too.
1562 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1563 missing a wire-to-host endian conversion.
1565 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1566 close after a BDAT command line could be taken as a following command,
1567 giving a synch failure. Fix by only checking for synch immediately
1568 before acknowledging the chunk.
1570 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1571 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1572 macro. Patches provided by Josh Soref.
1574 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1575 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1576 by IANA as a service extension. However, John Klensin suggests that we
1579 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1580 the dkim code may be unix-mode line endings rather than smtp wire-format
1581 CRLF, so prepend a CR to any bare LF.
1583 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1584 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1586 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1587 the first were themselves being wrongly included in the feed into dkim
1588 processing; with most chunk sizes in use this resulted in an incorrect
1589 body hash calculated value.
1591 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1592 DKIM signature block, for verification. Although advised against by
1593 standards it is specifically not ruled illegal.
1595 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1597 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1598 missing a body hash (the bh= tag).
1600 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1601 It seems that HAProxy sends the Proxy Protocol information in clear and
1602 only then does a TLS startup, so do the same.
1604 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1605 TCP connections (such as for Spamd) unless the daemon successfully set
1606 Fast Open mode on its listening sockets. This fixes breakage seen on
1607 too-old kernels or those not configured for Fast Open, at the cost of
1608 requiring both directions being enabled for TFO, and TFO never being used
1609 by non-daemon-related Exim processes.
1611 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1612 endings, at least on the first header line. Try to canonify any that get
1613 past that check, despite the cost.
1615 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1616 now limited to an arbitrary five deep, while parsing addresses with the
1617 strip_excess_angle_brackets option enabled.
1619 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1620 instead leave the unprompted TLS handshake in socket buffer for the
1621 TLS library to consume.
1623 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1625 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1627 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1628 region in one operation, for speed, and this leaves assigned pointers
1629 dangling. Add checks run only under the testsuite which checks all
1630 variables at a store-reset and panics on a dangling pointer; add code
1631 explicitly nulling out all the variables discovered. Fixes one known
1632 bug: a transport crash, where a dangling pointer for $sending_ip_address
1633 originally assigned in a verify callout, is re-used.
1635 PP/06 Drop '.' from @INC in various Perl scripts.
1637 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1639 PP/08 Reduce a number of compilation warnings under clang; building with
1640 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1641 should be warning-free.
1643 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1645 HS/01 Fix portability problems introduced by PP/08 for platforms where
1646 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1648 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1649 chunk. This allows us to accept broken chunked messages. We need a more
1650 general solution here.
1652 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1653 already-broken messages in the queue.
1655 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1657 JH/19 Fix reference counting bug in routing-generated-address tracking.
1663 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1664 supports it and a size is available (ie. the sending peer gave us one).
1666 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1667 years of being deprecated). The replacements are the ACLs
1668 acl_smtp_mime and acl_not_smtp_mime.
1670 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1671 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1672 or even an in-clear connection were permitted. Now, if the host lookup
1673 was dnssec and dane was requested then the host is only used if the
1674 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1675 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1676 if one fails this test.
1677 This means that a poorly-configured remote DNS will make it incommunicado;
1678 but it protects against a DNS-interception attack on it.
1680 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1681 non-noisy when a race steals the message being considered.
1683 JH/05 If main configuration option tls_certificate is unset, generate a
1684 self-signed certificate for inbound TLS connections.
1686 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1687 in rewrites and routers.
1689 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1690 and logged a warning sing 4.83; now they are a configuration file error.
1692 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1693 (lacking @domain). Apply the same qualification processing as RCPT.
1695 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1697 JH/10 Support ${sha256:} applied to a string (as well as the previous
1700 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1701 a cutthrough deliver is pending, as we always want to make a connection.
1702 This also avoids re-routing the message when later placing the cutthrough
1703 connection after a verify cache hit.
1704 Do not update it with the verify result either.
1706 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1707 when routing results in more than one destination address.
1709 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1710 signing (which inhibits the cutthrough capability). Previously only
1711 the presence of an option was tested; now an expansion evaluating as
1712 empty is permissible (obviously it should depend only on data available
1713 when the cutthrough connection is made).
1715 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1716 the relevant preceding SMTP command did not note the pipelining mode.
1718 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1719 Previously they were not counted.
1721 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1722 as one having no matching records. Previously we deferred the message
1723 that needed the lookup.
1725 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1726 distinguished as "(=".
1728 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1729 for missing MX records. Previously it only worked for missing A records.
1731 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1733 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1734 after the data-go-ahead and data-ack. Patch from Jason Betts.
1736 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1737 even for a "none" policy. Patch from Tony Meyer.
1739 JH/22 Fix continued use of a connection for further deliveries. If a port was
1740 specified by a router, it must also match for the delivery to be
1743 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1744 When one of the recipients of a message was unsuitable for the connection
1745 (has no matching addresses), we lost track of needing to mark it
1746 deferred. As a result mail would be lost.
1748 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1750 JH/25 Decoding ACL controls is now done using a binary search; the source code
1751 takes up less space and should be simpler to maintain. Merge the ACL
1752 condition decode tables also, with similar effect.
1754 JH/26 Fix problem with one_time used on a redirect router which returned the
1755 parent address unchanged. A retry would see the parent address marked as
1756 delivered, so not attempt the (identical) child. As a result mail would
1759 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1760 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1761 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1764 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1765 Main config options check_{log,spool}_{inodes,space} are now
1766 100 inodes, 10MB unless set otherwise in the configuration.
1768 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1769 Previously it only applied to the main-section connection policy
1772 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1774 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1775 by me. Added RFC7919 DH primes as an alternative.
1777 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1778 are not in the system include path.
1780 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1781 GnuTLS, when a session startup failed (eg because the client disconnected)
1782 Exim did stdio operations after fclose. This was exposed by a recent
1783 change which nulled out the file handle after the fclose.
1785 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1786 signed directly by the cert-signing cert, rather than an intermediate
1787 OCSP-signing cert. This is the model used by LetsEncrypt.
1789 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1791 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1792 an incoming connection.
1794 HS/02 Bug 1802: Do not half-close the connection after sending a request
1797 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1798 fallback to "prime256v1".
1800 JH/34 SECURITY: Use proper copy of DATA command in error message.
1801 Could leak key material. Remotely exploitable. CVE-2016-9963.
1807 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1808 and 3.4.4 - once the server is enabled to respond to an OCSP request
1809 it does even when not requested, resulting in a stapling non-aware
1810 client dropping the TLS connection.
1812 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1813 support variable-length bit vectors. No functional change.
1815 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1816 The I= interface field on outgoing lines is now after the H= remote
1817 host field, same as incoming lines. There is a separate
1818 outgoing_interface log selector which allows you to disable the
1821 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1822 If not running log_selector +smtp_connection the mainlog would be held
1823 open indefinitely after a "too many connections" event, including to a
1824 deleted file after a log rotate. Leave the per net connection logging
1825 leaving it open for efficiency as that will be quickly detected by the
1826 check on the next write.
1828 HS/01 Bug 1671: Fix post transport crash.
1829 Processing the wait-<transport> messages could crash the delivery
1830 process if the message IDs didn't exist for some reason. When
1831 using 'split_spool_directory=yes' the construction of the spool
1832 file name failed already, exposing the same netto behaviour.
1834 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1835 mime_regex ACL conditions.
1837 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1838 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1839 to HELO, local diagnostic string.
1841 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1842 log line to debug. Even when configured with a tls authenticator many
1843 client connections are expected to not authenticate in this way, so
1844 an authenticate fail is not an error.
1846 HS/02 Add the Exim version string to the process info. This way exiwhat
1847 gives some more detail about the running daemon.
1849 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1850 matter for fast-change records such as DNSBLs.
1852 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1853 retry record, even if constant. There may be multiple transports with
1854 different interface settings and the retry behaviour needs to be kept
1857 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1859 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1861 JH/10 Bug 840: fix log_defer_output option of pipe transport
1863 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1864 hosts_randomize. This matters a lot when combined with mua_wrapper.
1866 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1867 ${quote_pgsql:<string>} operator.
1869 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1871 JH/14 Change header file name for freeradius-client. Relevant if compiling
1872 with Radius support; from the Gentoo tree and checked under Fedora.
1874 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1876 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1877 option transport_filter, meaning no filtering.
1879 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1881 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1882 defaults to "*" (all hosts). The variable is now available when not built
1883 with TLS, default unset, mainly to enable keeping the testsuite sane.
1884 If a server certificate is not supplied (via tls_certificate) an error is
1885 logged, and clients will find TLS connections fail on startup. Presumably
1886 they will retry in-clear.
1887 Packagers of Exim are strongly encouraged to create a server certificate
1888 at installation time.
1890 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1891 with the $config_file variable.
1893 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1894 in transport context, after the attempt, and per-recipient. The latter type
1895 is per host attempted. The event data is the error message, and the errno
1896 information encodes the lookup type (A vs. MX) used for the (first) host,
1897 and the trailing two digits of the smtp 4xx response.
1899 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1900 to write to mainlog (or rejectlog, paniclog) in the window between file
1901 creation and permissions/ownership being changed. Particularly affects
1902 installations where exicyclog is run as root, rather than exim user;
1903 result is that the running daemon panics and dies.
1905 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1907 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1908 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1909 "pri" and "weight". Note that the previous implicit priority given by the
1910 list order is no longer honoured.
1912 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1913 for DKIM processing.
1915 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1916 by defining SUPPORT_SOCKS.
1918 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1919 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1920 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1921 variables are renamed to proxy_{local,external}_{address,port}.
1923 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1924 for a build by defining SUPPORT_I18N
1926 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1927 of the query string, and make ${quote_redis:} do that quoting.
1929 JH/29 Move Events support from Experimental to mainline, enabled by default
1930 and removable for a build by defining DISABLE_EVENT.
1932 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1934 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1935 cached by the daemon.
1937 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1938 by defining LOOKUP_REDIS. The libhiredis library is required.
1940 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1941 keys are given for lookup.
1943 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1944 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1945 only supported when built with TLS support. The PolarSSL SHA routines
1946 are still used when the TLS library is too old for convenient support.
1948 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1949 openssl_options), for security. OpenSSL forces this from version 1.1.0
1950 server-side so match that on older versions.
1952 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1953 allocation for $value could be released as the expansion processing
1954 concluded, but leaving the global pointer active for it.
1956 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1957 and to use the domains and local_parts ACL conditions.
1959 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1960 incorrectly not doubled on cutthrough transmission, hence seen as a
1961 body-termination at the receiving system - resulting in truncated mails.
1962 Commonly the sender saw a TCP-level error, and retransmitted the message
1963 via the normal store-and-forward channel. This could result in duplicates
1964 received - but deduplicating mailstores were liable to retain only the
1965 initial truncated version.
1967 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1969 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1971 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1972 we're in there, support oversigning also; bug 1309.
1974 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1976 HS/04 Add support for keep_environment and add_environment options.
1978 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1979 either intentional arithmetic overflow during PRNG, or testing config-
1982 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1983 delivery resulted in actual delivery. Cancel cutthrough before DATA
1986 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1987 rejects a recipient: pass the reject to the originator.
1989 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1990 Many were false-positives and ignorable, but it's worth fixing the
1993 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1994 for the new environment-manipulation done at startup. Move the routines
1995 from being local to tls.c to being global via the os.c file.
1997 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1998 an extract embedded as result-arg for a map, the first arg for extract
1999 is unavailable so we cannot tell if this is a numbered or keyed
2000 extraction. Accept either.
2006 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2009 JH/02 The smtp transport option "multi_domain" is now expanded.
2011 JH/03 The smtp transport now requests PRDR by default, if the server offers
2014 JH/04 Certificate name checking on server certificates, when exim is a client,
2015 is now done by default. The transport option tls_verify_cert_hostnames
2016 can be used to disable this per-host. The build option
2017 EXPERIMENTAL_CERTNAMES is withdrawn.
2019 JH/05 The value of the tls_verify_certificates smtp transport and main options
2020 default to the word "system" to access the system default CA bundle.
2021 For GnuTLS, only version 3.0.20 or later.
2023 JH/06 Verification of the server certificate for a TLS connection is now tried
2024 (but not required) by default. The verification status is now logged by
2025 default, for both outbound TLS and client-certificate supplying inbound
2028 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2031 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2032 Status Notification (bounce) messages are now MIME format per RFC 3464.
2033 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2034 under the control of the dsn_advertise_hosts option, and routers may
2035 have a dsn_lasthop option.
2037 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2038 default, modifiable by a malware= option. The list separator for
2039 the options can now be changed in the usual way. Bug 68.
2041 JH/10 The smtp_receive_timeout main option is now expanded before use.
2043 JH/11 The incoming_interface log option now also enables logging of the
2044 local interface on delivery outgoing connections.
2046 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2047 if the interface and destination host and port all match.
2049 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2052 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2053 Patch from Andrew Lewis.
2055 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2056 now supports optional time-restrictions, weighting, and priority
2057 modifiers per server. Patch originally by <rommer@active.by>.
2059 JH/16 The spamd_address main option now supports a mixed list of local
2060 and remote servers. Remote servers can be IPv6 addresses, and
2061 specify a port-range.
2063 JH/17 Bug 68: The spamd_address main option now supports an optional
2064 timeout value per server.
2066 JH/18 Bug 1581: Router and transport options headers_add/remove can
2067 now have the list separator specified.
2069 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2072 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2075 JH/21 Support for the A6 type of dns record is withdrawn.
2077 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2078 rather than the verbs used.
2080 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2081 from 255 to 1024 chars.
2083 JH/24 Verification callouts now attempt to use TLS by default.
2085 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2086 are generic router options now. The defaults didn't change.
2088 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2089 Original patch from Alexander Shikoff, worked over by JH.
2091 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2092 files if ZCAT_COMMAND is not executable.
2094 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2096 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2098 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2099 Normally benign, it bites when the pair was led to by a CNAME;
2100 modern usage is to not canonicalize the domain to a CNAME target
2101 (and we were inconsistent anyway for A-only vs AAAA+A).
2103 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2105 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2106 when evaluating $sender_host_dnssec.
2108 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2109 $sender_helo_dnssec variable.
2111 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2113 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2115 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2117 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2118 documented as working, but never had. Support all but $spam_report.
2120 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2121 added for tls authenticator.
2123 HS/03 Add perl_taintmode main config option
2129 TL/01 When running the test suite, the README says that variables such as
2130 no_msglog_check are global and can be placed anywhere in a specific
2131 test's script, however it was observed that placement needed to be near
2132 the beginning for it to behave that way. Changed the runtest perl
2133 script to read through the entire script once to detect and set these
2134 variables, reset to the beginning of the script, and then run through
2135 the script parsing/test process like normal.
2137 TL/02 The BSD's have an arc4random API. One of the functions to induce
2138 adding randomness was arc4random_stir(), but it has been removed in
2139 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2140 function when detected.
2142 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2143 cause callback expansion.
2145 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2146 syntax errors in an expansion can be treated as a string instead of
2147 logging or causing an error, due to the internal use of bool_lax
2148 instead of bool when processing it.
2150 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2151 server certificates when making smtp deliveries.
2153 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2155 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2157 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2159 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2160 Merged patch from Sebastian Wiedenroth.
2162 JH/05 Fix results-pipe from transport process. Several recipients, combined
2163 with certificate use, exposed issues where response data items split
2164 over buffer boundaries were not parsed properly. This eventually
2165 resulted in duplicates being sent. This issue only became common enough
2166 to notice due to the introduction of connection certificate information,
2167 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2169 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2170 size buffer was used, resulting in syntax errors when an expansion
2173 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2174 version 3.3.6 or later.
2176 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2177 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2178 both become "event_action", the variables become $event_name, $event_data
2179 and $event_defer_errno. There is a new variable $verify_mode, usable in
2180 routers, transports and related events. The tls:cert event is now also
2181 raised for inbound connections, if the main configuration event_action
2184 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2185 early OCSP support, but no stapling (appears to be less than 1.0.0).
2187 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2188 server certificate names available under the smtp transport option
2189 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2192 JH/10 Time-related extraction expansions from certificates now use the main
2193 option "timezone" setting for output formatting, and are consistent
2194 between OpenSSL and GnuTLS compilations. Bug 1541.
2196 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2197 encoded parameter in the incoming message. Bug 1558.
2199 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2200 include certificate info, eximon was claiming there were spoolfile
2203 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2205 JH/14 Log delivery-related information more consistently, using the sequence
2206 "H=<name> [<ip>]" wherever possible.
2208 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2209 are problematic for Debian distribution, omit them from the release
2212 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2214 JH/16 Fix string representation of time values on 64bit time_t architectures.
2217 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2218 output list separator was used.
2223 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2224 checkers that were complaining about end of non-void function with no
2227 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2228 This was a regression introduced in 4.83 by another bugfix.
2230 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2232 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2233 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2239 TF/01 Correctly close the server side of TLS when forking for delivery.
2241 When a message was received over SMTP with TLS, Exim failed to clear up
2242 the incoming connection properly after forking off the child process to
2243 deliver the message. In some situations the subsequent outgoing
2244 delivery connection happened to have the same fd number as the incoming
2245 connection previously had. Exim would try to use TLS and fail, logging
2246 a "Bad file descriptor" error.
2248 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2249 utilities have not been installed.
2251 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2252 temporary space as the ACL may create new global variables.
2254 TL/01 LDAP support uses per connection or global context settings, depending
2255 upon the detected version of the libraries at build time.
2257 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2258 to extract and use the src ip:port in logging and expansions as if it
2259 were a direct connection from the outside internet. PPv2 support was
2260 updated based on HAProxy spec change in May 2014.
2262 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2264 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2265 Properly escape header and check for NULL return.
2267 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2270 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2272 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2273 characters in header names, implemented as a verify condition.
2274 Contributed by Michael Fischer v. Mollard.
2276 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2277 results permerror and temperror. Previous values are deprecated but
2278 still accepted. In a future release, err_perm and err_temp will be
2279 completely removed, which will be a backward incompatibility if the
2280 ACL tests for either of these two old results. Patch contributed by
2281 user bes-internal on the mailing list.
2283 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2285 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2286 selectors, in both main and reject logs.
2288 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2291 JH/07 Add malware type "sock" for talking to simple daemon.
2293 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2295 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2296 routers/transports under cutthrough routing.
2298 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2299 numbers. Touch up "bool" conditional to keep the same definition.
2301 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2303 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2305 JH/12 Expand items in router/transport headers_add or headers_remove lists
2306 individually rather than the list as a whole. Bug 1452.
2308 Required for reasonable handling of multiple headers_ options when
2309 they may be empty; requires that headers_remove items with embedded
2310 colons must have them doubled (or the list-separator changed).
2312 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2313 view the policy declared in the DMARC record. Currently, $dmarc_status
2314 is a combined value of both the record presence and the result of the
2317 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2319 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2320 dnslookup router and the smtp transport (applying to the forward
2323 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2324 of ldap servers used for a specific lookup. Patch provided by Heiko
2327 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2328 New variable $lookup_dnssec_authenticated for observability.
2330 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2331 Patch submitted by Lars Timman.
2333 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2335 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2336 Requires trusted mode and valid format message id, aborts otherwise.
2337 Patch contributed by Heiko Schlichting.
2339 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2340 certextract with support for various fields. Bug 1358.
2342 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2343 is requested by default, modifiable by smtp transport option
2346 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2347 operate on certificate variables to give certificate fingerprints
2348 Also new ${sha256:cert_variable}.
2350 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2352 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2353 Christian Aistleitner.
2355 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2357 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2358 file. Patch from Wolfgang Breyha.
2360 JH/25 Expand the coverage of the delivery $host and $host_address to
2361 client authenticators run in verify callout. Bug 1476.
2363 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2364 align with daemon_smtp_ports. Bug 72.
2366 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2367 support and error reporting did not work properly.
2369 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2370 and is readable. Patch from Andrew Colin Kissa.
2372 TL/14 Enhance documentation of ${run expansion and how it parses the
2373 commandline after expansion, particularly in the case when an
2374 unquoted variable expansion results in an empty value.
2376 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2378 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2379 by renaming away from it. Addresses GH issue 15, reported by
2382 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2384 TL/15 SECURITY: prevent double expansion in math comparison functions
2385 (can expand unsanitized data). Not remotely exploitable.
2392 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2394 PP/02 Make -n do something, by making it not do something.
2395 When combined with -bP, the name of an option is not output.
2397 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2400 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2401 $sender_host_name and config options to manage this, and basic check
2404 PP/05 DSCP support for outbound connections and control modifier for inbound.
2406 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2407 (Only plugin which currently uses this is kerberos4, which nobody should
2408 be using, but we should make it available and other future plugins might
2409 conceivably use it, even though it would break NAT; stuff *should* be
2410 using channel bindings instead).
2412 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2413 name; added for Sendmail compatibility; requires admin caller.
2414 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2415 just ignore it); requires trusted caller.
2416 Also parse but ignore: -Ac -Am -X<logfile>
2419 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2421 TL/02 Add +smtp_confirmation as a default logging option.
2423 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2424 Patch by Magnus Holmgren from 2007-02-20.
2426 TL/04 Bugzilla 1281 - Spec typo.
2427 Bugzilla 1283 - Spec typo.
2428 Bugzilla 1290 - Spec grammar fixes.
2430 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2432 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2434 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2435 mailing list by by Dmitry Isaikin.
2437 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2439 JH/02 Support "G" suffix to numbers in ${if comparisons.
2441 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2443 NM/01 Bugzilla 1197 - Spec typo
2444 Bugzilla 1196 - Spec examples corrections
2446 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2448 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2449 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2452 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2453 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2455 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2456 "acl {{name}{arg}...}", and optional args on acl condition
2459 JH/05 Permit multiple router/transport headers_add/remove lines.
2461 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2463 JH/07 Avoid using a waiting database for a single-message-only transport.
2464 Performance patch from Paul Fisher. Bugzilla 1262.
2466 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2469 JH/09 Add $headers_added variable, with content from use of ACL modifier
2470 add_header (but not yet added to the message). Bugzilla 199.
2472 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2473 Pulled from Bugzilla 817 by Wolfgang Breyha.
2475 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2477 (nb: this is the same fix as in Exim 4.80.1)
2479 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2482 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2485 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2487 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2488 advertise SMTP AUTH mechanism to us, instead of a generic
2489 protocol violation error. Also, make Exim more robust to bad
2490 data from the Dovecot auth socket.
2492 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2494 When a queue runner is handling a message, Exim first routes the
2495 recipient addresses, during which it prunes them based on the retry
2496 hints database. After that it attempts to deliver the message to
2497 any remaining recipients. It then updates the hints database using
2500 So if a recipient address works intermittently, it can get repeatedly
2501 deferred at routing time. The retry hints record remains fresh so the
2502 address never reaches the final cutoff time.
2504 This is a fairly common occurrence when a user is bumping up against
2505 their storage quota. Exim had some logic in its local delivery code
2506 to deal with this. However it did not apply to per-recipient defers
2507 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2509 This change adds a proper retry rule check during routing so that the
2510 final cutoff time is checked against the message's age. We only do
2511 this check if there is an address retry record and there is not a
2512 domain retry record; this implies that previous attempts to handle
2513 the address had the retry_use_local_parts option turned on. We use
2514 this as an approximation for the destination being like a local
2515 delivery, as in LMTP.
2517 I suspect this new check makes the old local delivery cutoff check
2518 redundant, but I have not verified this so I left the code in place.
2520 TF/02 Correct gecos expansion when From: is a prefix of the username.
2522 Test 0254 submits a message to Exim with the header
2526 When I ran the test suite under the user fanf2, Exim expanded
2527 the header to contain my full name, whereas it should have added
2528 a Resent-Sender: header. It erroneously treats any prefix of the
2529 username as equal to the username.
2531 This change corrects that bug.
2533 GF/01 DCC debug and logging tidyup
2534 Error conditions log to paniclog rather than rejectlog.
2535 Debug lines prefixed by "DCC: " to remove any ambiguity.
2537 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2539 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2540 Bug spotted by Jeremy Harris; was flawed since initial commit.
2541 Would have resulted in OCSP responses post-SNI triggering an Exim
2542 NULL dereference and crash.
2544 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2546 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2547 Bug detection, analysis and fix by Samuel Thibault.
2548 Bugzilla 1331, Debian bug #698092.
2550 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2552 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2553 Server implementation by Todd Lyons, client by JH.
2554 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2555 config variable "prdr_enable" controls whether the server
2556 advertises the facility. If the client requests PRDR a new
2557 acl_data_smtp_prdr ACL is called once for each recipient, after
2558 the body content is received and before the acl_smtp_data ACL.
2559 The client is controlled by both of: a hosts_try_prdr option
2560 on the smtp transport, and the server advertisement.
2561 Default client logging of deliveries and rejections involving
2562 PRDR are flagged with the string "PRDR".
2564 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2565 fclose(). Diagnosis by Todd Lyons.
2567 PP/17 Update configure.default to handle IPv6 localhost better.
2568 Patch by Alain Williams (plus minor tweaks).
2571 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2572 This is now consistent with GnuTLS, and is now documented: the
2573 previous undocumented portable approach to treating the option as
2574 unset was to force an expansion failure. That still works, and
2575 an empty string is now equivalent.
2577 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2578 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2579 not performing validation itself.
2581 PP/20 Added force_command boolean option to pipe transport.
2582 Patch from Nick Koston, of cPanel Inc.
2584 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2587 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2589 PP/21 Fix eximon continuous updating with timestamped log-files.
2590 Broken in a format-string cleanup in 4.80, missed when I repaired the
2591 other false fix of the same issue.
2592 Report and fix from Heiko Schlichting.
2595 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2596 Report from Prashanth Katuri.
2598 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2599 It's SecureTransport, so affects any MacOS clients which use the
2600 system-integrated TLS libraries, including email clients.
2602 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2603 using a MIME ACL for non-SMTP local injection.
2604 Report and assistance in diagnosis by Warren Baker.
2606 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2608 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2610 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2611 last id that failed so it may be referenced in subsequent ACL's.
2613 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2616 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2617 ldap library initialization, allowing self-signed CA's to be
2618 used. Also properly sets require_cert option later in code by
2619 using NULL (global ldap config) instead of ldap handle (per
2620 session). Bug diagnosis and testing by alxgomz.
2622 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2623 the src/util/ subdirectory.
2625 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2626 renamed to Transport Post Delivery Action by Jeremy Harris, as
2629 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2630 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2631 redis_servers = needs to be configured which will be used by the redis
2632 lookup. Patch from Warren Baker, of The Packet Hub.
2634 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2636 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2637 hostname or reverse DNS when processing a host list. Used suggestions
2638 from multiple comments on this bug.
2640 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2642 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2643 Missed a few lines, added it to make the runtest require no keyboard
2646 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2647 contains upper case chars. Make router use caseful_local_part.
2649 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2650 support when GnuTLS has been built with p11-kit.
2656 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2658 This, or similar/improved, will also be change PP/11 of 4.82.
2664 PP/01 Handle short writes when writing local log-files.
2665 In practice, only affects FreeBSD (8 onwards).
2666 Bugzilla 1053, with thanks to Dmitry Isaikin.
2668 NM/01 Bugzilla 949 - Documentation tweak
2670 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2673 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2675 PP/02 Implemented gsasl authenticator.
2677 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2679 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2680 `pkg-config foo` for cflags/libs.
2682 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2683 with rest of GSASL and with heimdal_gssapi.
2685 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2686 `pkg-config foo` for cflags/libs for the TLS implementation.
2688 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2689 properties get this fed in as external SSF. A number of robustness
2690 and debugging improvements to the cyrus_sasl authenticator.
2692 PP/08 cyrus_sasl server now expands the server_realm option.
2694 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2695 Patch by Jeremy Harris.
2697 PP/10 Added dbmjz lookup type.
2699 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2701 PP/12 MAIL args handles TAB as well as SP, for better interop with
2702 non-compliant senders.
2703 Analysis and variant patch by Todd Lyons.
2705 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2706 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2707 Patch from Dirk Mueller <dmueller@suse.com>
2709 PP/13 tls_peerdn now print-escaped for spool files.
2710 Observed some $tls_peerdn in wild which contained \n, which resulted
2711 in spool file corruption.
2713 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2714 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2715 or write after TLS renegotiation, which otherwise led to messages
2718 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2719 as a tracking header (ie: a signed header comes before the signature).
2720 Patch from Wolfgang Breyha.
2722 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2723 comma-sep list; embedded commas doubled.
2725 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2727 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2729 Report and patch from Dmitry Banschikov.
2731 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2732 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2733 failures. We appear to now support TLS1.1+ with Exim.
2735 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2736 lets Exim select keys and certificates based upon TLS SNI from client.
2737 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2738 before an outbound SMTP session. New log_selector, +tls_sni.
2740 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2741 NULL dereference. Report and patch from Alun Jones.
2743 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2744 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2745 Not seeing resolver debug output on NetBSD, but suspect this is a
2746 resolver implementation change.
2748 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2749 Left warnings. Added "eximon gdb" invocation mode.
2751 PP/21 Defaulting "accept_8bitmime" to true, not false.
2753 PP/22 Added -bw for inetd wait mode support.
2755 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2756 locate the relevant includes and libraries. Made this the default.
2758 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2759 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2761 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2762 This may cause build issues on older platforms.
2764 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2765 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2766 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2767 Added SNI support via GnuTLS too.
2768 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2770 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2772 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2773 Applied second patch from Janne, implementing suggestion to default
2774 multiple-strings-in-record handling to match SPF spec.
2776 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2778 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2779 read-only, out of scope).
2780 Patch from Wolfgang Breyha, report from Stuart Northfield.
2782 PP/29 Fix three issues highlighted by clang analyser static analysis.
2783 Only crash-plausible issue would require the Cambridge-specific
2784 iplookup router and a misconfiguration.
2785 Report from Marcin Mirosław.
2787 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2789 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2790 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2791 As part of this, removing so much warning spew let me fix some minor
2792 real issues in debug logging.
2794 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2795 assignment on my part. Fixed.
2797 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2798 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2799 Janne Snabb (who went above and beyond: thank you).
2801 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2802 string otherwise requires a connection and a bunch more work and it's
2803 relatively easy to get wrong. Should also expose TLS library linkage
2806 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2807 64-bit ${eval} (JH/03).
2809 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2810 GNU libc to support some of the 64-bit stuff, should not lead to
2811 conflicts. Defined before os.h is pulled in, so if a given platform
2812 needs to override this, it can.
2814 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2815 protection layer was required, which is not implemented.
2816 Bugzilla 1254, patch from Wolfgang Breyha.
2818 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2819 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2820 tls_dhparam take prime identifiers. Also unbreak combination of
2821 OpenSSL+DH_params+TLSSNI.
2823 PP/39 Disable SSLv2 by default in OpenSSL support.
2829 PP/01 Solaris build fix for Oracle's LDAP libraries.
2830 Bugzilla 1109, patch from Stephen Usher.
2832 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2834 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2837 TF/02 Fix a couple more cases where we did not log the error message
2838 when unlink() failed. See also change 4.74-TF/03.
2840 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2841 lock up or crash if it happened to be inside a call to libc when it
2842 got a SIGUSR1 from exiwhat.
2844 The SIGUSR1 handler appends the current process status to the process
2845 log which is later printed by exiwhat. It used to use the general
2846 purpose logging code to do this, but several functions it calls are
2847 not safe for signals.
2849 The new output code in the SIGUSR1 handler is specific to the process
2850 log, and simple enough that it's easy to inspect for signal safety.
2851 Removing some special cases also simplifies the general logging code.
2852 Removing the spurious timestamps from the process log simplifies
2855 TF/04 Improved ratelimit ACL condition.
2857 The /noupdate option has been deprecated in favour of /readonly which
2858 has clearer semantics. The /leaky, /strict, and /readonly update modes
2859 are mutually exclusive. The update mode is no longer included in the
2860 database key; it just determines when the database is updated. (This
2861 means that when you upgrade Exim will forget old rate measurements.)
2863 Exim now checks that the per_* options are used with an update mode that
2864 makes sense for the current ACL. For example, when Exim is processing a
2865 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2866 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2867 must specify per_mail/readonly. If you omit the update mode it defaults to
2868 /leaky where that makes sense (as before) or /readonly where required.
2870 The /noupdate option is now undocumented but still supported for
2871 backwards compatibility. It is equivalent to /readonly except that in
2872 ACLs where /readonly is required you may specify /leaky/noupdate or
2873 /strict/noupdate which are treated the same as /readonly.
2875 A useful new feature is the /count= option. This is a generalization
2876 of the per_byte option, so that you can measure the throughput of other
2877 aggregate values. For example, the per_byte option is now equivalent
2878 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2880 The per_rcpt option has been generalized using the /count= mechanism
2881 (though it's more complicated than the per_byte equivalence). When it is
2882 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2883 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2884 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2885 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2886 Note that using per_rcpt with a non-readonly update mode in more than
2887 one ACL will cause the recipients to be double-counted. (The per_mail
2888 and per_byte options don't have this problem.)
2890 The handling of very low rates has changed slightly. If the computed rate
2891 is less than the event's count (usually one) then this event is the first
2892 after a long gap. In this case the rate is set to the same as this event's
2893 count, so that the first message of a spam run is counted properly.
2895 The major new feature is a mechanism for counting the rate of unique
2896 events. The new per_addr option counts the number of different
2897 recipients that someone has sent messages to in the last time period. It
2898 behaves like per_rcpt if all the recipient addresses are different, but
2899 duplicate recipient addresses do not increase the measured rate. Like
2900 the /count= option this is a general mechanism, so the per_addr option
2901 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2902 example, measure the rate that a client uses different sender addresses
2903 with the options per_mail/unique=$sender_address. There are further
2904 details in the main documentation.
2906 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2908 TF/06 Removed a few PCRE remnants.
2910 TF/07 Automatically extract Exim's version number from tags in the git
2911 repository when doing development or release builds.
2913 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2914 Bugzilla 879. Patch from Paul Fisher.
2916 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2917 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2920 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2922 PP/05 Variable $av_failed, true if the AV scanner deferred.
2923 Bugzilla 1078. Patch from John Horne.
2925 PP/06 Stop make process more reliably on build failure.
2926 Bugzilla 1087. Patch from Heiko Schlittermann.
2928 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2929 Bugzilla 1089. Patch from Heiko Schlittermann.
2931 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2932 Bugzilla 1131. Patch from Holger Weiß.
2934 PP/09 Handle IPv6 addresses with SPF.
2935 Bugzilla 860. Patch from Wolfgang Breyha.
2937 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2939 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2942 PP/11 match_* no longer expand right-hand-side by default.
2943 New compile-time build option, EXPAND_LISTMATCH_RHS.
2944 New expansion conditions, "inlist", "inlisti".
2946 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2948 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2950 PP/14 fix log_write() format string regression from TF/03.
2951 Bugzilla 1152. Patch from Dmitry Isaikin.
2957 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2959 PP/02 Harmonised TLS library version reporting; only show if debugging.
2960 Layout now matches that introduced for other libraries in 4.74 PP/03.
2962 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2964 PP/04 New "dns_use_edns0" global option.
2966 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2969 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2970 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2972 TK/01 Updated PolarSSL code to 0.14.2.
2973 Bugzilla 1097. Patch from Andreas Metzler.
2975 PP/07 Catch divide-by-zero in ${eval:...}.
2976 Fixes bugzilla 1102.
2978 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2981 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2982 format-string attack -- SECURITY: remote arbitrary code execution.
2984 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2985 time unintentionally subject to list matching rules, letting the header
2986 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2987 arbitrary string expansion). This allowed for information disclosure.
2989 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2990 INT_MIN/-1 -- value coerced to INT_MAX.
2996 NM/01 Workaround for PCRE version dependency in version reporting
2999 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3000 This fixes portability to compilers other than gcc, notably
3001 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3003 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3004 makefiles for portability to HP-UX and POSIX correctness.
3006 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3007 Also via indented variable definition in the Makefile.
3008 (Debugging by Oliver Heesakkers).
3010 PP/02 Restore caching of spamd results with expanded spamd_address.
3011 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3013 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3014 Improves build reliability. Fix from: Frank Elsner
3016 NM/02 Fix wide character breakage in the rfc2047 coding
3017 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3019 NM/03 Allow underscore in dnslist lookups
3020 Fixes bug 1026. Patch from Graeme Fowler
3022 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3023 Code patches from Adam Ciarcinski of NetBSD.
3025 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3028 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3029 is logged, to avoid truncation. Patch from John Horne.
3031 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3032 Patch from Jakob Hirsch.
3034 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3035 SQL string expansion failure details.
3036 Patch from Andrey Oktyabrski.
3038 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3039 Patch from Simon Arlott.
3041 PP/09 New lookups functionality failed to compile on old gcc which rejects
3042 extern declarations in function scope.
3043 Patch from Oliver Fleischmann
3045 PP/10 Use sig_atomic_t for flags set from signal handlers.
3046 Check getgroups() return and improve debugging.
3047 Fixed developed for diagnosis in bug 927 (which turned out to be
3050 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3051 Patch from Mark Zealey.
3053 PP/12 Bugzilla 1056: Improved spamd server selection.
3054 Patch from Mark Zealey.
3056 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3057 Based on patch from Heiko Schlittermann.
3059 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3060 Patch from Uwe Doering, sign-off by Michael Haardt.
3062 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3063 variable declaration deep within a block. Bug and patch from
3066 PP/15 lookups-Makefile IRIX compatibility coercion.
3068 PP/16 Make DISABLE_DKIM build knob functional.
3070 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3071 Patch by Simon Arlott
3073 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3074 variable argument macros. Our copy now differs from upstream.
3080 TF/01 Failure to get a lock on a hints database can have serious
3081 consequences so log it to the panic log.
3083 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3084 controlled using the smtp_confirmation log selector.
3086 TF/03 Include the error message when we fail to unlink a spool file.
3088 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3089 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3090 for maintaining out-of-tree patches for some time.
3092 PP/01 Bugzilla 139: Documentation and portability issues.
3093 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3094 Handle per-OS dynamic-module compilation flags.
3096 PP/02 Let /dev/null have normal permissions.
3097 The 4.73 fixes were a little too stringent and complained about the
3098 permissions on /dev/null. Exempt it from some checks.
3099 Reported by Andreas M. Kirchwitz.
3101 PP/03 Report version information for many libraries, including
3102 Exim version information for dynamically loaded libraries. Created
3103 version.h, now support a version extension string for distributors
3104 who patch heavily. Dynamic module ABI change.
3106 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3107 privilege escalation vulnerability whereby the Exim run-time user
3108 can cause root to append content of the attacker's choosing to
3111 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3114 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3115 If dropping privileges for untrusted macros, we disabled normal logging
3116 on the basis that it would fail; for the Exim run-time user, this is not
3117 the case, and it resulted in successful deliveries going unlogged.
3118 Fixed. Reported by Andreas Metzler.
3124 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3125 only prepend for the Resent-* case. Fixes regression introduced in
3126 Exim 4.70 by NM/22 for Bugzilla 607.
3128 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3129 increasing numbers of administrators be bitten by this.
3131 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3133 PP/03 Bugzilla 994: added openssl_options main configuration option.
3135 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3137 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3139 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3141 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3142 without a peer certificate, leading to a segfault because of an
3143 assumption that peers always have certificates. Be a little more
3144 paranoid. Problem reported by Martin Tscholak.
3146 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3147 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3148 NB: ClamAV planning to remove STREAM in "middle of 2010".
3149 CL also introduces -bmalware, various -d+acl logging additions and
3150 more caution in buffer sizes.
3152 PP/09 Implemented reverse_ip expansion operator.
3154 PP/10 Bugzilla 937: provide a "debug" ACL control.
3156 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3158 PP/12 Bugzilla 973: Implement --version.
3160 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3162 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3164 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3166 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3167 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3168 ignore trailing whitespace.
3170 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3172 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3175 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3176 Notification from Dr Andrew Aitchison.
3178 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3179 ExtendedDetectionInfo response format.
3180 Notification from John Horne.
3182 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3185 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3186 XSL and documented dependency on system catalogs, with examples of how
3189 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3192 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3193 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3194 configuration file which is writeable by the Exim user or group.
3196 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3197 of configuration files to cover files specified with the -C option if
3198 they are going to be used with root privileges, not just the default
3201 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3202 option (effectively making it always true).
3204 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3205 files to be used while preserving root privileges.
3207 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3208 that rogue child processes cannot use them.
3210 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3211 run-time user, instead of root.
3213 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3214 Exim run-time user without dropping privileges.
3216 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3217 result string, instead of calling string_vformat() twice with the same
3220 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3221 for other users. Others should always drop root privileges if they use
3222 -C on the command line, even for a whitelisted configure file.
3224 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3226 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3232 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3233 $data_path, and $header_path variables; fixed documentation bugs and
3236 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3237 exipick to access non-standard spools, including the "frozen" queue
3240 NM/01 Bugzilla 965: Support mysql stored procedures.
3241 Patch from Alain Williams
3243 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3245 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3246 Patch from Andreas Metzler
3248 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3249 Patch from Kirill Miazine
3251 NM/05 Bugzilla 671: Added umask to procmail example.
3253 JJ/03 installed exipick 20100323.0, fixing doc bug
3255 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3256 directory. Notification and patch from Dan Rosenberg.
3258 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3260 TK/02 Improve log output when DKIM signing operation fails.
3262 MH/01 Treat the transport option dkim_domain as a colon separated
3263 list, not as a single string, and sign the message with each element,
3264 omitting multiple occurences of the same signer.
3266 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3267 Bugzilla 985, 986. Patch by Simon Arlott
3269 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3270 Patch by Simon Arlott
3272 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3273 MBX locking. Notification from Dan Rosenberg.
3279 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3281 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3283 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3285 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3287 NM/04 Bugzilla 915: Flag broken perl installation during build.
3293 TK/01 Added patch by Johannes Berg that expands the main option
3294 "spamd_address" if it starts with a dollar sign.
3296 TK/02 Write list of recipients to X-Envelope-Sender header when building
3297 the mbox-format spool file for content scanning (suggested by Jakob
3300 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3301 (http://www.dcc-servers.net/) support via dccifd. Activated by
3302 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3304 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3305 by Mark Daniel Reidel <mr@df.eu>.
3307 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3308 When building exim an external PCRE library is now needed -
3309 PCRE is a system library on the majority of modern systems.
3310 See entry on PCRE_LIBS in EDITME file.
3312 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3313 conversation. Added nologin parameter to request.
3314 Patch contributed by Kirill Miazine.
3316 TF/01 Do not log submission mode rewrites if they do not change the address.
3318 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3320 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3321 log files in place. Contributed by Roberto Lima.
3323 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3325 TF/03 Bugzilla 615: When checking the local_parts router precondition
3326 after a local_part_suffix or local_part_prefix option, Exim now
3327 does not use the address's named list lookup cache, since this
3328 contains cached lookups for the whole local part.
3330 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3331 Robert Millan. Documentation is in experimental-spec.txt.
3333 TF/04 Bugzilla 668: Fix parallel build (make -j).
3335 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3337 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3338 Patch provided by Jan Srzednicki.
3340 TF/05 Leading white space used to be stripped from $spam_report which
3341 wrecked the formatting. Now it is preserved.
3343 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3344 that they are available at delivery time.
3346 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3348 TF/08 TLS error reporting now respects the incoming_interface and
3349 incoming_port log selectors.
3351 TF/09 Produce a more useful error message if an SMTP transport's hosts
3352 setting expands to an empty string.
3354 NM/06 Bugzilla 744: EXPN did not work under TLS.
3355 Patch provided by Phil Pennock.
3357 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3358 Patch provided by Richard Godbee.
3360 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3361 acl_smtp_notquit, added index entry.
3363 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3364 Patch provided by Eugene Bujak.
3366 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3367 accept(). Patch provided by Maxim Dounin.
3369 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3370 Patch provided by Phil Pennock.
3372 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3374 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3375 Patch provided by Brad "anomie" Jorsch.
3377 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3378 Patch provided by Dean Brooks.
3380 TK/05 Add native DKIM support (does not depend on external libraries).
3382 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3383 Patch provided by Graeme Fowler.
3385 NM/16 Bugzilla 851: Documentation example syntax fix.
3387 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3389 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3392 NM/19 Bugzilla 745: TLS version reporting.
3393 Patch provided by Phil Pennock.
3395 NM/20 Bugzilla 167: bool: condition support.
3396 Patch provided by Phil Pennock.
3398 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3399 clients. Patch provided by Phil Pennock.
3401 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3402 Patch provided by Brad "anomie" Jorsch.
3404 NM/23 Bugzilla 687: Fix misparses in eximstats.
3405 Patch provided by Heiko Schlittermann.
3407 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3408 Patch provided by Heiko Schlittermann.
3410 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3411 plus update to original patch.
3413 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3415 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3416 Patch provided by David Brownlee.
3418 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3420 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3422 NM/30 Bugzilla 888: TLS documentation bugfixes.
3424 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3426 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3427 Unlike the original bugzilla I have changed all shell scripts in src tree.
3429 NM/33 Bugzilla 898: Transport filter timeout fix.
3430 Patch by Todd Rinaldo.
3432 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3433 Patch by Serge Demonchaux.
3435 NM/35 Bugzilla 39: Base64 decode bug fixes.
3436 Patch by Jakob Hirsch.
3438 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3440 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3442 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3444 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3450 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3451 ALT-N's libdkim that I have put here:
3452 http://duncanthrax.net/exim-experimental/
3454 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3455 were called 'true' and it seems that C99 defines that as a reserved
3456 keyword to be used with 'bool' variable types. That means you could
3457 not include C99-style headers which use bools without triggering
3458 build errors in sieve.c.
3460 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3461 as mailq or other aliases. Changed the --help handling significantly
3462 to do whats expected. exim_usage() emits usage/help information.
3464 SC/01 Added the -bylocaldomain option to eximstats.
3466 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3468 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3470 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3476 PH/01 Another patch from the Sieve maintainer.
3478 PH/02 When an IPv6 address is converted to a string for single-key lookup
3479 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3480 dots are used instead of colons so that keys in lsearch files need not
3481 contain colons. This was done some time before quoting was made available
3482 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3483 (notated using the quote facility) so as to distinguish them from IPv4
3484 keys. This meant that lookups for IP addresses in host lists did not work
3485 for iplsearch lookups.
3487 This has been fixed by arranging for IPv6 addresses to be expressed with
3488 colons if the lookup type is iplsearch. This is not incompatible, because
3489 previously such lookups could never work.
3491 The situation is now rather anomalous, since one *can* have colons in
3492 ordinary lsearch keys. However, making the change in all cases is
3493 incompatible and would probably break a number of configurations.
3495 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3498 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3499 conversion specification without a maximum field width, thereby enabling
3500 a rogue spamd server to cause a buffer overflow. While nobody in their
3501 right mind would setup Exim to query an untrusted spamd server, an
3502 attacker that gains access to a server running spamd could potentially
3503 exploit this vulnerability to run arbitrary code as the Exim user.
3505 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3506 $primary_hostname instead of what libspf2 thinks the hosts name is.
3508 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3509 a directory entry by the name of the lookup key. Previously, if a
3510 symlink pointed to a non-existing file or a file in a directory that
3511 Exim lacked permissions to read, a lookup for a key matching that
3512 symlink would fail. Now it is enough that a matching directory entry
3513 exists, symlink or not. (Bugzilla 503.)
3515 PH/03 The body_linecount and body_zerocount variables are now exported in the
3518 PH/04 Added the $dnslist_matched variable.
3520 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3521 This means they are set thereafter only if the connection becomes
3524 PH/06 Added the client_condition to authenticators so that some can be skipped
3525 by clients under certain conditions.
3527 PH/07 The error message for a badly-placed control=no_multiline_responses left
3528 "_responses" off the end of the name.
3530 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3532 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3533 (without spaces) instead of just copying the configuration text.
3535 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3537 PH/11 Added $max_received_linelength.
3539 PH/12 Added +ignore_defer and +include_defer to host lists.
3541 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3542 way in which PCRE > 7.0 is built.
3544 PH/14 Implemented queue_only_load_latch.
3546 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3547 MAIL command. The effect was to mangle the value on 64-bit systems.
3549 PH/16 Another patch from the Sieve maintainer.
3551 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3553 PH/18 If a system quota error occurred while trying to create the file for
3554 a maildir delivery, the message "Mailbox is full" was not appended to the
3555 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3556 only to a quota excession during the actual writing of the file.
3558 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3559 characters?) which causes problems in log lines. The DN values are now
3560 passed through string_printing() before being added to log lines.
3562 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3563 and InterBase are left for another time.)
3565 PH/21 Added message_body_newlines option.
3567 PH/22 Guard against possible overflow in moan_check_errorcopy().
3569 PH/23 POSIX allows open() to be a macro; guard against that.
3571 PH/24 If the recipient of an error message contained an @ in the local part
3572 (suitably quoted, of course), incorrect values were put in $domain and
3573 $local_part during the evaluation of errors_copy.
3579 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3580 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3583 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3584 issue a MAIL command.
3586 PH/02 In an ACL statement such as
3588 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3590 if a client was not listed at all, or was listed with a value other than
3591 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3592 the condition was not true (as it should be), so access was not denied.
3593 The bug was that the ! inversion was incorrectly passed on to the second
3594 item. This has been fixed.
3596 PH/03 Added additional dnslists conditions == and =& which are different from
3597 = and & when the dns lookup returns more than one IP address.
3599 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3600 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3602 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3603 FSYNC, which compiles an option called disable_fsync that allows for
3604 bypassing fsync(). The documentation is heavily laced with warnings.
3606 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3608 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3609 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3610 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3611 including adding "make clean"; (3) Added -fPIC when compiling the test
3612 dynamically loaded module, to get rid of a warning.
3614 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3615 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3616 = 0s. The bug is otherwise harmless.
3618 PH/07 There was a bug in the dovecot authenticator such that the value of
3619 $auth1 could be overwritten, and so not correctly preserved, after a
3620 successful authentication. This usually meant that the value preserved by
3621 the server_setid option was incorrect.
3623 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3625 PH/09 Installed PCRE release 7.0.
3627 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3628 run for batched SMTP input. It is now run at the start of every message
3629 in the batch. While fixing this I discovered that the process information
3630 (output by running exiwhat) was not always getting set for -bs and -bS
3631 input. This is fixed, and it now also says "batched" for BSMTP.
3633 PH/11 Added control=no_pipelining.
3635 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3636 patch, slightly modified), and move the expansion of helo_data till after
3637 the connection is made in the smtp transport (so it can use these
3640 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3642 PH/14 Added log_selector = +pid.
3644 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3646 PH/16 Add ${if forany and ${if forall.
3648 PH/17 Added dsn_from option to vary the From: line in DSNs.
3650 PH/18 Flush SMTP output before performing a callout, unless control =
3651 no_callout_flush is set.
3653 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3654 was true (the default) a successful delivery failed to delete the retry
3655 item, thus causing premature timeout of the address. The bug is now
3658 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3660 PH/21 Long custom messages for fakedefer and fakereject are now split up
3661 into multiline responses in the same way that messages for "deny" and
3662 other ACL rejections are.
3664 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3665 with slight modification.
3667 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3668 draft, changing the syntax and factoring some duplicate code".
3670 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3671 for deliveries of the second and subsequent messages over the same SMTP
3674 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3675 ${reduce, with only minor "tidies".
3677 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3679 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3680 expansion side effects.
3682 PH/27 When a message times out after an over-quota error from an Exim-imposed
3683 quota, the bounce message says "mailbox is full". This message was not
3684 being given when it was a system quota that was exceeded. It now should
3687 MH/03 Made $recipients available in local_scan(). local_scan() already has
3688 better access to the recipient list through recipients_list[], but
3689 $recipients can be useful in postmaster-provided expansion strings.
3691 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3692 in the case of a MAIL command with additional options following the
3693 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3694 were accidentally chopped off.
3696 PH/29 SMTP synchronization checks are implemented when a command is read -
3697 there is a check that no more input is waiting when there shouldn't be
3698 any. However, for some commands, a delay in an ACL can mean that it is
3699 some time before the response is written. In this time, more input might
3700 arrive, invalidly. So now there are extra checks after an ACL has run for
3701 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3702 pipelining has not been advertised.
3704 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3706 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3707 returned in the SMTP response when smtp_return_error_details was false.
3708 This has been fixed.
3710 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3711 instead of the C I/O that was originally supplied, because problems were
3712 reported on Solaris.
3714 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3715 Exim which did not show up earlier: it was assuming that a call to
3716 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3717 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3718 was a macro that became an assignment, so it seemed to work. This has
3719 changed to a proper function call with a void return, hence the compile
3720 error. Exim's code has been fixed.
3722 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3725 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3727 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3729 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3730 because it turns out to be too big or there is a timeout) there is no
3731 "Completed" line in the log. When some messages of this type were
3732 selected by exigrep, they were listed as "not completed". Others were
3733 picked up by some special patterns. I have improved the selection
3734 criteria to be more general.
3736 PH/38 The host_find_failed option in the manualroute router can now be set
3737 to "ignore", to completely ignore a host whose IP address cannot be
3738 found. If all hosts are ignored, the behaviour is controlled by the new
3739 host_all_ignored option.
3741 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3742 homing or because of multiple MX records with /mx) generated more than
3743 one IP address, and the following item turned out to be the local host,
3744 all the secondary addresses of the first item were incorrectly removed
3745 from the list, along with the local host and any following hosts (which
3746 is what is supposed to happen).
3748 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3749 whoever called Exim into the -H file. In the case of the daemon it was
3750 behaving confusingly. When first started, it used values for whoever
3751 started the daemon, but after a SIGHUP it used the Exim user (because it
3752 calls itself on a restart). I have changed the code so that it now always
3755 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3756 message are rejected with the same error (e.g. no authentication or bad
3757 sender address), and a DATA command is nevertheless sent (as can happen
3758 with PIPELINING or a stupid MUA), the error message that was given to the
3759 RCPT commands is included in the rejection of the DATA command. This is
3760 intended to be helpful for MUAs that show only the final error to their
3763 PH/42 Another patch from the Sieve maintainer.
3765 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3766 Eximstats - Fixed some broken HTML links and added missing column headers
3768 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3769 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3771 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3773 PH/43 Yet another patch from the Sieve maintainer.
3775 PH/44 I found a way to check for a TCP/IP connection going away before sending
3776 the response to the final '.' that terminates a message, but only in the
3777 case where the client has not sent further data following the '.'
3778 (unfortunately, this is allowed). However, in many cases there won't be
3779 any further data because there won't be any more messages to send. A call
3780 to select() can be used: if it shows that the input is "ready", there is
3781 either input waiting, or the socket has been closed. An attempt to read
3782 the next input character can distinguish the two cases. Previously, Exim
3783 would have sent an OK response which the client would never have see.
3784 This could lead to message repetition. This fix should cure that, at
3785 least in a lot of common cases.
3787 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3788 advertised in response to EHLO.
3794 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3795 fixed by 4.65/MH/01 (is this a record?) are fixed:
3797 (i) An empty string was always treated as zero by the numeric comparison
3798 operators. This behaviour has been restored.
3800 (ii) It is documented that the numeric comparison operators always treat
3801 their arguments as decimal numbers. This was broken in that numbers
3802 starting with 0 were being interpreted as octal.
3804 While fixing these problems I realized that there was another issue that
3805 hadn't been noticed. Values of message_size_limit (both the global option
3806 and the transport option) were treated as octal if they started with 0.
3807 The documentation was vague. These values are now always treated as
3808 decimal, and I will make that clear in the documentation.
3814 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3815 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3818 MH/01 Don't check that the operands of numeric comparison operators are
3819 integers when their expansion is in "skipping" mode (fixes bug
3820 introduced by 4.64-PH/07).
3822 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3823 child addresses, Exim now panics and dies. Previously, because the count
3824 is held in a short int, deliveries were likely to be lost. As such a
3825 large number of recipients for a single message is ridiculous
3826 (performance will be very, very poor), I have chosen to impose a limit
3827 rather than extend the field.
3833 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3834 leftover -K file (the existence of which was triggered by #402).
3835 While we were at it, introduced process PID as part of the -K
3836 filename. This should rule out race conditions when creating
3839 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3840 processing considerably. Previous code took too long for large mails,
3841 triggering a timeout which in turn triggers #401.
3843 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3844 in the DK code in transports.c. sendfile() is not really portable,
3845 hence the _LINUX specificness.
3847 TF/01 In the add_headers option to the mail command in an Exim filter,
3848 there was a bug that Exim would claim a syntax error in any
3849 header after the first one which had an odd number of characters
3852 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3853 callout verification, Exim cached a "reject" for the entire domain. This
3854 is correct for most verifications, but it is not correct for a recipient
3855 verification with use_sender or use_postmaster set, because in that case
3856 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3857 case of MAIL FROM:<> rejection from other early rejections (e.g.
3858 rejection of HELO). When verifying a recipient using a non-null MAIL
3859 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3860 Whatever the result of the callout, the value of the domain cache is
3861 left unchanged (for any other kind of callout, getting as far as trying
3862 RCPT means that the domain itself is ok).
3864 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3867 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3868 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3869 session, the daemon ignores ECONNECT errors and logs others; it now
3870 ignores EPIPE as well.
3872 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3873 (quoted-printable decoding).
3875 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3876 later the small subsequent patch to fix an introduced bug.
3878 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3880 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3882 PH/08 An error is now given if message_size_limit is specified negative.
3884 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3885 to be given (somewhat) arbitrary names.
3887 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3890 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3891 miscellaneous code fixes
3893 PH/10 Added the log_reject_target ACL modifier to specify where to log
3896 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3897 hostname. This is wrong, because it relates to the incoming message (and
3898 probably the interface on which it is arriving) and not to the outgoing
3899 callout (which could be using a different interface). This has been
3900 changed to use the value of the helo_data option from the smtp transport
3901 instead - this is what is used when a message is actually being sent. If
3902 there is no remote transport (possible with a router that sets up host
3903 addresses), $smtp_active_hostname is used.
3905 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3906 tweaks were necessary in order to get it to work (see also 21 below):
3907 (a) The code assumed that strncpy() returns a negative number on buffer
3908 overflow, which isn't the case. Replaced with Exim's string_format()
3910 (b) There were several signed/unsigned issues. I just did the minimum
3911 hacking in of casts. There is scope for a larger refactoring.
3912 (c) The code used strcasecmp() which is not a standard C function.
3913 Replaced with Exim's strcmpic() function.
3914 (d) The code set only $1; it now sets $auth1 as well.
3915 (e) A simple test gave the error "authentication client didn't specify
3916 service in request". It would seem that Dovecot has changed its
3917 interface. Fortunately there's a specification; I followed it and
3918 changed what the client sends and it appears to be working now.
3920 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3923 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3924 address A is aliased to B and C, where B exists and C does not. Without
3925 -v the output is "A verified" because verification stops after a
3926 successful redirection if more than one address is generated. However,
3927 with -v the child addresses are also verified. Exim was outputting "A
3928 failed to verify" and then showing the successful verification for C,
3929 with its parentage. It now outputs "B failed to verify", showing B's
3930 parentage before showing the successful verification of C.
3932 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3933 look up a TXT record in a specific list after matching in a combined
3936 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3937 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3938 they consult the DNS. I had assumed they would set it the way they
3939 wanted; and indeed my experiments on Linux seem to show that in some
3940 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3941 To be on the safe side, however, I have now made the interface to
3942 host_find_byname() similar to host_find_bydns(), with an argument
3943 containing the DNS resolver options. The host_find_byname() function now
3944 sets these options at its start, just as host_find_bydns() does. The smtp
3945 transport options dns_qualify_single and dns_search_parents are passed to
3946 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3947 of host_find_byname() use the default settings of RES_DEFNAMES
3948 (qualify_single) but not RES_DNSRCH (search_parents).
3950 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3951 spool_read_header() do less string testing, by means of a preliminary
3952 switch on the second character of optional "-foo" lines. (This is
3953 overdue, caused by the large number of possibilities that now exist.
3954 Originally there were few.) While I was there, I also converted the
3955 str(n)cmp tests so they don't re-test the leading "-" and the first
3956 character, in the hope this might squeeze out yet more improvement.
3958 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3959 flag allowing group syntax was set by the header_syntax check but not
3960 turned off, possible causing trouble later; (2) The flag was not being
3961 set at all for the header_verify test, causing "group"-style headers to
3962 be rejected. I have now set it in this case, and also caused header_
3963 verify to ignore an empty address taken from a group. While doing this, I
3964 came across some other cases where the code for allowing group syntax
3965 while scanning a header line wasn't quite right (mostly, not resetting
3966 the flag correctly in the right place). These bugs could have caused
3967 trouble for malformed header lines. I hope it is now all correct.
3969 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3970 with the "reply" argument non-NULL. The code, however (which originally
3971 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3972 but it didn't always do it. This confused somebody who was copying the
3973 code for some other use. I have removed all the tests.
3975 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3976 feature that was used to support insecure browsers during the U.S. crypto
3977 embargo. It requires special client support, and Exim is probably the
3978 only MTA that supported it -- and would never use it because real RSA is
3979 always available. This code has been removed, because it had the bad
3980 effect of slowing Exim down by computing (never used) parameters for the
3981 RSA_EXPORT functionality.
3983 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3984 authenticator to fail if there's a tab character in the incoming data
3985 (there should never be unless someone is messing about, as it's supposed
3986 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3987 if the connection is using TLS or if the remote IP is the same as the
3988 local IP, and the "valid-client-cert option" if a client certificate has
3991 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3992 authenticators. This can be used for authorization after authentication
3993 succeeds. (In the case of plaintext, it servers for both authentication
3996 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3997 if any retry times were supplied.
3999 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4000 connection, where there is no client IP address to check. In this
4001 situation, the verify now always succeeds.
4003 PH/25 Applied John Jetmore's -Mset patch.
4005 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4007 PH/27 In a string expansion for a processed (not raw) header when multiple
4008 headers of the same name were present, leading whitespace was being
4009 removed from all of them, but trailing whitespace was being removed only
4010 from the last one. Now trailing whitespace is removed from each header
4011 before concatenation. Completely empty headers in a concatenation (as
4012 before) are ignored.
4014 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4015 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4017 PH/29 [Removed. This was a change that I later backed out, and forgot to
4018 correct the ChangeLog entry (that I had efficiently created) before
4019 committing the later change.]
4021 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4022 address errors (4xx response to RCPT) over the same connection as other
4023 messages routed to the same hosts. Such deliveries are always "forced",
4024 so retry times are not inspected. This resulted in far too many retries
4025 for the affected addresses. The effect occurred only when there were more
4026 hosts than the hosts_max_try setting in the smtp transport when it had
4027 the 4xx errors. Those hosts that it had tried were not added to the list
4028 of hosts for which the message was waiting, so if all were tried, there
4029 was no problem. Two fixes have been applied:
4031 (i) If there are any address or message errors in an SMTP delivery, none
4032 of the hosts (tried or untried) are now added to the list of hosts
4033 for which the message is waiting, so the message should not be a
4034 candidate for sending over the same connection that was used for a
4035 successful delivery of some other message. This seems entirely
4036 reasonable: after all the message is NOT "waiting for some host".
4037 This is so "obvious" that I'm not sure why it wasn't done
4038 previously. Hope I haven't missed anything, but it can't do any
4039 harm, as the worst effect is to miss an optimization.
4041 (ii) If, despite (i), such a delivery is accidentally attempted, the
4042 routing retry time is respected, so at least it doesn't keep
4043 hammering the server.
4045 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4046 in ${readsocket because some servers need this prod.
4048 PH/32 Added some extra debug output when updating a wait-xxx database.
4050 PH/33 The hint "could be header name not terminated by colon", which has been
4051 given for certain expansion errors for a long time, was not being given
4052 for the ${if def:h_colon_omitted{... case.
4054 PH/34 The spec says: "With one important exception, whenever a domain list is
4055 being scanned, $domain contains the subject domain." There was at least
4056 one case where this was not true.
4058 PH/35 The error "getsockname() failed: connection reset by peer" was being
4059 written to the panic log as well as the main log, but it isn't really
4060 panic-worthy as it just means the connection died rather early on. I have
4061 removed the panic log writing for the ECONNRESET error when getsockname()
4064 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4065 runs only) independently of the message's sender address. This meant
4066 that, if the 4xx error was in fact related to the sender, a different
4067 message to the same recipient with a different sender could confuse
4068 things. In particular, this can happen when sending to a greylisting
4069 server, but other circumstances could also provoke similar problems.
4070 I have changed the default so that the retry time for these errors is now
4071 based a combination of the sender and recipient addresses. This change
4072 can be overridden by setting address_retry_include_sender=false in the
4075 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4076 remote server are returned as part of bounce messages. This was not
4077 happening for LMTP over a pipe (the lmtp transport), but now it is the
4078 same for both kinds of LMTP.
4080 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4081 in header lines that were in fact CNAMEs. This is no longer the case.
4083 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4084 and queue runs started by the daemon processed all messages. This has
4085 been fixed so that -R and -S can now usefully be given with -q<time>.
4087 PH/40 Import PCRE release 6.7 (fixes some bugs).
4089 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4091 PH/42 Give an error if -q is specified more than once.
4093 PH/43 Renamed the variables $interface_address and $interface_port as
4094 $received_ip_address and $received_port, to make it clear that these
4095 values apply to message reception, and not to the outgoing interface when
4096 a message is delivered. (The old names remain recognized, of course.)
4098 PH/44 There was no timeout on the connect() call when using a Unix domain
4099 socket in the ${readsocket expansion. There now is.
4101 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4102 be meaningful with "accept".
4104 SC/01 Eximstats V1.43
4105 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4107 SC/02 Eximstats V1.44
4108 Use a glob alias rather than an array ref in the generated
4109 parser. This improves both readability and performance.
4111 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4112 Collect SpamAssassin and rejection statistics.
4113 Don't display local sender or destination tables unless
4114 there is data to show.
4115 Added average volumes into the top table text output.
4117 SC/04 Eximstats V1.46
4118 Collect data on the number of addresses (recipients)
4119 as well as the number of messages.
4121 SC/05 Eximstats V1.47
4122 Added 'Message too big' to the list of mail rejection
4123 reasons (thanks to Marco Gaiarin).
4125 SC/06 Eximstats V1.48
4126 Mainlog lines which have GMT offsets and are too short to
4127 have a flag are now skipped.
4129 SC/07 Eximstats V1.49 (Alain Williams)
4130 Added the -emptyok flag.
4132 SC/08 Eximstats V1.50
4133 Fixes for obtaining the IP address from reject messages.
4135 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4136 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4137 whitespace changes from 4.64-PH/27
4139 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4142 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4143 are found, allow negative numbers in numeric criteria)
4145 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4147 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4148 to match changes made in 4.64-PH/43
4150 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4152 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4153 "domain" is actually an IP address, and force a failure. This locks out
4154 those revolvers/nameservers that support "A-for-A" lookups, in
4155 contravention of the specifications.
4157 PH/48 When a host name was looked up from an IP address, and the subsequent
4158 forward lookup of the name timed out, the host name was left in
4159 $sender_host_name, contrary to the specification.
4161 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4162 restricted to single-key lookups, Exim was not diagnosing an error if
4163 * or *@ was used with a query-style lookup.
4165 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4167 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4168 long ago, but noone interested enough thought of it. Let's just say that
4169 the "1.1" means that there are some new functions that weren't there at
4170 some point in the past.
4172 PH/51 Error processing for expansion failure of helo_data from an smtp
4173 transport during callout processing was broken.
4175 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4176 tested/used via the -bh/-bhc/-bs options.
4178 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4179 bug, fixed in subsequent PCRE releases).
4181 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4182 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4184 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4190 SC/01 Use a glob alias rather than an array ref in eximstats generated
4191 parser. This improves both readability and performance.
4193 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4194 Don't display local sender or destination tables in eximstats unless
4195 there is data to show.
4196 Added average volumes into the eximstats top table text output.
4198 SC/03 Collect data on the number of addresses (recipients) as well
4199 as the number of messages in eximstats.
4201 TF/01 Correct an error in the documentation for the redirect router. Exim
4202 does (usually) call initgroups() when daemonizing.
4204 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4205 with consistent privilege compared to when running as a daemon.
4207 TF/03 Note in the spec that $authenticated_id is not set for local
4208 submissions from trusted users.
4210 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4211 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4213 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4214 by adding some example configuration directives to the default
4215 configuration file. A little bit of work is required to uncomment the
4216 directives and define how usernames and passwords are checked, but
4217 there is now a framework to start from.
4219 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4220 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4221 without this. I don't know how relevant this is to other LDAP libraries.
4223 PH/02 Add the verb name to the "unknown ACL verb" error.
4225 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4227 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4229 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4230 directory not expanded when it should be if an expanded home directory
4231 was set for the address (which is overridden by the transport).
4233 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4236 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4237 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4238 because it is too late at that time, and has no effect.
4240 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4241 security issue with \' (bugzilla #107). I could not use the
4242 PQescapeStringConn() function, because it needs a PGconn value as one of
4245 PH/08 When testing addresses using -bt, indicate those final addresses that
4246 are duplicates that would not cause an additional delivery. At least one
4247 person was confused, thinking that -bt output corresponded to deliveries.
4248 (Suppressing duplicates isn't a good idea as you lose the information
4249 about possibly different redirections that led to the duplicates.)
4251 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4252 systems where poll() doesn't work, in particular OS X.
4254 PH/10 Added more information to debugging output for retry time not reached.
4256 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4257 operations in malware.c.
4259 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4262 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4263 syslog_duplication set false, log lines that would normally be written
4264 both the the main log and to the reject log were not written to syslog at
4267 PH/14 In the default configuration, change the use of "message" in ACL warn
4268 statements to "add_header".
4270 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4271 not followed by a command (e.g. "seen endif").
4273 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4274 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4277 PH/17 Added extra conditions to the default value of delay_warning_condition
4281 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4282 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4283 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4286 The Auto-Submitted: and various List- headers are standardised, whereas I
4287 don't think Precedence: ever was.
4289 PH/18 Refactored debugging code in route_finduser() to show more information,
4290 in particular, the error code if getpwnam() issues one.
4292 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4293 This is apparently needed in addition to the PH/07 change above to avoid
4294 any possible encoding problems.
4296 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4297 but not after initializing Perl.
4299 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4300 output them only if debugging. By default they are written stderr,
4301 apparently, which is not desirable.
4303 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4306 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4309 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4311 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4312 authenticated or an ident call has been made. Suppress the default
4313 values for $authenticated_id and $authenticated_sender (but permit -oMai
4314 and -oMas) when testing with -bh.
4316 PH/24 Re-jigged the order of the tests in the default configuration so that the
4317 tests for valid domains and recipients precede the DNS black list and CSA
4318 tests, on the grounds that those ones are more expensive.
4320 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4321 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4322 This bug exists in every version of Exim that I still have, right back to
4325 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4326 However, an attempt to turn on case-sensitivity in a regex key by
4327 including (?-i) didn't work because the subject string was already
4328 lowercased, and the effects were non-intuitive. It turns out that a
4329 one-line patch can be used to allow (?-i) to work as expected.
4335 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4336 other effects) broke the use of negated acl sub-conditions.
4338 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4341 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4342 "Deny" causes Exim to reject the incoming connection with a 554 error.
4343 Unfortunately, if there is a major crisis, such as a disk failure,
4344 tcp-wrappers gives "deny", whereas what one would like would be some
4345 kind of temporary error. A kludge has been added to help with this.
4346 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4347 554 error is used if errno is still zero or contains ENOENT (which occurs
4348 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4351 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4353 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4354 errors. Otherwise a message that provokes a temporary error (when other
4355 messages do not) can cause a whole host to time out.
4357 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4358 addresses were routed directly to files or pipes from a redirect router.
4359 File deliveries just didn't batch; pipe deliveries might have suffered
4362 PH/06 A failure to get a lock for a hints database would erroneously always say
4363 "Failed to get write lock", even when it was really a read lock.
4365 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4366 of 0600. This has been changed to use the value of the lockfile_mode
4367 option (which defaults to 0600).
4369 PH/08 Applied small patch from the Sieve maintainer.
4371 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4372 folder from quota calculations, a direct delivery into this folder messed
4373 up the contents of the maildirsize file. This was because the regex was
4374 used only to exclude .Trash (or whatever) when the size of the mailbox
4375 was calculated. There was no check that a delivery was happening into an
4376 excluded directory. This bug has been fixed by ignoring all quota
4377 processing for deliveries into excluded directories.
4379 PH/10 Added the maildirfolder_create_regex option to appendfile.
4385 PH/01 The code for finding all the local interface addresses on a FreeBSD
4386 system running IPv6 was broken. This may well have applied to all BSD
4387 systems, as well as to others that have similar system calls. The broken
4388 code found IPv4 interfaces correctly, but gave incorrect values for the
4389 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4390 that it would not match correctly against @[] and not recognize the IPv6
4393 PH/02 The ipliteral router was not recognizing addresses of the form user@
4394 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4396 PH/03 Added disable_ipv6.
4398 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4399 decoded form, because it is most often used to construct To: headers
4400 lines in autoreplies, and the decoded form may well be syntactically
4401 invalid. However, $reply_address has leading white space removed, and all
4402 newlines turned into spaces so that the autoreply transport does not
4405 PH/05 If group was specified without a user on a router, and no group or user
4406 was specified on a transport, the group from the router was ignored.
4408 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4409 for visible compile-time settings that can be used to change these
4410 numbers, for those that want even more. Backwards compatibility with old
4411 spool files has been maintained. However, going back to a previous Exim
4412 release will lost any variables that are in spool files.
4414 PH/07 Two small changes when running in the test harness: increase delay when
4415 passing a TCP/IP connection to a new process, in case the original
4416 process has to generate a bounce, and remove special handling of
4417 127.0.0.2 (sic), which is no longer necessary.
4419 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4420 be the same on different OS.
4422 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4425 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4426 whether --show-vars was specified or not
4428 JJ/02 exipick: Added support for new ACL variable spool format introduced
4431 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4432 syntactically invalid From: or Reply-to: line, and a filter used this to
4433 generate an autoreply, and therefore failed to obtain an address for the
4434 autoreply, Exim could try to deliver to a non-existent relative file
4435 name, causing unrelated and misleading errors. What now happens is that
4436 it logs this as a hard delivery error, but does not attempt to create a
4439 PH/11 The exinext utility has a -C option for testing purposes, but although
4440 the given file was scanned by exinext itself; it wasn't being passed on
4441 when Exim was called.
4443 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4444 an end-of-file indication when reading a command response.
4446 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4447 compiled. In many other places in Exim, IPv6 addresses are always
4448 recognized, so I have changed this. It also means that IPv4 domain
4449 literals of the form [IPV4:n.n.n.n] are now always recognized.
4451 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4452 used if the router is not running as root, for example, when verifying at
4453 ACL time, or when using -bh. The debugging output from this situation was
4454 non-existent - all you got was a failure to exec. I have made two
4457 (a) Failures to set uid/gid, the current directory, or a process leader
4458 in a subprocess such as that created by queryprogram now generate
4459 suitable debugging output when -d is set.
4461 (b) The queryprogram router detects when it is not running as root,
4462 outputs suitable debugging information if -d is set, and then runs
4463 the subprocess without attempting to change uid/gid.
4465 PH/15 Minor change to Makefile for building test_host (undocumented testing
4468 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4469 additional section of a DNS packet that returns MX or SRV records.
4470 Instead, it always explicitly searches for A/AAAA records. This avoids
4471 major problems that occur when a DNS server includes only records of one
4472 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4473 fixed another bug: if SRV records were looked up and the corresponding
4474 address records were *not* found in the additional section, the port
4475 values from the SRV records were lost.
4477 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4478 using the correct key (the original address) when searching the retry
4479 rules in order to find which one to use for generating the retry hint.
4481 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4482 adding the default one. Similarly, if it contains a Reply-To: header, the
4483 errors_reply_to option, if set, is not used.
4485 PH/19 When calculating a retry time, Exim used to measure the "time since
4486 failure" by looking at the "first failed" field in the retry record. Now
4487 it does not use this if it is later than than the arrival time of the
4488 message. Instead it uses the arrival time. This makes for better
4489 behaviour in cases where some deliveries succeed, thus re-setting the
4490 "first failed" field. An example is a quota failure for a huge message
4491 when small messages continue to be delivered. Without this change, the
4492 "time since failure" will always be short, possible causing more frequent
4493 delivery attempts for the huge message than are intended.
4494 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4496 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4497 $1, $2, $3) because the numerical variables can be reset during some
4498 expansion items (e.g. "match"), thereby losing the authentication data.
4500 PH/21 Make -bV show the size of off_t variables so that the test suite can
4501 decide whether to run tests for quotas > 2G.
4503 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4504 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4505 filecount value is greater than 2G or if a quota value is greater than 2G
4506 on a system where the size of off_t is not greater than 4, a panic error
4509 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4510 never match. The debug and -bh output now contains an explicit error
4511 message indicating a malformed IPv4 address or mask.
4513 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4514 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4515 PH/23 above applies.
4517 PH/25 Do not write to syslog when running in the test harness. The only
4518 occasion when this arises is a failure to open the main or panic logs
4519 (for which there is an explicit test).
4521 PH/26 Added the /no_tell option to "control=freeze".
4523 PH/27 If a host name lookup failed very early in a connection, for example, if
4524 the IP address matched host_lookup and the reverse lookup yielded a name
4525 that did not have a forward lookup, an error message of the form "no IP
4526 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4527 could be logged. Now it outputs the IP address instead of "NULL".
4529 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4530 allows the sender and the authenticated sender to be set when
4531 submitting a message from within Exim. Since child_open_exim() is
4532 documented for local_scan(), the new function should be too.
4534 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4535 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4536 results in an empty string is now treated as unset.
4538 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4540 PH/31 Added sender_verify_fail logging option.
4542 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4543 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4544 tidied the source and removed it altogether.
4546 PH/33 When a queue run was abandoned because the load average was too high, a
4547 log line was always written; now it is written only if the queue_run log
4548 selector is set. In addition, the log line for abandonment now contains
4549 information about the queue run such as the pid. This is always present
4550 in "start" and "stop" lines but was omitted from the "abandon" line.
4552 PH/34 Omit spaces between a header name and the colon in the error message that
4553 is given when verify = headers_syntax fails (if there are lots of them,
4554 the message gets confusing).
4556 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4557 names, as there are now some PTR records that contain slashes. This check
4558 is only to protect against broken name servers that fall over on strange
4559 characters, so the fact that it applies to all lookups doesn't matter.
4561 PH/36 Now that the new test suite is complete, we can remove some of the
4562 special code in Exim that was needed for the old test suite. For example,
4563 sorting DNS records because real resolvers return them in an arbitrary
4564 order. The new test suite's fake resolver always returns records in the
4567 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4568 bounces) except when queue_only is set, to avoid logging races between
4569 the different processes.
4571 PH/38 Panic-die if .include specifies a non-absolute path.
4573 PH/39 A tweak to the "H" retry rule from its user.
4575 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4576 a label. They prevented compilation on older perls.
4578 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4579 a warning to be raised on newish perls.
4581 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4582 on queue. Changes to match documented behaviour of showing count of
4583 messages matching specified criteria.
4585 PH/40 Changed the default ident timeout from 30s to 5s.
4587 PH/41 Added support for the use of login_cap features, on those BSD systems
4588 that have them, for controlling the resources used by pipe deliveries.
4590 PH/42 The content-scanning code uses fopen() to create files in which to put
4591 message data. Previously it was not paying any attention to the mode of
4592 the files. Exim runs with umask(0) because the rest of the code creates
4593 files with open(), and sets the required mode explicitly. Thus, these
4594 files were ending up world-writeable. This was not a big issue, because,
4595 being within the spool directory, they were not world-accessible. I have
4596 created a function called modefopen, which takes an additional mode
4597 argument. It sets umask(777), creates the file, chmods it to the required
4598 mode, then resets the umask. All the relevant calls to fopen() in the
4599 content scanning code have been changed to use this function.
4601 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4602 to 24 hours. This avoids potential overflow problems when processing G
4603 and H retry rules. I suspect nobody ever tinkers with this value.
4605 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4607 PH/45 When the plaintext authenticator is running as a client, the server's
4608 challenges are checked to ensure they are valid base64 strings. By
4609 default, the authentication attempt is cancelled if an invalid string is
4610 received. Setting client_ignore_invalid_base64 true ignores these errors.
4611 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4612 they are received. Thus, the responses can be made to depend on the
4613 challenges. If an invalid string is ignored, an empty string is placed in
4616 PH/46 Messages that are created by the autoreply transport now contains a
4617 References: header, in accordance with RFCs 2822 and 3834.
4619 PH/47 Added authenticated_sender_force to the smtp transport.
4621 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4623 PH/49 Installed latest patch from the Sieve maintainer.
4625 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4626 was also set, the appendfile transport was unnecessarily scanning a
4627 directory of message files (e.g. for maildir delivery) to find the count
4628 of files (along with the size), even though it did not need this
4629 information. It now does the scan only if it needs to find either the
4630 size of the count of files.
4632 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4634 PH/52 Two bugs concerned with error handling when the smtp transport is
4637 (i) Exim was not creating retry information for temporary errors given
4638 for individual recipients after the DATA command when the smtp transport
4639 was used in LMTP mode. This meant that they could be retried too
4640 frequently, and not timed out correctly.
4642 (ii) Exim was setting the flag that allows error details to be returned
4643 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4644 recipients that were returned after the DATA command.
4646 PH/53 This is related to PH/52, but is more general: for any failing address,
4647 when detailed error information was permitted to be returned to the
4648 sender, but the error was temporary, then after the final timeout, only
4649 "retry timeout exceeded" was returned. Now it returns the full error as
4650 well as "retry timeout exceeded".
4652 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4653 do this, and (what is worse) MTAs that accept it.
4655 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4656 will now be deprecated.
4658 PH/56 New os.c-cygwin from the Cygwin maintainer.
4660 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4661 formats (previously only available in exim formats via -bpr, -bpru,
4662 and -bpra. Now also available in native and exiqgrep formats)
4664 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4665 with very large, slow to parse queues
4667 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4669 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4671 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4672 responses to authentication challenges, though it was showing the
4673 challenges; (ii) I've removed the CR characters from the debug output for
4676 PH/58 Allow for the insertion of a newline as well as a space when a string
4677 is turned into more than one encoded-word during RFC 2047 encoding. The
4678 Sieve code now uses this.
4680 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4681 data_4xx, lost_connection, tls_required.
4683 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4684 message was being sent as an SMTP response.
4686 PH/61 Add -l and -k options to exicyclog.
4688 PH/62 When verifying, if an address was redirected to one new address, so that
4689 verification continued, and the new address failed or deferred after
4690 having set something in $address_data, the value of $address_data was not
4691 passed back to the ACL. This was different to the case when no
4692 redirection occurred. The value is now passed back in both cases.
4694 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4695 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4696 use login_cap.h, so on its own it isn't the distinguishing feature. The
4697 new name refers directly to the setclassresources() function.
4699 PH/65 Added configuration files for NetBSD3.
4701 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4703 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4704 is preferred over IPv4.
4706 PH/68 The bounce_return_message and bounce_return_body options were not being
4707 honoured for bounces generated during the reception of non-SMTP messages.
4708 In particular, this applied to messages rejected by the ACL. This bug has
4709 been fixed. However, if bounce_return_message is true and bounce_return_
4710 body is false, the headers that are returned for a non-SMTP message
4711 include only those that have been read before the error was detected.
4712 (In the case of an ACL rejection, they have all been read.)
4714 PH/69 The HTML version of the specification is now built in a directory called
4715 spec_html instead of spec.html, because the latter looks like a path with
4716 a MIME-type, and this confuses some software.
4718 PH/70 Catch two compiler warnings in sieve.c.
4720 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4721 function verify_get_ident() calls ip_connect() to connect a socket, but
4722 if the "connect()" function timed out, ip_connect() used to close the
4723 socket. However, verify_get_ident() also closes the socket later, and in
4724 between Exim writes to the log, which may get opened at this point. When
4725 the socket was closed in ip_connect(), the log could get the same file
4726 descriptor number as the socket. This naturally causes chaos. The fix is
4727 not to close the socket in ip_connect(); the socket should be closed by
4728 the function that creates it. There was only one place in the code where
4729 this was missing, in the iplookup router, which I don't think anybody now
4730 uses, but I've fixed it anyway.
4732 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4733 well as to direct DNS lookups. Otherwise the handling of names in host
4734 lists is inconsistent and therefore confusing.
4740 PH/01 Two changes to the default runtime configuration:
4742 (1) Move the checks for relay_from_hosts and authenticated clients from
4743 after to before the (commented out) DNS black list checks.
4745 (2) Add control=submission to the relay_from_hosts and authenticated
4746 clients checks, on the grounds that messages accepted by these
4747 statements are most likely to be submissions.
4749 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4751 (1) Generate an error if the third argument for the ${prvs expansion is
4754 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4757 (3) Reset the variables that are obtained from the first argument of
4758 ${prvscheck and used in the second argument before leaving the code,
4759 because their memory is reclaimed, so using them afterwards may do
4762 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4763 one (it's much easier than Tom thought :-).
4765 (5) Because of (4), we can now allow for the use of $prvscheck_result
4766 inside the third argument.
4768 PH/03 For some reason, the default setting of PATH when running a command from
4769 a pipe transport was just "/usr/bin". I have changed it to
4772 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4773 anything to be listed in the output from -bV.
4775 PH/05 When a filter generated an autoreply, the entire To: header line was
4776 quoted in the delivery log line, like this:
4778 => >A.N.Other <ano@some.domain> <original@ddress> ...
4780 This has been changed so that it extracts the operative address. There
4781 may be more than one such address. If so, they are comma-separated, like
4784 => >ano@some.domain,ona@other.domain <original@ddress> ...
4786 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4787 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4788 not being looked up in the rDNS to get a host name, Exim was showing the
4789 IP address twice in Received: lines, even though the IP addresses were
4790 identical. For example:
4792 Received: from [1.2.3.4] (helo=[1.2.3.4])
4794 However, if the real host name was known, it was omitting the HELO data
4795 if it matched the actual IP address. This has been tidied up so that it
4796 doesn't show the same IP address twice.
4798 PH/07 When both +timestamp and +memory debugging was on, the value given by
4799 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4800 called by the debug printing, thereby overwriting the timestamp buffer.
4801 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4803 PH/08 When the original message was included in an autoreply transport, it
4804 always said "this is a copy of the message, including all the headers",
4805 even if body_only or headers_only was set. It now gives an appropriate
4808 PH/09 Applied a patch from the Sieve maintainer which:
4810 o fixes some comments
4811 o adds the (disabled) notify extension core
4812 o adds some debug output for the result of if/elsif tests
4813 o points to the current vacation draft in the documentation
4814 and documents the missing references header update
4818 o fixes a bug in processing the envelope test (when testing
4819 multiple envelope elements, the last element determined the
4822 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4823 Electronic Mail") by including:
4825 Auto-submitted: auto-generated
4827 in the messages that it generates (bounce messages and others, such as
4828 warnings). In the case of bounce messages for non-SMTP messages, there was
4829 also a typo: it was using "Auto_submitted" (underscore instead of
4830 hyphen). Since every message generated by Exim is necessarily in response
4831 to another message, thes have all been changed to:
4833 Auto-Submitted: auto-replied
4835 in accordance with these statements in the RFC:
4837 The auto-replied keyword:
4839 - SHOULD be used on messages sent in direct response to another
4840 message by an automatic process,
4842 - MUST NOT be used on manually-generated messages,
4844 - MAY be used on Delivery Status Notifications (DSNs) and Message
4845 Disposition Notifications (MDNs),
4847 - MUST NOT be used on messages generated by automatic or periodic
4848 processes, except for messages which are automatic responses to
4851 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4852 to the default Received: header definition.
4854 PH/12 Added log selector acl_warn_skipped (default on).
4856 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4857 variables because (a) they are in the wrong storage pool and (b) even if
4858 they were copied, it wouldn't work properly because of the caching.
4860 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4861 checking when decoding. Apparently there are clients that generate
4862 overlong encoded strings. Why am I not surprised?
4864 PH/15 If the first argument of "${if match_address" was not empty, but did not
4865 contain an "@" character, Exim crashed. Now it writes a panic log message
4866 and treats the condition as false.
4868 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4870 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4871 extension "envelope-auth". The code is finished and in agreement with
4872 other implementations, but there is no documentation so far and in fact,
4873 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4874 not changing the active code.
4876 Print executed "if" and "elsif" statements when debugging is used. This
4877 helps a great deal to understand what a filter does.
4879 Document more things not specified clearly in RFC3028. I had all this
4880 sorted out, when out of a sudden new issues came to my mind. Oops."
4882 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4885 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4886 canonical form (as documented). However, after a host name lookup from
4887 the IP address, check_host() was doing a simple string comparison with
4888 addresses acquired from the DNS when checking that the found name did
4889 have the original IP as one of its addresses. Since any found IPv6
4890 addresses are likely to be in abbreviated form, the comparison could
4891 fail. Luckily, there already exists a function for doing the comparison
4892 by converting both addresses to binary, so now that is used instead of
4893 the text comparison.
4895 PH/20 There was another similar case to PH/19, when a complete host name was
4896 given in a host list; looking up its IP address could give an abbreviated
4897 form, whereas the current host's name might or might not be abbreviated.
4898 The same fix has been applied.
4904 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4905 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4908 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4909 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4911 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4913 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4914 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4915 Also, for "Auto-Submitted", treat anything other than "no" as
4916 non-personal, in accordance with RFC 3834. (Previously it treated
4917 anything starting "auto-" as non-personal.)
4919 TF/01 The control=submission/name=... option had a problem with syntax
4920 errors if the name included a slash character. The /name= option
4921 now slurps the rest of the string, so it can include any characters
4922 but it must come last in the list of options (after /sender_retain
4925 PH/05 Some modifications to the interface to the fake nameserver for the new
4933 TK/01 Added the "success_on_redirect" address verification option. See
4934 NewStuff for rationale and an example.
4936 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4938 PH/02 Patch to exigrep to allow it to work on syslog lines.
4940 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4941 fread() to skip over the body file's header line, because in Cygwin the
4942 header line is locked and is inaccessible.
4944 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4945 co-exist for some time) to make it clear that it is the Exim ID that is
4946 referenced, not the Message-ID: header line.
4948 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4949 string_format() function, because snprintf() does not exist on all
4952 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4953 ${stat: expansion item.
4955 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4956 protocol synchronization error", to keep the pedants happy.
4958 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4959 well as for IRIX systems, when gcc is being used. See the host.c source
4962 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4964 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4967 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4968 transport and to the smtp transport in LMTP mode.
4970 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4972 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4973 run a filter in a subprocess. This could lead to confusion in subsequent
4974 lookups in the parent process. There should also be a search_tidyup() at
4975 the end of the subprocess.
4977 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4978 only if the host matched helo_try_verify_hosts, which caused the
4979 verification to occur when the EHLO/HELO command was issued. The ACL just
4980 tested the remembered result. Now, if a previous verification attempt has
4981 not happened, "verify = helo" does it there and then.
4983 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4985 TK/03 Fix log output including CR from clamd.
4987 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4988 exist provoked a memory error which could cause a segfault.
4990 PH/15 Installed PCRE 6.2
4992 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4994 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4995 of the problem. Specifically, suggested +O2 rather than +O1 for the
4998 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5000 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5001 record, the port was not correctly logged when the outgoing_port log
5002 selector was set (it logged the transort's default port).
5004 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5005 fallback_hosts, and "hosts" in the smtp transport.
5007 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5008 host errors such as "Connection refused".
5010 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5011 authentication with radiusclient 0.4.9:
5013 - Error returned from rc_read_config was caught wrongly
5014 - Username/password not passed on to radius server due to wrong length.
5016 The presumption is that some radiusclient API changes for 4.51/PH/17
5017 were not taken care of correctly. The code is still untested by me (my
5018 Linux distribution still has 0.3.2 of radiusclient), but it was
5019 contributed by a Radius user.
5021 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5022 expanding the "port" option of the smtp transport.
5024 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5025 while reading a MIME header. Thanks to Tom Hughes for a patch.
5027 PH/24 Include config.h inside local_scan.h so that configuration settings are
5030 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5031 that in an ACL for RCPT (for example), you can examine exactly what was
5034 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5035 commands, but it was not correctly comparing the address with the actual
5036 client host address. Thus, it would show the EHLO address in Received:
5037 header lines when this was not necessary.
5039 PH/27 Added the % operator to ${eval:}.
5041 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5042 it should be ignoring failures (because with -C, for example, it has lost
5043 privilege). It wasn't ignoring creation failures other than "already
5046 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5049 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5050 because an input line was too long, either on its own, or by virtue of
5051 too many continuations, the temporary file was not being removed, and the
5052 return code was incorrect.
5054 PH/31 Missing "BOOL" in function definition in filtertest.c.
5056 PH/32 Applied Sieve patches from the maintainer.
5058 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5060 PH/33 Added "verify = not_blind".
5062 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5063 Local/Makefile (with some defaults set). These are used in built scripts
5064 such as exicyclog, but they have never been used in the exim_install
5065 script (though there are many overriding facilities there). I have
5066 arranged that the exim_install script now takes note of these two
5069 PH/35 Installed configuration files for Dragonfly.
5071 PH/36 When a locally submitted message by a trusted user did not contain a
5072 From: header, and the sender address was obtained from -f or from an SMTP
5073 MAIL command, and the trusted user did not use -F to supply a sender
5074 name, $originator_name was incorrectly used when constructing a From:
5075 header. Furthermore, $originator_name was used for submission mode
5076 messages from external hosts without From: headers in a similar way,
5077 which is clearly wrong.
5079 PH/37 Added control=suppress_local_fixups.
5081 PH/38 When log_selector = +received_sender was set, and the addition of the
5082 sender made the log line's construction buffer exactly full, or one byte
5083 less than full, an overflow happened when the terminating "\n" was
5086 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5087 when the result of a list match is failure because a DNS lookup failed.
5089 PH/40 RM_COMMAND is now used in the building process.
5091 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5092 the "build-* directories that it finds.
5094 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5095 address in a domain literal was a prefix of an interface address.
5097 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5098 when verifying a sender address, unless rewrite_headers is false.
5100 PH/44 Wrote a long comment about why errors_to addresses are verified as
5101 recipients, not senders.
5103 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5104 the ratelimit ACL was added.
5106 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5108 PH/46 Added extra information about PostgreSQL errors to the error string.
5110 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5111 avoiding the need to install special zones in a real server. This is
5112 backwards compatible; if it can't find the fake resolver, it drops back.
5113 Thus, both old and new test suites can be run.
5115 TF/02 Added util/ratelimit.pl
5117 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5118 clock is set back in time.
5120 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5121 Candler <B.Candler@pobox.com>.
5123 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5124 OK for addresses that are the result of redirections.
5126 PH/48 A number of further additions for the benefit of the new test suite,
5127 including a fake gethostbyname() that interfaces to the fake DNS resolver
5130 TF/06 The fix for widen_domains has also been applied to qualify_single and
5131 search_parents which are the other dnslookup options that can cause
5134 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5137 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5139 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5140 service" if it encountered an MX record with an empty target hostname.
5141 The message is now "an MX or SRV record indicated no SMTP service".
5143 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5144 if the DNS of the sending site is misconfigured. This is quite a
5145 common situation. This change restores the behaviour of treating a
5146 helo verification defer as a failure.
5148 PH/51 If self=fail was set on a router, the bounce message did not include the
5149 actual error message.
5155 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5157 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5158 command itself ended in error, the underlying message about the transport
5159 filter timeout was being overwritten with the pipe command error. Now the
5160 underlying error message should be appended to the second error message.
5162 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5164 PH/02 Reduce the amount of output that "make" produces by default. Full output
5165 can still be requested.
5167 PH/03 The warning log line about a condition test deferring for a "warn" verb
5168 was being output only once per connection, rather than after each
5169 occurrence (because it was using the same function as for successful
5170 "warn" verbs). This seems wrong, so I have changed it.
5172 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5173 it should not have, which might have caused a crash in the right
5174 circumstances, but probably never did.
5176 PH/04 Installed a modified version of Tony Finch's patch to make submission
5177 mode fix the return path as well as the Sender: header line, and to
5178 add a /name= option so that you can make the user's friendly name appear
5181 TF/03 Added the control = fakedefer ACL modifier.
5183 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5184 Mark Lowes for thorough testing.
5186 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5188 TK/03 Merged latest SRS patch from Miles Wilton.
5190 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5191 with the definition in sysexits.h (which is #included earlier).
5192 Fortunately, Exim does not actually use EX_OK. The code used to try to
5193 preserve the sysexits.h value, by assuming that macro definitions were
5194 scanned for macro replacements. I have been disabused of this notion,
5195 so now the code just undefines EX_OK before #including unistd.h.
5197 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5198 in the smtp transport. When a block could not be written in a single
5199 write() function, the timeout was being re-applied to each part-write.
5200 This seems wrong - if the receiver was accepting one byte at a time it
5201 would take for ever. The timeout is now adjusted when this happens. It
5202 doesn't have to be particularly precise.
5204 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5205 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5207 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5208 without a domain if the check to <postmaster@domain> fails.
5210 SC/01 Eximstats: added -xls and the ability to specify output files
5211 (patch written by Frank Heydlauf).
5213 SC/02 Eximstats: use FileHandles for outputting results.
5215 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5217 SC/04 Eximstats: fixed display of large numbers with -nvr option
5219 SC/05 Eximstats: fixed merging of reports with empty tables.
5221 SC/06 Eximstats: added the -include_original_destination flag
5223 SC/07 Eximstats: removed tabs and trailing whitespace.
5225 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5227 TK/06 MBOX spool code: Add real "From " MBOX separator line
5228 so the .eml file is really in mbox format (even though
5229 most programs do not really care). Patch from Alex Miller.
5231 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5232 The latter is generated from $received_to and is only set if the
5233 message has one envelope recipient. SA can use these headers,
5234 obviously out-of-the-box. Patch from Alex Miller.
5236 PH/08 The ${def test on a variable was returning false if the variable's
5237 value was "0", contrary to what the specification has always said!
5238 The result should be true unless the variable is empty.
5240 PH/09 The syntax error of a character other than { following "${if
5241 def:variable_name" (after optional whitespace) was not being diagnosed.
5242 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5243 accidental colon was present, for example, could give incorrect results.
5245 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5246 result is used (not including appendfile, where other changes are about
5249 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5250 This involved changing a lot of size variables from int to off_t. It
5251 should work with maildirs and everything.
5253 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5254 spamd dying while we are connected to it.
5256 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5259 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5260 function for BDB 4.3.
5262 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5264 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5265 the sources for PCRE have been re-arranged and more files are now
5268 PH/15 The code I had for printing potentially long long variables in PH/11
5269 above was not the best (it lost precision). The length of off_t variables
5270 is now inspected at build time, and an appropriate printing format (%ld
5271 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5272 to be "long long int" or "long int". This is needed for the internal
5273 formatting function string_vformat().
5275 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5276 the configuration file to be ":syslog", then the script "guesses" where
5277 the logs files are, rather than using the compiled in default. In our
5278 case the guess is not the same as the compiled default, so the script
5279 suddenly stopped working when I started to use syslog. The patch checks
5280 to see if log_file_path is "". If so, it attempts to read it from exim
5281 with no configuration file to get the compiled in version, before it
5282 falls back to the previous guessing code."
5284 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5285 implementing BATV in an Exim configuration. See NewStuff for the gory
5288 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5289 Makefile that are specific to HP-UX.
5291 PH/18 If the "use_postmaster" option was set for a recipient callout together
5292 with the "random" option, the postmaster address was used as the MAIL
5293 FROM address for the random test, but not for the subsequent recipient
5294 test. It is now used for both.
5296 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5297 patch removes a few documentation additions to RFC 3028, because the
5298 latest draft now contains them. It adds the new en;ascii-case comparator
5299 and a new error check for 8bit text in MIME parts. Comparator and
5300 require names are now matched exactly. I enabled the subaddress
5301 extension, but it is not well tested yet (read: it works for me)."
5303 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5304 rework some of the code of TK/09 above to avoid the hardwired use of
5305 "%lld" and "long long". Replaced the call to snprintf() with a call to
5308 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5309 records point to non-existent hosts", "retry timeout exceeded", and
5310 "retry time not reached for any host after a long failure period".
5312 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5313 experimental DomainKeys support:
5315 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5316 (2) On an error such as an illegally used "control", the wrong name for
5317 the control was given.
5319 These problems did NOT occur unless DomainKeys support was compiled.
5321 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5323 PH/24 Added ${if match_ip condition.
5325 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5326 databases so that it will be absolutely obvious if a crash occurs in the
5327 DB library. This is a regular occurrence (often caused by mis-matched
5330 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5331 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5332 picked up on a user's system that detects such things. There doesn't seem
5333 to be a gcc warning option for this - only an attribute that has to be
5334 put on the function's prototype. It seems that in Fedora Core 4 they have
5335 set this on a number of new functions. No doubt there will be more in due
5338 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5339 specify a transport. However, if an address that was verified by such a
5340 router was the subject of a callout, Exim crashed because it tried to
5341 read the rcpt_include_affixes from the non-existent transport. Now it
5342 just assumes that the setting of that option is false. This bug was
5343 introduced by 4.51/PH/31.
5345 PH/28 Changed -d+all to exclude +memory, because that information is very
5346 rarely of interest, but it makes the output a lot bigger. People tend to
5347 do -d+all out of habit.
5349 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5350 code in os-type was giving problems when libc.so lives in lib64, like on
5353 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5354 aren't the modern standard, and it seems that some systems' include files
5355 don't always have them. Exim was already checking for some of the newer
5356 ones like T_AAAA, and defining it itself. I've added checks for all the
5357 record types that Exim uses.
5359 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5360 not automatically generating a new one, as it is supposed to. This
5361 prevented TLS from working. If the file did exist, but contained invalid
5362 data, a new version was generated, as expected. It was only the case of a
5363 non-existent file that was broken.
5365 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5366 with a change in libdomainkeys > 0.64.
5368 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5369 from DNS. If the selector record carries the flag, it now has
5370 precedence over the domain-wide flag.
5372 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5374 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5375 the use of a port name that isn't defined in /etc/services) occurred, the
5376 message was deferred as in a normal delivery, and thus remained on the
5377 spool, instead of being failed because of the mua_wrapper setting. This
5378 is now fixed, and I tidied up some of the mua_wrapper messages at the
5381 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5382 the messages in a hash of arrays rather than using individual hashes.
5383 This is a bit cleaner and results in dramatic memory savings, albeit
5384 at a slight CPU cost.
5386 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5387 as requested by Marc Sherman.
5389 SC/10 Eximstats: added histograms for user specified patterns as requested
5392 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5394 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5395 fopen() in the content-scanning modules that did not already have it.
5401 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5402 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5404 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5406 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5408 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5409 to test Sieve filters that use "vacation".
5411 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5412 that changes the way the GnuTLS parameters are stored in the cache file.
5413 The new format can be generated externally. For backward compatibility,
5414 if the data in the cache doesn't make sense, Exim assumes it has read an
5415 old-format file, and it generates new data and writes a new file. This
5416 means that you can't go back to an older release without removing the
5419 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5420 work if there are any delivery delays because "one_time" forces the
5421 parent to be marked "delivered", so its unseen clone is never tried
5422 again. For this reason, Exim now forbids the simultaneous setting of
5425 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5426 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5427 entry if you want to know the details. The fix, however, neglected to
5428 consider the case when local delivery batching is involved. The test for
5429 "previously delivered" was not happening when checking to see if an
5430 address could be batched with a previous (undelivered) one; under
5431 certain circumstances this could lead to multiple deliveries to the same
5434 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5435 in its include files, and this causes problems building Exim.
5437 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5438 header_syntax) but Exim was just ignoring anything given after a slash.
5439 In particular, this caused confusion with an attempt to use "verify =
5440 reverse_host_lookup/defer_ok". An error is now given when options are
5441 supplied for verify items that do not have them. (Maybe reverse_host_
5442 lookup should have a defer_ok option, but that's a different point.)
5444 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5445 defined by RFC 821) to 2048, because there were problems with some AUTH
5446 commands, and RFC 1869 says the size should be increased for extended
5447 SMTP commands that take arguments.
5449 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5452 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5453 "unknown" error; now it says that the functionality isn't in the binary.
5455 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5456 an address' error message when a string expansion fails (syntax or
5457 whatever). Otherwise the password may appear in the log. Following change
5458 PH/42 below, there is no longer a chance of it appearing in a bounce
5461 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5463 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5464 of its addresses was ever tried. (Bugzilla bug #2.)
5466 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5467 the result incorrectly in the debug output. (It correctly added a newline
5468 to what was transported.)
5470 TF/01 Added $received_time.
5472 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5473 commented out examples of how to interface to a virus scanner and to
5474 SpamAssassin. Also added commented examples of av_scanner and
5475 spamd_address settings.
5477 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5478 and controls are allowed in which ACLs. There were a couple of minor
5479 errors. Some of the entries in the conditions table (which is a table of
5480 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5481 negation of where the condition IS allowed.
5483 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5485 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5486 header file does not have a version number, so I've had to invent a new
5487 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5488 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5489 radiusclient), but it was contributed by a Radius user.
5491 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5492 files or directories, for OpenSSL.
5494 PH/19 When an Exim process that is running as root has to create an Exim log
5495 file, it does so in a subprocess that runs as exim:exim so as to get the
5496 ownership right at creation (otherwise, other Exim processes might see
5497 the file with the wrong ownership). There was no test for failure of this
5498 fork() call, which would lead to the process getting stuck as it waited
5499 for a non-existent subprocess. Forks do occasionally fail when resources
5500 run out. I reviewed all the other calls to fork(); they all seem to check
5503 PH/20 When checking for unexpected SMTP input at connect time (before writing
5504 the banner), Exim was not dealing correctly with a non-positive return
5505 from the read() function. If the client had disconnected by this time,
5506 the result was a log entry for a synchronization error with an empty
5507 string after "input=" when read() returned zero. If read() returned -1
5508 (an event I could not check), uninitialized data bytes were printed.
5509 There were reports of junk text (parts of files, etc) appearing after
5512 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5514 PH/22 Added support for macro redefinition, and (re)definition in between
5515 driver and ACL definitions.
5517 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5518 forgetting to use the resulting value; it was using the unexpanded value.
5520 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5521 hadn't been configured. The fix is from Juergen Kreileder, who
5522 understands it better than I do:
5524 "Here's what I see happening with three configured cyrus_sasl
5525 authenticators configured (plain, login, cram-md5):
5527 On startup auth_cyrus_sasl_init() gets called for each of these.
5528 This means three calls to sasl_listmech() without a specified mech_list.
5529 => SASL tests which mechs of all available mechs actually work
5530 => three warnings about OTP not working
5531 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5533 With the patch, sasl_listmech() also gets called three times. But now
5534 SASL's mech_list option is set to the server_mech specified in the the
5535 authenticator. Or in other words, the answer from sasl_listmech()
5536 gets limited to just the mech you're testing for (which is different
5538 => the return list contains just 'plain' or 'login', 'cram-md5' or
5539 nothing depending on the value of ob->server_mech.
5541 I've just tested the patch: Authentication still works fine,
5542 unavailable mechs specified in the exim configuration are still
5543 caught, and the auth.log warnings about OTP are gone."
5545 PH/25 When debugging is enabled, the contents of the command line are added
5546 to the debugging output, even when log_selector=+arguments is not
5549 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5550 answer is "GNU", and only if the return is "GNU/something" is the answer
5553 PH/27 $acl_verify_message is now set immediately after the failure of a
5554 verification in an ACL, and so is available in subsequent modifiers. In
5555 particular, the message can be preserved by coding like this:
5557 warn !verify = sender
5558 set acl_m0 = $acl_verify_message
5560 Previously, $acl_verify_message was set only while expanding "message"
5561 and "log_message" when a very denied access.
5563 PH/28 Modified OS/os.c-Linux with
5565 -#ifndef OS_LOAD_AVERAGE
5566 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5568 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5569 nomenclature these days.)
5571 PH/29 Installed patch from the Sieve maintainer that adds the options
5572 sieve_useraddress and sieve_subaddress to the redirect router.
5574 PH/30 In these circumstances:
5575 . Two addresses routed to the same list of hosts;
5576 . First host does not offer TLS;
5577 . First host accepts first address;
5578 . First host gives temporary error to second address;
5579 . Second host offers TLS and a TLS session is established;
5580 . Second host accepts second address.
5581 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5582 and peerdn, if requested) that were in fact used only for the second
5585 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5586 attention to any local part prefix or suffix that was matched by the
5587 router that accepted the address. It now behaves in the same way as it
5588 does for delivery: the affixes are removed from the local part unless
5589 rcpt_include_affixes is set on the transport.
5591 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5592 timeout during the DATA phase of an incoming message.
5594 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5595 applied a patch sanctioned by the Sieve maintainer.
5597 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5598 the uid or gid is negative. A case of a negative gid caused this to be
5599 noticed. The fix allows for either to be negative.
5601 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5602 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5605 PH/36 The change PH/12 above was broken. Fixed it.
5607 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5608 the grounds that routing the same address twice would always produce the
5609 same answer. This might have been true once, but it is certainly no
5610 longer true now. Routing a child address may depend on the previous
5611 routing that produced that child. Some complicated redirection strategies
5612 went wrong when messages had multiple recipients, and made Exim's
5613 behaviour dependent on the order in which the addresses were given.
5615 I have moved the duplicate checking until after the routing is complete.
5616 Exim scans the addresses that are assigned to local and remote
5617 transports, and removes any duplicates. This means that more work will be
5618 done, as duplicates will always all be routed, but duplicates are
5619 presumably rare, so I don't expect this is of any significance.
5621 For deliveries to pipes, files, and autoreplies, the duplicate checking
5622 still happens during the routing process, since they are not going to be
5625 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5626 It corrects a timeout issue with spamd. This is Ian's comment: "The
5627 background is that sometimes spamd either never reads data from a
5628 connection it has accepted, or it never writes response data. The exiscan
5629 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5630 blindly assumes that writes won't block so it may never time out."
5632 PH/39 Allow G after quota size as well as K and M.
5634 PH/40 The value set for $authenticated_id in an authenticator may not contain
5635 binary zeroes or newlines because the value is written to log lines and
5636 to spool files. There was no check on this. Now the value is run through
5637 the string_printing() function so that such characters are converted to
5638 printable escape sequences.
5640 PH/41 $message_linecount is a new variable that contains the total number of
5641 lines in the message. Compare $body_linecount, which is the count for the
5644 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5645 bounce and delay warning messages, except in certain special cases, which
5648 (a) An SMTP error message from a remote host;
5649 (b) A message specified in a :fail: redirection;
5650 (c) A message specified in a "fail" command in a system filter;
5651 (d) A message specified in a FAIL return from the queryprogram router;
5652 (e) A message specified by the cannot_route_message router option.
5654 In these cases only, Exim does include the error details in bounce and
5655 warning messages. There are also a few cases where bland messages such
5656 as "unrouteable address" or "local delivery error" are given.
5658 PH/43 $value is now also set for the "else" part of a ${run expansion.
5660 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5661 being worked on, but at least Exim now implements the latest version to
5664 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5665 process to complete was treated as a delivery failure, a timeout while
5666 writing the message to the pipe was logged, but erroneously treated as a
5667 successful delivery. Such timeouts include transport filter timeouts. For
5668 consistency with the overall process timeout, these timeouts are now
5669 treated as errors, giving rise to delivery failures by default. However,
5670 there is now a new Boolean option for the pipe transport called
5671 timeout_defer, which, if set TRUE, converts the failures into defers for
5672 both kinds of timeout. A transport filter timeout is now identified in
5675 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5676 systems where "make" and "gmake" are different, calling "gmake" at top
5677 level broke things. I've arranged for the value of $(MAKE) to be passed
5678 from the Makefile to this script so that it can call the same version of
5682 A note about Exim versions 4.44 and 4.50
5683 ----------------------------------------
5685 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5686 changes of various kinds. As a consequence, a big documentation update was
5687 needed. This delayed the release for rather longer than seemed good, especially
5688 in the light of a couple of (minor) security issues. Therefore, the changes
5689 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5690 release. So 4.44 and 4.50 are in effect two different branches that both start
5693 I have left the 4.50 change log unchanged; it contains all the changes since
5694 4.43. The change log for 4.44 is below; many of its items are identical to
5695 those for 4.50. This seems to be the most sensible way to preserve the
5696 historical information.
5702 1. Minor wording change to the doc/README.SIEVE file.
5704 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5705 computation of the current number of files was incorrect.
5707 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5708 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5711 4. Give more explanation in the error message when the command for a transport
5712 filter fails to execute.
5714 5. There are several places where Exim runs a non-Exim command in a
5715 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5716 was being done only for the command run by the queryprogram router. It is
5717 now done for all such subprocesses. The other cases are: ${run, transport
5718 filters, and the commands run by the lmtp and pipe transports.
5720 6. Added CONFIGURE_GROUP build-time option.
5722 7. Some older OS have a limit of 256 on the maximum number of file
5723 descriptors. Exim was using setrlimit() to set 1000 as a large value
5724 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5725 systems. I've change it so that if it can't get 1000, it tries for 256.
5727 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5728 was an oversight, and furthermore, ever since the addition of extra
5729 controls (e.g. 4.43/32), the checks on when to allow different forms of
5730 "control" were broken. There should now be diagnostics for all cases when a
5731 control that does not make sense is encountered.
5733 9. Added the /retain_sender option to "control=submission".
5735 10. $recipients is now available in the predata ACL (oversight).
5737 11. Tidy the search cache before the fork to do a delivery from a message
5738 received from the command line. Otherwise the child will trigger a lookup
5739 failure and thereby defer the delivery if it tries to use (for example) a
5740 cached ldap connection that the parent has called unbind on.
5742 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5743 of $address_data from the recipient verification was clobbered by the
5744 sender verification.
5746 13. The value of address_data from a sender verification is now available in
5747 $sender_address_data in subsequent conditions in the ACL statement.
5749 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5751 15. Added a new option "connect=<time>" to callout options, to set a different
5754 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5755 was its contents. (It was OK if the option was not defined at all.)
5757 17. A "Completed" log line is now written for messages that are removed from
5758 the spool by the -Mrm option.
5760 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5761 information about exactly what failed.
5763 19. Added -dd to debug only the daemon process.
5765 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5766 handles timeouts, both on the server side and network timeouts. Renamed the
5767 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5769 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5770 It is now set to "smtps".
5772 22. $host_address is now set to the target address during the checking of
5773 ignore_target_hosts.
5775 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5776 being passed; this would have caused $sender_host_name to have been used if
5777 matching the list had actually called for a host name (not very likely,
5778 since this list is usually IP addresses). A host name is now passed as
5781 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5782 code that specifies a non-restarting handler (typically sigaction() in
5783 modern systems) in an attempt to fix a rare and obscure crash bug.
5785 25. Narrowed the window for a race in the daemon that could cause it to ignore
5786 SIGCHLD signals. This is not a major problem, because they are used only to
5787 wake it up if nothing else does.
5789 26. A malformed maildirsize file could cause Exim to calculate negative values
5790 for the mailbox size or file count. Odd effects could occur as a result.
5791 The maildirsize information is now recalculated if the size or filecount
5794 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5795 support for a long time. Removed HAVE_SYS_VFS_H.
5797 28. Installed the latest version of exipick from John Jetmore.
5799 29. In an address list, if the pattern was not a regular expression, an empty
5800 subject address (from a bounce message) matched only if the pattern was an
5801 empty string. Non-empty patterns were not even tested. This was the wrong
5802 because it is perfectly reasonable to use an empty address as part of a
5803 database query. An empty address is now tested by patterns that are
5804 lookups. However, all the other forms of pattern expect the subject to
5805 contain a local part and a domain, and therefore, for them, an empty
5806 address still always fails if the pattern is not itself empty.
5808 30. Exim went into a mad DNS loop when attempting to do a callout where the
5809 host was specified on an smtp transport, and looking it up yielded more
5810 than one IP address.
5812 31. Re-factored the code for checking spool and log partition space into a
5813 function that finds that data and another that does the check. The former
5814 is then used to implement four new variables: $spool_space, $log_space,
5815 $spool_inodes, and $log_inodes.
5817 32. The RFC2047 encoding function was originally intended for short strings
5818 such as real names; it was not keeping to the 75-character limit for
5819 encoded words that the RFC imposes. It now respects the limit, and
5820 generates multiple encoded words if necessary. To be on the safe side, I
5821 have increased the buffer size for the ${rfc2047: expansion operator from
5824 33. It is now permitted to omit both strings after an "if" condition; if the
5825 condition is true, the result is "true". As before, when the second string
5826 is omitted, a false condition yields an empty string. This makes it less
5827 cumbersome to write custom ACL and router conditions.
5829 34. Failure to deliver a bounce message always caused it to be frozen, even if
5830 there was an errors_to setting on the router. The errors_to setting is now
5833 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5834 canonical form (fully expanded) before being placed in
5835 $sender_host_address.
5837 36. The table in the code that translates DNS record types into text (T_A to
5838 "A" for instance) was missing entries for NS and CNAME. It is just possible
5839 that this could have caused confusion if both these types were looked up
5840 for the same domain, because the text type is used as part of Exim's
5841 per-process caching. But the chance of anyone hitting this buglet seems
5844 37. The dnsdb lookup has been extended in a number of ways.
5846 (1) There is a new type, "zns", which walks up the domain tree until it
5847 finds some nameserver records. It should be used with care.
5849 (2) There is a new type, "mxh", which is like "mx" except that it returns
5850 just the host names, not the priorities.
5852 (3) It is now possible to give a list of domains (or IP addresses) to be
5853 looked up. The behaviour when one of the lookups defers can be
5854 controlled by a keyword.
5856 (4) It is now possible to specify the separator character for use when
5857 multiple records are returned.
5859 38. The dnslists ACL condition has been extended: it is now possible to supply
5860 a list of IP addresses and/or domains to be looked up in a particular DNS
5863 39. Added log_selector=+queue_time_overall.
5865 40. When running the queue in the test harness, wait just a tad after forking a
5866 delivery process, to get repeatability of debugging output.
5868 41. Include certificate and key file names in error message when GnuTLS fails
5869 to set them up, because the GnuTLS error message doesn't include the name
5870 of the failing file when there is a problem reading it.
5872 42. Allow both -bf and -bF in the same test run.
5874 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5876 44. The "Exiscan patch" is now merged into the mainline Exim source.
5878 45. Sometimes the final signoff response after QUIT could fail to get
5879 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5880 < 0 before doing a fflush(). This bug looks as though it goes back to the
5881 introduction of TLS in release 3.20, but "sometimes" must have been rare
5882 because the tests only now provoked it.
5884 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5885 (this can affect the format of dates).
5887 47. exim_tidydb, when checking for the continued existence of a message for
5888 which it has found a message-specific retry record, was not finding
5889 messages that were in split spool directories. Consequently, it was
5890 deleting retry records that should have stayed in existence.
5892 48. Steve fixed some bugs in eximstats.
5894 49. The SPA authentication driver was not abandoning authentication and moving
5895 on to the next authenticator when an expansion was forced to fail,
5896 contradicting the general specification for all authenticators. Instead it
5897 was generating a temporary error. It now behaves as specified.
5899 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5900 (the order specifies the preference for clients). The order is now AES256,
5901 AES128, 3DES, ARCFOUR128.
5903 51. Small patch to Sieve code - explicitly set From: when generating an
5906 52. Exim crashed if a remote delivery caused a very long error message to be
5907 recorded - for instance if somebody sent an entire SpamAssassin report back
5908 as a large number of 550 error lines. This bug was coincidentally fixed by
5909 increasing the size of one of Exim's internal buffers (big_buffer) that
5910 happened as part of the Exiscan merge. However, to be on the safe side, I
5911 have made the code more robust (and fixed the comments that describe what
5914 53. Now that there can be additional text after "Completed" in log lines (if
5915 the queue_time_overall log selector is set), a one-byte patch to exigrep
5916 was needed to allow it to recognize "Completed" as not the last thing in
5919 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5920 patch that reportedly fixes this has been added. I am not expert enough to
5921 create a test for it. This is what the patch creator wrote:
5923 "I found a little strange behaviour of ldap code when working with
5924 Windows 2003 AD Domain, where users was placed in more than one
5925 Organization Units. When I tried to give exim partial DN, the exit code
5926 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5927 But simultaneously result of request was absolutely normal ldap result,
5928 so I produce this patch..."
5930 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5931 REFERENCE, so I have modified the code to exclude the patch when that macro
5934 55. Some experimental protocols are using DNS PTR records for new purposes. The
5935 keys for these records are domain names, not reversed IP addresses. The
5936 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5937 leaves it alone. Component reversal etc. now happens only for IP addresses.
5940 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5942 57. Double the size of the debug message buffer (to 2048) so that more of very
5943 long debug lines gets shown.
5945 58. The exicyclog utility now does better if the number of log files to keep
5946 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5948 59. Two changes related to the smtp_active_hostname option:
5950 (1) $smtp_active_hostname is now available as a variable.
5951 (2) The default for smtp_banner uses $smtp_active_hostname instead
5952 of $primary_hostname.
5954 60. The host_aton() function is supposed to be passed a string that is known
5955 to be a valid IP address. However, in the case of IPv6 addresses, it was
5956 not checking this. This is a hostage to fortune. Exim now panics and dies
5957 if the condition is not met. A case was found where this could be provoked
5958 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5959 components; fortuitously, this particular loophole had already been fixed
5960 by change 4.50/55 above.
5962 If there are any other similar loopholes, the new check in host_aton()
5963 itself should stop them being exploited. The report I received stated that
5964 data on the command line could provoke the exploit when Exim was running as
5965 exim, but did not say which command line option was involved. All I could
5966 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5967 running as the user.
5970 61. There was a buffer overflow vulnerability in the SPA authentication code
5971 (which came originally from the Samba project). I have added a test to the
5972 spa_base64_to_bits() function which I hope fixes it.
5975 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5976 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5978 63. The daemon start-up calls getloadavg() while still root for those OS that
5979 need the first call to be done as root, but it missed one case: when
5980 deliver_queue_load_max is set with deliver_drop_privilege. This is
5981 necessary for the benefit of the queue runner, because there is no re-exec
5982 when deliver_drop_privilege is set.
5984 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5985 This has been fixed.
5987 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5988 was in use, was not putting the data itself into the right store pool;
5989 consequently, it could be overwritten for a subsequent message in the same
5990 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5993 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5995 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5996 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5997 the function were treating the return as a boolean value, which happened to
5998 work because 0=false and not-0=true, but is not correct code.
6000 68. The host_aton() function was not handling scoped IPv6 addresses (those
6001 with, for example, "%eth0" on the end) correctly.
6003 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6004 negated items (that is, ~something) in unsigned ints. Some compilers
6005 apparently mutter when there is no cast.
6007 70. If an address verification called from an ACL failed, and did not produce a
6008 user-specific message (i.e. there was only a "system" message), nothing was
6009 put in $acl_verify_message. In this situation, it now puts the system
6012 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6013 session; change 4.31/43 added the unwanted input to the log line - except
6014 that it did not do this in the start of session case. It now does.
6016 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6017 This is wrong and can cause the other end to generate a synchronization
6018 error if it is another Exim or anything else that does the synchronization
6019 check. A QUIT command is no longer sent after a timeout.
6021 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6022 during host lookups.
6024 74. The defer_ok option of callout verification was not working if it was used
6025 when verifying addresses in header lines, that is, for this case:
6027 verify = header_sender/callout=defer_ok
6029 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6030 those file descriptors could be used for SMTP connections. If anything
6031 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6032 could be sent to the SMTP client, causing chaos. The daemon now opens
6033 stdin, stdout, and stderr to /dev/null when it puts itself into the
6036 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6037 log by default. The user can override this with suitable Perl magic.
6039 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6040 the log message when discard triggers, was not working for the DATA ACL or
6041 for the non-SMTP ACL.
6043 78. Error message wording change in sieve.c.
6045 79. If smtp_accept_max_per_host was set, the number of connections could be
6046 restricted to fewer than expected, because the daemon was trying to set up
6047 a new connection before checking whether the processes handling previous
6048 connections had finished. The check for completed processes is now done
6049 earlier. On busy systems, this bug wouldn't be noticed because something
6050 else would have woken the daemon, and it would have reaped the completed
6053 80. If a message was submitted locally by a user whose login name contained one
6054 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6055 It caused a spool format error. I have fixed the spool reading code. A
6056 related problem was that the "from" clause in the Received: line became
6057 illegal because of the space(s). It is now covered by ${quote_local_part.
6059 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6062 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6064 83. Patch from Sieve maintainer to fix unterminated string problem in
6065 "vacation" handling.
6067 84. Some minor changes to the Linux configuration files to help with other
6068 OS variants using glibc.
6070 85. One more patch for Sieve to update vacation handling to latest spec.
6073 ----------------------------------------------------
6074 See the note above about the 4.44 and 4.50 releases.
6075 ----------------------------------------------------
6081 1. Change 4.43/35 introduced a bug that caused file counts to be
6082 incorrectly computed when quota_filecount was set in an appendfile
6085 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6086 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6089 3. Give more explanation in the error message when the command for a transport
6090 filter fails to execute.
6092 4. There are several places where Exim runs a non-Exim command in a
6093 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6094 was being done only for the command run by the queryprogram router. It is
6095 now done for all such subprocesses. The other cases are: ${run, transport
6096 filters, and the commands run by the lmtp and pipe transports.
6098 5. Some older OS have a limit of 256 on the maximum number of file
6099 descriptors. Exim was using setrlimit() to set 1000 as a large value
6100 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6101 systems. I've change it so that if it can't get 1000, it tries for 256.
6103 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6104 was an oversight, and furthermore, ever since the addition of extra
6105 controls (e.g. 4.43/32), the checks on when to allow different forms of
6106 "control" were broken. There should now be diagnostics for all cases when a
6107 control that does not make sense is encountered.
6109 7. $recipients is now available in the predata ACL (oversight).
6111 8. Tidy the search cache before the fork to do a delivery from a message
6112 received from the command line. Otherwise the child will trigger a lookup
6113 failure and thereby defer the delivery if it tries to use (for example) a
6114 cached ldap connection that the parent has called unbind on.
6116 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6117 of $address_data from the recipient verification was clobbered by the
6118 sender verification.
6120 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6121 was its contents. (It was OK if the option was not defined at all.)
6123 11. A "Completed" log line is now written for messages that are removed from
6124 the spool by the -Mrm option.
6126 12. $host_address is now set to the target address during the checking of
6127 ignore_target_hosts.
6129 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6130 being passed; this would have caused $sender_host_name to have been used if
6131 matching the list had actually called for a host name (not very likely,
6132 since this list is usually IP addresses). A host name is now passed as
6135 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6136 code that specifies a non-restarting handler (typically sigaction() in
6137 modern systems) in an attempt to fix a rare and obscure crash bug.
6139 15. Narrowed the window for a race in the daemon that could cause it to ignore
6140 SIGCHLD signals. This is not a major problem, because they are used only to
6141 wake it up if nothing else does.
6143 16. A malformed maildirsize file could cause Exim to calculate negative values
6144 for the mailbox size or file count. Odd effects could occur as a result.
6145 The maildirsize information is now recalculated if the size or filecount
6148 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6149 support for a long time. Removed HAVE_SYS_VFS_H.
6151 18. Updated exipick to current release from John Jetmore.
6153 19. Allow an empty sender to be matched against a lookup in an address list.
6154 Previously the only cases considered were a regular expression, or an
6157 20. Exim went into a mad DNS lookup loop when doing a callout where the
6158 host was specified on the transport, if the DNS lookup yielded more than
6161 21. The RFC2047 encoding function was originally intended for short strings
6162 such as real names; it was not keeping to the 75-character limit for
6163 encoded words that the RFC imposes. It now respects the limit, and
6164 generates multiple encoded words if necessary. To be on the safe side, I
6165 have increased the buffer size for the ${rfc2047: expansion operator from
6168 22. Failure to deliver a bounce message always caused it to be frozen, even if
6169 there was an errors_to setting on the router. The errors_to setting is now
6172 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6173 canonical form (fully expanded) before being placed in
6174 $sender_host_address.
6176 24. Updated eximstats to version 1.33
6178 25. Include certificate and key file names in error message when GnuTLS fails
6179 to set them up, because the GnuTLS error message doesn't include the name
6180 of the failing file when there is a problem reading it.
6182 26. Expand error message when OpenSSL has problems setting up cert/key files.
6185 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6186 (this can affect the format of dates).
6188 28. exim_tidydb, when checking for the continued existence of a message for
6189 which it has found a message-specific retry record, was not finding
6190 messages that were in split spool directories. Consequently, it was
6191 deleting retry records that should have stayed in existence.
6193 29. eximstats updated to version 1.35
6194 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6195 1.35 - bugfix such that pie charts by volume are generated correctly
6197 30. The SPA authentication driver was not abandoning authentication and moving
6198 on to the next authenticator when an expansion was forced to fail,
6199 contradicting the general specification for all authenticators. Instead it
6200 was generating a temporary error. It now behaves as specified.
6202 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6203 (the order specifies the preference for clients). The order is now AES256,
6204 AES128, 3DES, ARCFOUR128.
6206 31. Small patch to Sieve code - explicitly set From: when generating an
6209 32. Exim crashed if a remote delivery caused a very long error message to be
6210 recorded - for instance if somebody sent an entire SpamAssassin report back
6211 as a large number of 550 error lines. This bug was coincidentally fixed by
6212 increasing the size of one of Exim's internal buffers (big_buffer) that
6213 happened as part of the Exiscan merge. However, to be on the safe side, I
6214 have made the code more robust (and fixed the comments that describe what
6217 33. Some experimental protocols are using DNS PTR records for new purposes. The
6218 keys for these records are domain names, not reversed IP addresses. The
6219 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6220 leaves it alone. Component reversal etc. now happens only for IP addresses.
6223 34. The host_aton() function is supposed to be passed a string that is known
6224 to be a valid IP address. However, in the case of IPv6 addresses, it was
6225 not checking this. This is a hostage to fortune. Exim now panics and dies
6226 if the condition is not met. A case was found where this could be provoked
6227 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6228 components; fortuitously, this particular loophole had already been fixed
6229 by change 4.50/55 or 4.44/33 above.
6231 If there are any other similar loopholes, the new check in host_aton()
6232 itself should stop them being exploited. The report I received stated that
6233 data on the command line could provoke the exploit when Exim was running as
6234 exim, but did not say which command line option was involved. All I could
6235 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6236 running as the user.
6239 35. There was a buffer overflow vulnerability in the SPA authentication code
6240 (which came originally from the Samba project). I have added a test to the
6241 spa_base64_to_bits() function which I hope fixes it.
6244 36. The daemon start-up calls getloadavg() while still root for those OS that
6245 need the first call to be done as root, but it missed one case: when
6246 deliver_queue_load_max is set with deliver_drop_privilege. This is
6247 necessary for the benefit of the queue runner, because there is no re-exec
6248 when deliver_drop_privilege is set.
6250 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6251 was in use, was not putting the data itself into the right store pool;
6252 consequently, it could be overwritten for a subsequent message in the same
6253 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6256 38. Sometimes the final signoff response after QUIT could fail to get
6257 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6258 < 0 before doing a fflush(). This bug looks as though it goes back to the
6259 introduction of TLS in release 3.20, but "sometimes" must have been rare
6260 because the tests only now provoked it.
6266 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6267 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6268 Now it returns an integer. A number of calls were still expecting a T/F
6269 return. Fortuitously, in all cases, the tests worked in OK situations,
6270 which is the norm. However, things would have gone wrong on any write
6271 failures on the smtp file descriptor. This function is used when sending
6272 messages over SMTP and also when doing verify callouts.
6274 2. When Exim is called to do synchronous delivery of a locally submitted
6275 message (the -odf or -odi options), it no longer closes stderr before doing
6278 3. Implemented the mua_wrapper option.
6280 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6282 5. Implemented the functions header_remove(), header_testname(),
6283 header_add_at_position(), and receive_remove_recipient(), and exported them
6286 6. If an ACL "warn" statement specified the addition of headers, Exim already
6287 inserted X-ACL-Warn: at the start if there was no header name. However, it
6288 was not making this test for the second and subsequent header lines if
6289 there were newlines in the string. This meant that an invalid header could
6290 be inserted if Exim was badly configured.
6292 7. Allow an ACL "warn" statement to add header lines at the start or after all
6293 the Received: headers, as well as at the end.
6295 8. Added the rcpt_4xx retry error code.
6297 9. Added postmaster_mailfrom=xxx to callout verification option.
6299 10. Added mailfrom=xxxx to the callout verification option, for verify=
6302 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6303 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6305 12. Inserted some casts to stop certain compilers warning when using pointer
6306 differences as field lengths or precisions in printf-type calls (mostly
6307 affecting debugging statements).
6309 13. Added optional readline() support for -be (dynamically loaded).
6311 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6312 same clock tick as a message's arrival, so that its received time was the
6313 same as the "first fail" time on the retry record, and that message
6314 remained on the queue past the ultimate address timeout, every queue runner
6315 would try a delivery (because it was past the ultimate address timeout) but
6316 after another failure, the ultimate address timeout, which should have then
6317 bounced the address, did not kick in. This was a "< instead of <=" error;
6318 in most cases the first failure would have been in the next clock tick
6319 after the received time, and all would be well.
6321 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6322 being recognized when the domain list was tested by the match_domain
6323 condition in an expansion string.
6325 16. Added the ${str2b64: operator.
6327 17. Exim was always calling setrlimit() to set a large limit for the number of
6328 processes, without checking whether the existing limit was already
6329 adequate. (It did check for the limit on file descriptors.) Furthermore,
6330 errors from getrlimit() and setrlimit() were being ignored. Now they are
6331 logged to the main and panic logs, but Exim does carry on, to try to do its
6332 job under whatever limits there are.
6334 18. Imported PCRE 5.0.
6336 19. Trivial typo in log message " temporarily refused connection" (the leading
6339 20. If the log selector return_path_on_delivery was set and an address was
6340 redirected to /dev/null, the delivery process crashed because it assumed
6341 that a return path would always be set for a "successful" delivery. In this
6342 case, the whole delivery is bypassed as an optimization, and therefore no
6345 21. Internal re-arrangement: the function for sending a challenge and reading
6346 a response while authentication was assuming a zero-terminated challenge
6347 string. It's now changed to take a pointer and a length, to allow for
6348 binary data in such strings.
6350 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6352 23. Exim was not respecting finduser_retries when seeking the login of the
6353 uid under which it was called; it was always trying 10 times. (The default
6354 setting of finduser_retries is zero.) Also, it was sleeping after the final
6355 failure, which is pointless.
6357 24. Implemented tls_on_connect_ports.
6359 25. Implemented acl_smtp_predata.
6361 26. If the domain in control=submission is set empty, Exim assumes that the
6362 authenticated id is a complete email address when it generates From: or
6363 Sender: header lines.
6365 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6366 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6367 chown and chgrp in /bin and hostname in /usr/bin.
6369 28. Exim was keeping the "process log" file open after each use, just as it
6370 does for the main log. This opens the possibility of it remaining open for
6371 long periods when the USR1 signal hits a daemon. Occasional processlog
6372 errors were reported, that could have been caused by this. Anyway, it seems
6373 much more sensible not to leave this file open at all, so that is what now
6376 29. The long-running daemon process does not normally write to the log once it
6377 has entered its main loop, and it closes the log before doing so. This is
6378 so that log files can straightforwardly be renamed and moved. However,
6379 there are a couple of unusual error situations where the daemon does write
6380 log entries, and I had neglected to close the log afterwards.
6382 30. The text of an SMTP error response that was received during a remote
6383 delivery was being truncated at 512 bytes. This is too short for some of
6384 the long messages that one sometimes sees. I've increased the limit to
6387 31. It is now possible to make retry rules that apply only when a message has a
6388 specific sender, in particular, an empty sender.
6390 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6391 it possible to be selective about when SMTP synchronization is enforced.
6393 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6395 32. Implemented hosts_connection_nolog.
6397 33. Added an ACL for QUIT.
6399 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6402 35. Added mailbox_size and mailbox_filecount to appendfile.
6404 36. Added control = no_multiline_responses to ACLs.
6406 37. There was a bug in the logic of the code that waits for the clock to tick
6407 in the case where the clock went backwards by a substantial amount such
6408 that the microsecond fraction of "now" was more than the microsecond
6409 fraction of "then" (but the whole seconds number was less).
6411 38. Added support for the libradius Radius client library this is found on
6412 FreeBSD (previously only the radiusclient library was supported).
6418 1. When certain lookups returned multiple values in the form name=value, the
6419 quoting of the values was not always being done properly. Specifically:
6420 (a) If the value started with a double quote, but contained no whitespace,
6422 (b) If the value contained whitespace other than a space character (i.e.
6423 tabs or newlines or carriage returns) it was not quoted.
6424 This fix has been applied to the mysql and pgsql lookups by writing a
6425 separate quoting function and calling it from the lookup code. The fix
6426 should probably also be applied to nisplus, ibase and oracle lookups, but
6427 since I cannot test any of those, I have not disturbed their existing code.
6429 2. A hit in the callout cache for a specific address caused a log line with no
6430 reason for rejecting RCPT. Now it says "Previous (cached) callout
6431 verification failure".
6433 3. There was an off-by-one bug in the queryprogram router. An over-long
6434 return line was truncated at 256 instead of 255 characters, thereby
6435 overflowing its buffer with the terminating zero. As well as fixing this, I
6436 have increased the buffer size to 1024 (and made a note to document this).
6438 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6439 when Exim is waiting for an SMTP response from a remote server, Exim
6440 restarts its select() call on the socket, thereby resetting its timeout.
6441 This is not a problem when such interrupts are rare. Somebody set up a cron
6442 job to run exiwhat every 2 minutes, which is less than the normal select()
6443 timeout (5 or 10 minutes). This meant that the select() timeout never
6444 kicked in because it was always reset. I have fixed this by comparing the
6445 time when an interrupt arrives with the time at the start of the first call
6446 to select(). If more time than the timeout has elapsed, the interrupt is
6447 treated as a timeout.
6449 5. Some internal re-factoring in preparation for the addition of Sieve
6450 extensions (by MH). In particular, the "personal" test is moved to a
6451 separate function, and given an option for scanning Cc: and Bcc: (which is
6452 not set for Exim filters).
6454 6. When Exim created an email address using the login of the caller as the
6455 local part (e.g. when creating a From: or Sender: header line), it was not
6456 quoting the local part when it contained special characters such as @.
6458 7. Installed new OpenBSD configuration files.
6460 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6461 try to make them clearer.
6463 9. Callout options, other than the timeout value, were being ignored when
6464 verifying sender addresses in header lines. For example, when using
6466 verify = header_sender/callout=no_cache
6468 the cache was (incorrectly) being used.
6470 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6471 only the Cygwin environment.
6473 11. When return_path_on_delivery was set as a log selector, if different remote
6474 addresses in the same message used different return paths and parallel
6475 remote delivery occurred, the wrong values would sometimes be logged.
6476 (Whenever a remote delivery process finished, the return path value from
6477 the most recently started remote delivery process was logged.)
6479 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6480 lines when AUTH and/or TLS are in use. This is the "received protocol"
6481 field. Exim used to use "asmtp" for authenticated SMTP, without any
6482 indication (in the protocol name) for TLS use. Now it follows the RFC and
6483 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6484 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6485 names appear in log lines as well as in Received: header lines.
6487 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6488 extensions, and comparison tests, and to fix some bugs.
6490 14. Changes to the "personal" filter test:
6492 (1) The test was buggy in that it was just doing the equivalent of
6493 "contains" tests on header lines. For example, if a user's address was
6494 anne@some.where, the "personal" test would incorrectly be true for
6496 To: susanne@some.where
6498 This test is now done by extracting each address from the header in turn,
6499 and checking the entire address. Other tests that are part of "personal"
6500 are now done using regular expressions (for example, to check local parts
6501 of addresses in From: header lines).
6503 (2) The list of non-personal local parts in From: addresses has been
6504 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6505 taken from the Sieve specification recommendations.
6507 (3) If the message contains any header line starting with "List-" it is
6508 treated as non-personal.
6510 (4) The test for "circular" in the Subject: header line has been removed
6511 because it now seems ill-conceived.
6513 15. Minor typos in src/EDITME comments corrected.
6515 16. Installed latest exipick from John Jetmore.
6517 17. If headers_add on a router specified a text string that was too long for
6518 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6519 of string_sprintf() is now avoided.
6521 18. $message_body_size was not set (it was always zero) when running the DATA
6522 ACL and the local_scan() function.
6524 19. For the "mail" command in an Exim filter, no default was being set for
6525 the once_repeat time, causing a random time value to be used if "once" was
6526 specified. (If the value happened to be <= 0, no repeat happened.) The
6527 default is now 0s, meaning "never repeat". The "vacation" command was OK
6528 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6529 (I found it when inspecting the code).
6531 20. There is now an overall timeout for performing a callout verification. It
6532 defaults to 4 times the callout timeout, which applies to individual SMTP
6533 commands during the callout. The overall timeout applies when there is more
6534 than one host that can be tried. The timeout is checked before trying the
6535 next host. This prevents very long delays if there are a large number of
6536 hosts and all are timing out (e.g. when the network connections are timing
6537 out). The value of the overall timeout can be changed by specifying an
6538 additional sub-option for "callout", called "maxwait". For example:
6540 verify = sender/callout=5s,maxwait=20s
6542 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6543 to the end before writing, but this should make it even safer).
6545 22. Exim was forgetting that it had advertised PIPELINING for the second and
6546 subsequent messages on an SMTP connection. It was also not resetting its
6547 memory on STARTTLS and an internal HELO.
6549 23. When Exim logs an SMTP synchronization error within a session, it now
6550 records whether PIPELINING has been advertised or not.
6552 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6553 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6554 rather than long int.
6556 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6558 26. Added the never_mail option to autoreply.
6564 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6565 crash if the getsockname() call failed; this can happen if a connection is
6566 closed very soon after it is established. The problem was simply in the
6567 order in which certain operations were done, causing Exim to try to write
6568 to the SMTP stream before it had set up the file descriptor. The bug has
6569 been fixed by making things happen in the correct order.
6575 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6576 before the connection was closed, thus losing the rejection response.
6578 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6579 some early Solaris releases, but causes trouble in current releases where
6580 socklen_t is defined.
6582 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6585 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6588 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6589 that releasing the top of it at the end releases what was used for sub-
6590 expansions (unless the block got too big). However, discard this block if
6591 the first thing is a variable or header, so that we can use its block when
6592 it is dynamic (useful for very large $message_headers, for example).
6594 6. Lookups now cache *every* query, not just the most recent. A new, separate
6595 store pool is used for this. It can be recovered when all lookup caches are
6596 flushed. Lookups now release memory at the end of their result strings.
6597 This has involved some general refactoring of the lookup sources.
6599 7. Some code has been added to the store_xxx() functions to reduce the amount
6600 of flapping under certain conditions.
6602 8. log_incoming_interface used to affect only the <= reception log lines. Now
6603 it causes the local interface and port to be added to several more SMTP log
6604 lines, for example "SMTP connection from", and rejection lines.
6606 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6608 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6610 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6611 could be overwritten at the end of the current message (or the start of a
6612 new message if it was set in a HELO ACL). The value is now preserved for
6613 the duration of the SMTP connection.
6615 12. If a transport had a headers_rewrite setting, and a matching header line
6616 contained an unqualified address, that address was qualified, even if it
6617 did not match any rewriting rules. The underlying bug was that the values
6618 of the flags that permit the existence of unqualified sender and recipient
6619 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6620 non-local messages, and by -bnq for local messages) were not being
6621 preserved with the message after it was received.
6623 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6624 "next input=" as part of the text comprising the host identity instead of
6625 the correct text. The code was using the same buffer for two different
6626 strings. However, depending on which order the printing function evaluated
6627 its arguments, the bug did not always show up. Under Linux, for example, my
6628 test suite worked just fine.
6630 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6631 doesn't work with some older versions of Perl. It has been changed to "my",
6632 which in any case is probably the better facility to use.
6634 15. A really picky compiler found some instances of statements for creating
6635 error messages that either had too many or two few arguments for the format
6638 16. The size of the buffer for calls to the DNS resolver has been increased
6639 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6640 for addresses that have a lot of PTR records. This alleviates a problem; it
6641 does not fully solve it.
6643 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6644 buffer now truncates the list and logs the incident, which is the same
6645 action as happens when Exim is looking up a host name and its aliases.
6646 Previously in this situation something unpredictable would happen;
6647 sometimes it was "internal error: store_reset failed".
6649 18. If a server dropped the connection unexpectedly when an Exim client was
6650 using GnuTLS and trying to read a response, the client delivery process
6651 crashed while trying to generate an error log message.
6653 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6654 string, for example:
6656 warn message = H1: something\nH2: something
6658 the text was added as a single header line from Exim's point of view
6659 though it ended up OK in the delivered message. However, searching for the
6660 second and subsequent header lines using $h_h2: did not work. This has been
6661 fixed. Similarly, if a system filter added multiple headers in this way,
6662 the routers could not see them.
6664 20. Expanded the error message when iplsearch is called with an invalid key to
6665 suggest using net-iplsearch in a host list.
6667 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6668 ACLs are no longer actually imposed (and a message to that effect is
6671 22. If a "gecos" field in a passwd entry contained escaped characters, in
6672 particular, if it contained a \" sequence, Exim got it wrong when building
6673 a From: or a Sender: header from that name. A second bug also caused
6674 incorrect handling when an unquoted " was present following a character
6675 that needed quoting.
6677 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6678 was not being matched caselessly.
6680 24. Arranged for all hyphens in the exim.8 source to be escaped with
6683 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6684 properly. Recipient callout cache records were still being keyed to include
6685 the sender, even when use_sender was set false. This led to far more
6686 callouts that were necessary. The sender is no longer included in the key
6687 when use_sender is false.
6689 26. Added "control = submission" modifier to ACLs.
6691 27. Added the ${base62d: operator to decode base 62 numbers.
6693 28. dnsdb lookups can now access SRV records.
6695 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6696 the configuration file.
6698 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6699 (-v) mode. This makes the output for a verbose queue run more intelligible.
6701 31. Added a use_postmaster feature to recipient callouts.
6703 32. Added the $body_zerocount variable, containing the number of binary zero
6704 bytes in the message body.
6706 33. The time of last modification of the "new" subdirectory is now used as the
6707 "mailbox time last read" when there is a quota error for a maildir
6710 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6712 35. Added +ignore_unknown as a special item in host lists.
6714 36. Code for decoding IPv6 addresses in host lists is now included, even if
6715 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6716 address was recognized as an IP address, but was then not correctly decoded
6717 into binary, causing unexpected and incorrect effects when compared with
6724 1. Very minor rewording of debugging text in manualroute to say "list of
6725 hosts" instead of "hostlist".
6727 2. If verify=header_syntax was set, and a header line with an unqualified
6728 address (no domain) and a large number of spaces between the end of the
6729 name and the colon was received, the reception process suffered a buffer
6730 overflow, and (when I tested it) crashed. This was caused by some obsolete
6731 code that should have been removed. The fix is to remove it!
6733 3. When running in the test harness, delay a bit after writing a bounce
6734 message to get a bit more predictability in the log output.
6736 4. Added a call to search_tidyup() just before forking a reception process. In
6737 theory, someone could use a lookup in the expansion of smtp_accept_max_
6738 per_host which, without the tidyup, could leave open a database connection.
6740 5. Added the variables $recipient_data and $sender_data which get set from a
6741 lookup success in an ACL "recipients" or "senders" condition, or a router
6742 "senders" option, similar to $domain_data and $local_part_data.
6744 6. Moved the writing of debug_print from before to after the "senders" test
6747 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6748 problems for message scanning, either using a data ACL, or using
6749 local_scan() because the Received: header was not generated till after they
6750 were called (in order to set the time as the time of reception completion).
6751 I have revised the way this works. The header is now generated after the
6752 body is received, but before the ACL or local_scan() are called. After they
6753 are run, the timestamp in the header is updated.
6759 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6760 before starting a queue runner without re-exec. This happened only when
6761 deliver_drop_privilege was set or when the Exim user was set to root. The
6762 effect of the bug was that timeouts during subsequent deliveries caused
6763 crashes instead of being properly handled. The handler is now left at its
6764 default (and expected) setting.
6766 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6767 message, again when deliver_drop_privilege is set or Exim is run as root.
6768 The bug described in (1) was not present in this case, but the tidying up
6769 of the other signals was missing. I have made the two cases consistent.
6771 3. The ignore_target_hosts setting on a manualroute router was being ignored
6772 for hosts that were looked up using the /MX notation.
6774 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6777 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6778 operated on the sender address. After changing the $sender_address to <>
6779 for the sender address verify, Exim was re-instated it as the original
6780 (before rewriting) address, but remembering that it had rewritten it, so it
6781 wasn't rewriting it again. This bug also had the effect of breaking the
6782 sender address verification caching when the sender address was rewritten.
6784 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6785 This has been changed so that if the ip literal address matches
6786 ignore_target_hosts, the router declines.
6788 7. Added expansion conditions match_domain, match_address, and match_local_
6789 part (NOT match_host).
6791 8. The placeholder for the Received: header didn't have a length field set.
6793 9. Added code to Exim itself and to exim_lock to test for a specific race
6794 condition that could lead to file corruption when using MBX delivery. The
6795 issue is with the lockfile that is created in /tmp. If this file is removed
6796 after a process has opened it but before that process has acquired a lock,
6797 there is the potential for a second process to recreate the file and also
6798 acquire a lock. This could lead to two Exim processes writing to the file
6799 at the same time. The added code performs the same test as UW imapd; it
6800 checks after acquiring the lock that its file descriptor still refers to
6801 the same named file.
6803 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6804 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6807 11. Added the smtp_active_hostname option. If used, this will typically be made
6808 to depend on the incoming interface address. Because $interface_address is
6809 not set up until the daemon has forked a reception process, error responses
6810 that can happen earlier (such as "too many connections") no longer contain
6813 12. If an expansion in a condition on a "warn" statement fails because a lookup
6814 defers, the "warn" statement is abandoned, and the next ACL statement is
6815 processed. Previously this caused the whole ACL to be aborted.
6817 13. Added the iplsearch lookup type.
6819 14. Added ident_timeout as a log selector.
6821 15. Added tls_certificate_verified as a log selector.
6823 16. Added a global option tls_require_ciphers (compare the smtp transport
6824 option of the same name). This controls incoming TLS connections.
6826 17. I finally figured out how to make tls_require_ciphers do a similar thing
6827 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6828 before starting the TLS session.
6830 18. Tabs are now shown as \t in -bP output.
6832 19. If the log selector return_path_on_delivery was set, Exim crashed when
6833 bouncing a message because it had too many Received: header lines.
6835 20. If two routers both had headers_remove settings, and the first one included
6836 a superfluous trailing colon, the final name in the first list and the
6837 first name in the second list were incorrectly joined into one item (with a
6838 colon in the middle).
6844 1. Added -C and -D options to the exinext utility, mainly to make it easier
6845 to include in the automated testing, but these could be helpful when
6846 multiple configurations are in use.
6848 2. The exinext utility was not formatting the output nicely when there was
6849 an alternate port involved in the retry record key, nor when there was a
6850 message id as well (for retries that were specific to a specific message
6851 and a specific host). It was also confused by IPv6 addresses, because of
6852 the additional colons they contain. I have fixed the IPv4 problem, and
6853 patched it up to do a reasonable job for IPv6.
6855 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6856 delivery, the log line now contains "pipelined" if PIPELINING was used.
6858 4. An SMTP transport process used to panic and die if the bind() call to set
6859 an explicit outgoing interface failed. This has been changed; it is now
6860 treated in the same way as a connect() failure.
6862 5. A reference to $sender_host_name in the part of a conditional expansion
6863 that was being skipped was still causing a DNS lookup. This no longer
6866 6. The def: expansion condition was not recognizing references to header lines
6867 that used bh_ and bheader_.
6869 7. Added the _cache feature to named lists.
6871 8. The code for checking quota_filecount in the appendfile transport was
6872 allowing one more file than it should have been.
6874 9. For compatibility with Sendmail, the command line option
6882 and sets the incoming protocol and host name (for trusted callers). The
6883 host name and its colon can be omitted when only the protocol is to be set.
6884 Note the Exim already has two private options, -pd and -ps, that refer to
6885 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6886 "s", but I don't think that's a major issue.
6888 10. A number of refactoring changes to the code, none of which should affect
6891 (a) The number of logging options was getting close to filling up the
6892 32-bit word that was used as a bit map. I have split them into two classes:
6893 those that are passed in the argument to log_write(), and those that are
6894 only ever tested independently outside of that function. These are now in
6895 separate 32-bit words, so there is plenty of room for expansion again.
6896 There is no change in the user interface or the logging behaviour.
6898 (b) When building, for example, log lines, the code previously used a
6899 macro that called string_cat() twice, in order to add two strings. This is
6900 not really sufficiently general. Furthermore, there was one instance where
6901 it was actually wrong because one of the argument was used twice, and in
6902 one call a function was used. (As it happened, calling the function twice
6903 did not affect the overall behaviour.) The macro has been replaced by a
6904 function that can join an arbitrary number of extra strings onto a growing
6907 (c) The code for expansion conditions now uses a table and a binary chop
6908 instead of a serial search (which was left over from when there were very
6909 few conditions). Also, it now recognizes conditions like "pam" even when
6910 the relevant support is not compiled in: a suitably worded error message is
6911 given if an attempt is made to use such a condition.
6913 11. Added ${time_interval:xxxxx}.
6915 12. A bug was causing one of the ddress fields not to be passed back correctly
6916 from remote delivery subprocesses. The field in question was not being
6917 subsequently used, so this caused to problems in practice.
6919 13. Added new log selectors queue_time and deliver_time.
6921 14. Might have fixed a bug in maildirsizefile handling that threw up
6922 "unexpected character" debug warnings, and recalculated the data
6923 unnecessarily. In any case, I expanded the warning message to give more
6926 15. Added the message "Restricted characters in address" to the statements in
6927 the default ACL that block characters like @ and % in local parts.
6929 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6930 Three changes have been made:
6932 (a) There was a serious bug; a negative response to MAIL caused the whole
6933 recipient domain to be cached as invalid, thereby blocking all messages
6934 to all local parts at the same domain, from all senders. This bug has
6935 been fixed. The domain is no longer cached after a negative response to
6936 MAIL if the sender used is not empty.
6938 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6941 (c) A new callout option, "use_sender" has been added for people who want
6942 the modified behaviour.
6948 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6951 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6952 indeed breaks things for older releases.
6954 3. Added additional logging to the case where there is a problem reading data
6955 from a filter that is running in a subprocess using a pipe, in order to
6956 try to track down a specific problem.
6958 4. Testing facility fudge: when running in the test harness and attempting
6959 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6960 getting "No route to host". Convert this to a timeout.
6962 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6965 6. Some OS don't have socklen_t but use size_t instead. This affects the
6966 fifth argument of getsockopt() amongst other things. This is now
6967 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6968 can be set for individual OS. I have set it for SunOS5, OSF1, and
6969 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6970 some earlier ones do not.
6972 7. Change 4.30/15 was not doing the test caselessly.
6974 8. The standard form for an IPv6 address literal was being rejected by address
6975 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6976 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6977 this, as well as the form without the "IPv6" on the front (but only when
6978 address literals are enabled, of course).
6980 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6982 10. Exim crashed if a message with an empty sender address specified by -f
6983 encountered a router with an errors_to setting. This could be provoked only
6984 by a command such as
6988 where an empty string was supplied; "<>" did not hit this bug.
6990 11. Installed PCRE release 4.5.
6992 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6993 remained set. It is now erased.
6995 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6996 times from message ids (which are base 36 rather than the normal 62).
6998 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6999 were being counted as actual protocol errors, and logged if the log
7000 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7001 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7002 and DATA following a set of rejected RCPTs do not count as protocol errors.
7003 In other words, Exim assumes they were pipelined, though this may not
7004 actually be the case. Of course, in all cases the client gets an
7005 appropriate error code.
7007 15. If a lookup fails in an ACL condition, a message about the failure may
7008 be available; it is used if testing the ACL cannot continue, because most
7009 such messages specify what the cause of the deferral is. However, some
7010 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7011 that caused an old message to be retained and used if a later statement
7012 caused a defer, replacing the real cause of the deferral.
7014 16. If an IP address had so many PTR records that the DNS lookup buffer
7015 was not large enough to hold them, Exim could crash while trying to process
7016 the truncated data. It now detects and logs this case.
7018 17. Further to 4.21/58, another change has been made: if (and only if) the
7019 first line of a message (the first header line) ends with CRLF, a bare LF
7020 in a subsequent header line has a space inserted after it, so as not to
7021 terminate the header.
7023 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7024 unnecessarily, used atoi() instead of strtol(), and didn't check the
7025 termination when getting file sizes from file names by regex.
7027 19. Completely re-implemented the support for maildirsize files, in the light
7028 of a number of problems with the previous contributed implementation
7029 (4.30/29). In particular:
7031 . If the quota is zero, the maildirsize file is maintained, but no quota is
7034 . If the maildir directory does not exist, it is created before any attempt
7035 to write a maildirsize file.
7037 . The quota value in the file is just a cache; if the quota is changed in
7038 the transport, the new value overrides.
7040 . A regular expression is available for excluding directories from the
7043 20. The autoreply transport checks the characters in options that define the
7044 message's headers; it allows continued headers, but it was checking with
7045 isspace() after an embedded newline instead of explicitly looking for a
7048 21. If all the "regular" hosts to which an address was routed had passed their
7049 expiry times, and had not reached their retry times, the address was
7050 bounced, even if fallback hosts were defined. Now Exim should go on to try
7053 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7054 equivalent code in the SMTP transport. Some hosts send humungous responses
7055 to HELO/EHLO, more than 1024 it seems.
7057 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7058 gives compiler warnings in some environments. I've now done it "properly",
7061 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7062 (because of problems with the built-in one) was declared to return uschar *
7063 instead of char *, causing compiler failure.
7065 25. Fixed a file descriptor leak when processing alias/forward files.
7067 26. Fixed a minor format string issue in dbfn.c.
7069 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7071 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7072 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7075 29. When a sender address is verified, it is cached, to save repeating the test
7076 when there is more than one recipient in a message. However, when the
7077 verification involves a callout, it is possible for different callout
7078 options to be set for different recipients. It is too complicated to keep
7079 track of this in the cache, so now Exim always runs a verification when a
7080 callout is required, relying on the callout cache for the optimization.
7081 The overhead is duplication of the address routing, but this should not be
7084 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7085 to be verified with callout=postmaster, and the main callout worked but the
7086 postmaster check failed, the verification correctly failed. However, if a
7087 subsequent RCPT command asked for sender verification *without* the
7088 postmaster check, incorrect caching caused this verification also to fail,
7091 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7092 it was not caching the DNS options (qualify_single, search_parents) that
7093 were used when the lookup failed. A subsequent lookup with different
7094 options therefore always gave the same answer, though there were cases
7095 where it should not have. (Example: a "domains = !$mx_any" option on a
7096 dnslookup router: the "domains" option is always processed without any
7097 widening, but the router might have qualify_single set.) Now Exim uses the
7098 cached value only when the same options are set.
7100 32. Added John Jetmore's "exipick" utility to the distribution.
7102 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7103 than a timeout (e.g. a certificate is required, and is not provided), an
7104 Exim server now closes the connection immediately. Previously it waited for
7105 the client to close - but if the client is SSL, it seems that they each
7106 wait for each other, leading to a delay before one of them times out.
7108 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7109 maintained 0.8.x compatibility because I don't think many are using it, and
7110 it is clearly obsolete.
7112 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7115 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7116 client certificate was expired. A simple patch fixes this, though I don't
7117 understand the full logic of why the verify callback is called multiple
7120 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7121 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7122 which causes problems with some clients (such as the Certicom SSL Plus
7123 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7124 disables the coutermeasure allowing Eudora to connect."
7126 38. Exim was not checking that a write() to a log file succeeded. This could
7127 lead to Bad Things if a log got too big, in particular if it hit a file
7128 size limit. Exim now panics and dies if it cannot write to a log file, just
7129 as it does if it cannot open a log file.
7131 39. Modified OS/Makefile-Linux so that it now contains
7133 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7135 The two -D definitions ensure that Exim is compiled with large file
7136 support, which makes it possible to handle log files that are bigger than
7139 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7140 instance) a domain was checked against a named list that involved a lookup,
7141 causing $domain_data to be set, then another domain was checked against the
7142 same list, then the first domain was re-checked, the value of $domain_data
7143 after the final check could be wrong. In particular, if the second check
7144 failed, it could be set empty. This bug probably also applied to
7147 41. The strip_trailing_dot option was not being applied to the address given
7148 with the -f command-line option.
7150 42. The code for reading a message's header from the spool was incrementing
7151 $received_count, but never initializing it. This meant that the value was
7152 incorrect (doubled) while delivering a message in the same process in which
7153 it was received. In the most common configuration of Exim, this never
7154 happens - a fresh exec is done - but it can happen when
7155 deliver_drop_privilege is set.
7157 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7158 it now includes up to 150 characters of the unexpected data in the log
7161 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7162 and building data strings. The size of both of these buffers was 10 000
7163 bytes - far larger than anybody would *ever* want, thought I. Needless to
7164 say, somebody hit the limit. I have increased the maximum line length to
7165 20 000 and the maximum data length of concatenated lines to 100 000. I have
7166 also fixed two bugs, because there was no checking on these buffers. Tsk,
7167 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7168 buffer is too small.
7170 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7171 lsearch lookups. Now it does.
7173 46. When parsing a route_list item in a manualroute router, a fixed-length
7174 buffer was used for the list of hosts. I made this 1024 bytes long,
7175 thinking that nobody would ever have a list of hosts that long. Wrong.
7176 Somebody had a whole pile of complicated expansion conditions, and the
7177 string was silently truncated, leading to an expansion error. It turns out
7178 that it is easier to change to an unlimited length (owing to other changes
7179 that have happened since this code was originally written) than to build
7180 structure for giving a limitation error. The length of the item that
7181 expands into the list of hosts is now unlimited.
7183 47. The lsearch lookup could not handle data where the length of text line was
7184 more than 4095 characters. Such lines were truncated, leading to shortened
7185 data being returned. It should now handle lines of any length.
7187 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7188 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7191 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7192 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7193 no longer happens in comment lines. A list of replacements is now placed
7194 at the head of all of the source files, except those whose only change is
7195 to replace PERL_COMMAND in the very first #! line.
7197 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7198 messages on the queue, with a bottom-up merge sort, using code contributed
7199 by Michael Haardt. This should make operations like -bp somewhat faster on
7200 large queues. It won't affect queue runners, except when queue_run_in_order
7203 51. Installed eximstats 1.31 in the distribution.
7205 52. Added support for SRV lookups to the dnslookup router.
7207 53. If an ACL referred to $message_body or $message_body_end, the value was not
7208 reset for any messages that followed in the same SMTP session.
7210 54. The store-handling optimization for building very long strings was not
7211 differentiating between the different store pools. I don't think this
7212 actually made any difference in practice, but I've tidied it.
7214 55. While running the routers to verify a sender address, $sender_address
7215 was still set to the sender address. This is wrong, because when routing to
7216 send a bounce to the sender, it would be empty. Therefore, I have changed
7217 it so that, while verifying a sender address, $sender_address is set to <>.
7218 (There is no change to what happens when verifying a recipient address.)
7220 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7221 target A or AAAA records (if not already returned) without resetting the
7222 qualify_single or search_parents options of the DNS resolver. These are
7223 inappropriate in this case because the targets of MX and SRV records must
7224 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7225 target that, when qualified, matched something in the local domain. These
7226 two options are now turned off when doing these lookups.
7228 57. It seems that at least some releases of Reiserfs (which does not have the
7229 concept of a fixed number of inodes) returns zero and not -1 for the
7230 number of available inodes. This interacted badly with check_spool_inodes,
7231 which assumed that -1 was the "no such thing" setting. What I have done is
7232 to check that the total number of inodes is greater than zero before doing
7233 the test of how many are available.
7235 58. When a "warn" ACL statement has a log_message modifier, the message is
7236 remembered, and not repeated. This is to avoid a lot of repetition when a
7237 message has many recipients that cause the same warning to be written.
7238 However, Exim was preserving the list of already written lines for an
7239 entire SMTP session, which doesn't seem right. The memory is now reset if a
7240 new message is started.
7242 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7243 debugging output unless log_rewrite was also set.
7245 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7246 of (int)(handle) when we know that handle contains (void *)(-1).
7248 61. The Exim daemon panic-logs an error return when it closes the incoming
7249 connection. However "connection reset by peer" seems to be common, and
7250 isn't really an error worthy of noting specially, so that particular error
7253 62. When Exim is trying to find all the local interfaces, it used to panic and
7254 die if the ioctl to get the interface flags failed. However, it seems that
7255 on at least one OS (Solaris 9) it is possible to have an interface that is
7256 included in the list of interfaces, but for which you get a failure error
7257 for this call. This happens when the interface is not "plumbed" into a
7258 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7259 failure of the "get flags" call assumes that the interface is down.
7261 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7262 makes life easier for people who are doing arithmetic on fields extracted
7263 from dates, where you often get leading zeros that should not be
7264 interpreted as octal.
7266 64. Added qualify_domain to the redirect router, to override the global
7269 65. If a pathologically long header line contained very many addresses (the
7270 report of this problem mentioned 10 000) and each of them was rewritten,
7271 Exim could use up a very large amount of memory. (It kept on making new
7272 copies of the header line as it rewrote, and never released the old ones.)
7273 At the expense of a bit more processing, the header rewriting function has
7274 been changed so that it no longer eats memory in this way.
7276 66. The generation of the Received: header has been moved from the time that a
7277 message starts to be received, to the time that it finishes. The timestamp
7278 in the Received: header should now be very close to that of the <= log
7279 line. There are two side-effects of this change:
7281 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7282 logged header lines no longer include the local Received: line, because
7283 it has not yet been created. The same applies to a copy of the message
7284 that is returned to a non-SMTP sender when a message is rejected.
7286 (b) When a filter file is tested using -bf, no additional Received: header
7287 is added to the test message. After some thought, I decided that this
7290 This change does not affect the value of $received_for. It is still set
7291 after address rewriting, but before local_scan() is called.
7293 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7295 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7296 gave an unhelpful panic error message, and a defer error. I have managed to
7297 change this behaviour so that it now rejects any supplied certificate,
7298 which seems right, as the list of acceptable certificates is empty.
7300 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7301 gave an unhelpful defer error. I have not managed to make this reject any
7302 supplied certificates, but the error message it gives is "no certificate
7303 supplied", which is not helpful.
7305 70. exigrep's output now also includes lines that are not associated with any
7306 message, but which match the given pattern. Implemented by a patch from
7307 Martin Sluka, which also tidied up the Perl a bit.
7309 71. Recipient callout verification, like sender verification, was using <> in
7310 the MAIL FROM command. This isn't really the right thing, since the actual
7311 sender may affect whether the remote host accepts the recipient or not. I
7312 have changed it to use the actual sender in the callout; this means that
7313 the cache record is now keyed on a recipient/sender pair, not just the
7314 recipient address. There doesn't seem to be a real danger of callout loops,
7315 since a callout by the remote host to check the sender would use <>.
7316 [SEE ABOVE: changed after hitting problems.]
7318 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7319 temporary errors. However, in the case of such a code being given after
7320 the end of a data transmission (i.e. after ".") Exim was failing to write
7321 a retry record for the message. (Yes, there was some broken host that was
7322 actually sending 8xx at this point.)
7324 73. An unknown lookup type in a host list could cause Exim to panic-die when
7325 the list was checked. (An example that provoked this was putting <; in the
7326 middle of a list instead of at the start.) If this happened during a DATA
7327 ACL check, a -D file could be left lying around. This kind of configuration
7328 error no longer causes Exim to die; instead it causes a defer error. The
7329 incident is still logged to the main and panic logs.
7331 74. Buglet left over from Exim 3 conversion. The message "too many messages
7332 in one connection" was written to the rejectlog but not the mainlog, except
7333 when address rewriting (yes!) was being logged.
7335 75. Added write_rejectlog option.
7337 76. When a system filter was run not as root (that is, when system_filter_user
7338 was set), the values of the $n variables were not being returned to the
7339 main process; thus, they were not subsequently available in the $sn
7342 77. Added +return_path_on_delivery log selector.
7344 78. A connection timeout was being treated differently from recipients deferred
7345 when testing hosts_max_try with a message that was older than the host's
7346 retry timeout. (The host should not be counted, thus allowing all hosts to
7347 be tried at least once before bouncing.) This may have been the cause of an
7348 occasionally reported bug whereby a message would remain on the queue
7349 longer than the retry timeout, but would be bounced if a delivery was
7350 forced. I say "may" because I never totally pinned down the problem;
7351 setting up timeout/retry tests is difficult. See also the next item.
7353 79. The ultimate address timeout was not being applied to errors that involved
7354 a combination of host plus message (for example, a timeout on a MAIL
7355 command). When an address resolved to a number of possible hosts, and they
7356 were not all tried for each delivery (e.g. because of hosts_max_try), a
7357 message could remain on the queue longer than the retry timeout.
7359 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7362 81. Fixed an obscure SMTP outgoing bug which required at least the following
7363 conditions: (a) there was another message waiting for the same server;
7364 (b) the server returned 5xx to all RCPT commands in the first message so
7365 that the message was not completed; (c) the server dropped the connection
7366 or gave a negative response to the RSET that Exim sends to abort the
7367 transaction. The observed case was a dropped connection after DATA that had
7368 been sent in pipelining mode. That is, the server had advertised PIPELINING
7369 but was not implementing it correctly. The effect of the bug was incorrect
7370 behaviour, such as trying another host, and this could lead to a crash.
7376 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7377 and daemon.c were passed as pointers to ints; they should have been
7378 pointers to socklen_t variables (which are typically unsigned ints).
7380 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7383 3. Fixed a really odd bug that affected only the testing scheme; patching a
7384 certain fixed string in the binary changed the value of another string that
7385 happened to be identical to the end of the original first string.
7387 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7388 name", it returns that address as the IP address. On some operating
7389 systems (e.g. Solaris), it also passes back the IP address string as the
7390 "host name". However, on others (e.g. Linux), it passes back an empty
7391 string. Exim wasn't checking for this, and was changing the host name to an
7392 empty string, assuming it had been canonicalized.
7394 5. Although rare, it is permitted to have more than one PTR record for a given
7395 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7396 all the names associated with an address, because they do in Solaris.
7397 However, it seems that they do not in Linux for data that comes from the
7398 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7399 I found this out when I moved to a new Linux workstation and tried to run
7400 the Exim test suite.
7402 To get round this problem I have changed the code so that it now does its
7403 own call to the DNS to look up PTR records when searching for a host name.
7404 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7405 addresses that are only in /etc/hosts are still found.
7407 This behaviour is, however, controlled by an option called host_lookup_
7408 order, which defaults to "bydns:byaddr". If people want to use the other
7409 order, or indeed, just use one or the other means of lookup, they can
7410 specify it in this variable.
7412 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7413 some operating systems, this comes back from gethostbyaddr() as an empty
7414 string, and this is what Exim used to test for. However, it seems that in
7415 other systems, "." is yielded. Exim now tests for this case too.
7417 7. The values of check_spool_space and check_log_space are now held internally
7418 as a number of kilobytes instead of an absolute number of bytes. If a
7419 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7420 kilobyte. This means that much larger values can be stored.
7422 8. Exim monitor: an attempt to get the action menu when not actually pointing
7423 at a message produces an empty menu entitled "No message selected". This
7424 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7425 no entries in it ("Shell widget menu has zero width and/or height"). So I
7426 have added a single, blank menu entry in this case.
7428 9. Added ${quote_local_part.
7430 10. MIME decoding is now applied to the contents of Subject: header lines when
7433 11. Now that a reference to $sender_host_address automatically causes a reverse
7434 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7435 host lookup before query-style lookups in lists that might use this
7436 variable. This has therefore been abolished, and the "net-" prefix is no
7437 longer necessary for query-style lookups.
7439 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7440 have been a typo for LFLAGS, so it has been changed.
7442 13. The install script calls Exim with "-C /dev/null" in order to find the
7443 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7444 to be output. However, since Exim outputs its version number before the
7445 error, it didn't break the script. It just looked ugly. I fixed this by
7446 always allowing "-C /dev/null" if the caller is root.
7448 14. Ignore overlarge ACL variable number when reading spool file - insurance
7449 against a later release with more variables having written the file.
7451 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7452 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7453 this, as well as the form without the "IPv6" on the front.
7455 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7456 OS/Makefile-Darwin file.
7458 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7459 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7461 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7462 variable. However, some OS use ints for inodes. I've added cast to long int
7463 to get rid of the compiler warning.
7465 19. I had forgotten to lock out "/../" in configuration file names when
7466 ALT_CONFIG_PREFIX was set.
7468 20. Routers used for verification do not need to specify transports. However,
7469 if such a router generated a host list, and callout was configured, Exim
7470 crashed, because it could not find a port number from the (non-existent)
7471 transport. It now assumes port 25 in this circumstance.
7473 21. Added the -t option to exigrep.
7475 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7476 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7477 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7478 them is set, LOOKUP_LSEARCH is forced.
7480 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7482 24. Added sender and host information to the "rejected by local_scan()" log
7483 line; previously there was no indication of these.
7485 25. Added .include_if_exists.
7487 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7488 Linux. It turns out that not all file systems support this. Apparently some
7489 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7490 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7491 not supported on the file descriptor, is now ignored when Exim is trying to
7492 sync a directory. This applies only to Linux.
7494 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7496 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7497 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7500 29. Added support for maildirsize files from supplied patch (modified a bit).
7502 30. The use of :fail: followed by an empty string could lead Exim to respond to
7503 sender verification failures with (e.g.):
7505 550 Verification failed for <xxx>
7506 550 Sender verify failed
7508 where the first response line was missing the '-' that indicates it is not
7509 the final line of the response.
7511 31. The loop for finding the name of the user that called Exim had a hardwired
7512 limit of 10; it now uses the value of finduser_retries, which is used for
7513 all other user lookups.
7515 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7518 33. Exim was neglecting to zero errno before one call of strtol() when
7519 expanding a string and expecting an integer value. On some systems this
7520 resulted in spurious "integer overflow" errors. Also, it was casting the
7521 result into an int without checking.
7523 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7524 did not work. The code looks as if it has *never* worked, though it appears
7525 to have been documented since at least release 1.62. I have made it work.
7527 35. The "timeout_DNS" error in retry rules, also documented since at least
7528 1.62, also never worked. As it isn't clear exactly what this means, and
7529 clearly it isn't a major issue, I have abolished the feature by treating it
7530 as "timeout", and writing a warning to the main and panic logs.
7532 36. The display of retry rules for -brt wasn't always showing the error code
7535 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7536 timeout_connect_A, timeout_connect_MX.
7538 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7539 to the empty sender.
7541 39. The daemon was not analysing the content of -oX till after it had closed
7542 stderr and disconnected from the controlling terminal. This meant that any
7543 syntax errors were only noted on the panic log, and the return code from
7544 the command was 0. By re-arranging the code a little, I've made the
7545 decoding happen first, so such errors now appear on stderr, and the return
7546 code is 1. However, the actual setting up of the sockets still happens in
7547 the disconnected process, so errors there are still only recorded on the
7550 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7551 connections (as happens on some IP stacks) was logged at start up time as
7552 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7553 it from "IPv6 and IPv4", which means that two separate sockets are being
7556 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7557 says whether AF_INET or AF_INET6 was passed as an argument.
7559 42. Exiwhat output was messed up when time zones were included in log
7562 43. Exiwhat now gives more information about the daemon's listening ports,
7563 and whether -tls-on-connect was used.
7565 44. The "port" option of the smtp transport is now expanded.
7567 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7568 silently ignored. Now an error message is written to the main and panic
7571 46. There's a new ACL modifier called "logwrite" which writes to a log file
7572 as soon as it is encountered.
7574 47. Added $local_user_uid and $local_user_gid at routing time.
7576 48. Exim crashed when trying to verify a sender address that was being
7579 49. Exim was recognizing only a space character after ".include". It now also
7580 recognizes a tab character.
7582 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7583 extracting the relevant information from the specification. The man page no
7584 longer contains scrambled data for the -d option, and I've added a section
7585 at the front about calling Exim under different names.
7587 51. Added "extra_headers" argument to the "mail" command in filter files.
7589 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7592 53. Installed eximstats 1.29.
7594 54. Added transport_filter_timeout as a generic transport option.
7596 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7597 Cc: header lines. This was required by RFC 822, but it not required by RFC
7600 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7601 incoming messages that did not have them. Now it does so only if the
7602 message originates locally, that is, if there is no associated remote host
7603 address. When Resent- header lines are present, this applies to the Resent-
7604 lines rather than the non-Resent- lines.
7606 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7607 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7609 58. Messages for configuration errors now include the name of the main
7610 configuration file - useful now that there may be more than one file in a
7611 list (.included file names were always shown).
7613 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7614 for those rare installations that do not start the daemon as root or run it
7615 setuid root. I've cut out the call to initgroups() if the daemon is not
7618 60. The Exim user and group can now be bound into the binary as text strings
7619 that are looked up at the start of Exim's processing.
7621 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7623 62. Added $mailstore_basename variable.
7625 63. Installed patch to sieve.c from Michael Haardt.
7627 64. When Exim failed to open the panic log after failing to open the main log,
7628 the original message it was trying to log was written to stderr and debug
7629 output, but if they were not available (the usual case in production), it
7630 was lost. Now it is written to syslog before the two lines that record the
7631 failures to open the logs.
7633 65. Users' Exim filters run in subprocesses under the user's uid. It is
7634 possible for a "deliver" command or an alias in a "personal" command to
7635 provoke an address rewrite. If logging of address rewriting is configured,
7636 this fails because the process is not running as root or exim. There may be
7637 a better way of dealing with this, but for the moment (because 4.30 needs
7638 to be released), I have disabled address rewrite logging when running a
7639 filter in a non-root, non-exim process.
7645 1. The buildconfig auxiliary program wasn't quoting the value set for
7646 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7647 not defined. This bug was masked in 4.22 by the effect that was fixed in
7650 2. Some messages that were rejected after a message id was allocated were
7651 shown as "incomplete" by exigrep. It no longer does this for messages that
7652 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7654 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7655 have allow_domain_literals set, the ID did not get logged in the <= line.
7656 Domain literals are now always recognized in Message-ID: header lines.
7658 4. The first argument for a ${extract expansion item is the key name or field
7659 number. Leading and trailing spaces in this item were not being ignored,
7660 causing some misleading effects.
7662 5. When deliver_drop_privilege was set, single queue runner processes started
7663 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7664 same command in the process it spins off) were not dropping privilege.
7666 6. When the daemon running as "exim" started a queue runner, it always
7667 re-executed Exim in the spun-off process. This is a waste of effort when
7668 deliver_drop_privilege is set. The new process now just calls the
7669 queue-runner function directly.
7675 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7678 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7679 ignored. Though the use of -oP was forcing the writing of a pid file, it
7680 was always written to the default place.
7682 3. If the message "no IP address found for host xxxx" is generated during
7683 incoming verification, it is now followed by identification of the incoming
7684 connection (so you can more easily find what provoked it).
7686 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7688 5. Added some features to "harden" Exim a bit more against certain attacks:
7690 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7691 be put in Local/Makefile. This is like the never_users runtime option,
7692 but it cannot be overridden. The default setting is "root".
7694 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7695 prefix string with which any file named in a -C command line option
7698 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7699 is retained for -C and -D only if the caller of Exim is root. Without
7700 it, the exim user may also use -C and -D and retain privilege.
7702 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7703 command line option is disabled.
7705 6. Macro names set by the -D option must start with an upper case letter, just
7706 like macro names defined in the configuration file.
7708 7. Added "dereference=" facility to LDAP.
7710 8. Two instances of the typo "uknown" in the source files are fixed.
7712 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7713 the Configure-Makefile script screwed up while processing it.
7715 10. Incorporated PCRE 4.4.
7717 11. The SMTP synchronization check was not operating right at the start of an
7718 SMTP session. For example, it could not catch a HELO sent before the client
7719 waited for the greeting. There is now a check for outstanding input at the
7720 point when the greeting is written. Because of the duplex, asynchronous
7721 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7722 way, but not yet received, when the check is performed.
7724 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7725 on TCP/IP sockets, because this apparently causes some broken clients to
7728 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7729 unchanged) from the Cygwin maintainer.
7731 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7732 was supported instead of testing for mbx. Effectively a typo.
7734 15. The spa authenticator server code was not checking that the input it
7735 received was valid base64.
7737 16. The debug output line for the "set" modifier in ACLs was not showing the
7738 name of the variable that was being set.
7740 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7742 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7743 lookup on its own. Something else was needed to trigger the lookup. For
7744 example, a match in host_lookup or the need for a host name in a host list.
7745 Now, if $sender_host_name is referenced and the host name has not yet been
7746 looked up, a lookup is performed. If the lookup fails, the variable remains
7747 empty, and $host_lookup_failed is set to "1".
7749 19. Added "eqi" as a case-independent comparison operator.
7751 20. The saslauthd authentication condition could segfault if neither service
7752 nor realm was specified.
7754 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7755 error message that was logged was misleading, and incoming SMTP
7756 connections were dropped. The message is now more accurate, and temporary
7757 errors are given to SMTP connections.
7759 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7760 (except RSET) with a 421 error, until QUIT is received. However, it was
7761 failing to send a response to QUIT.
7763 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7764 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7765 ACL is now run after the helo_try_verify_hosts code.
7767 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7768 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7769 case-independent, so other case variants are also recognized). Apparently
7770 some systems use these upper case variants.
7772 25. If more than two messages were waiting for the same host, and a transport
7773 filter was specified for the transport, Exim sent two messages over the
7774 same TCP/IP connection, and then failed with "socket operation on non-
7775 socket" when it tried to send the third.
7777 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7779 27. The extern definition of crypt16() in expand.c was not being excluded when
7780 the OS had its own crypt16() function.
7782 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7783 as a preferred synonym for return_size_limit, both as an option and as an
7786 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7788 30. Changed the default configuration ACL to relax the local part checking rule
7789 for addresses that are not in any local domains. For these addresses,
7790 slashes and pipe symbols are allowed within local parts, but the sequence
7791 /../ is explicitly forbidden.
7793 31. SPA server authentication was not clearing the challenge buffer before
7796 32. log_message in a "warn" ACL statement was writing to the reject log as
7797 well as to the main log, which contradicts the documentation and doesn't
7798 seem right (because no rejection is happening). So I have stopped it.
7800 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7801 However, I am unable to do any testing of this.
7803 34. Fixed an infelicity in the appendfile transport. When checking directories
7804 for a mailbox, to see if any needed to be created, it was accidentally
7805 using path names with one or more superfluous leading slashes; tracing
7806 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7808 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7809 contents are added to the log line that is written for every discarded
7810 recipient. (Previously a log_message setting was ignored.)
7812 36. The ${quote: operator now quotes the string if it is empty.
7814 37. The install script runs exim in order to find its version number. If for
7815 some reason other than non-existence or emptiness, which it checks, it
7816 could not run './exim', it was installing it with an empty version number,
7817 i.e. as "exim-". This error state is now caught, and the installation is
7820 38. An argument was missing from the function that creates an error message
7821 when Exim fails to connect to the socket for saslauthd authentication.
7822 This could cause Exim to crash, or give a corrupted message.
7824 39. Added isip, isip4, and isip6 to ${if conditions.
7826 40. The ACL variables $acl_xx are now saved with the message, and can be
7827 accessed later in routers, transports, and filters.
7829 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7830 strings in the file are not string-expanded.
7832 42. If a MAIL command specified a SIZE value that was too large to fit into an
7833 int variable, the check against message_size_limit failed. Such values are
7834 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7835 day this will have to be increased, but I don't think I want to be around
7836 when emails are that large.
7843 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7844 iconv() is not standard in FreeBSD.
7846 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7847 IPv6 enabled. The observed symptom was a segmentation fault on return from
7848 the function os_common_find_running_interfaces() in src/os.c.
7850 3. In the check_special_case() function in daemon.c I had used "errno" as an
7851 argument name, which causes warnings on some systems. This was basically a
7852 typo, since it was named "eno" in the comments!
7854 4. The code that waits for the clock to tick (at a resolution of some fraction
7855 of a second) so as to ensure message-id uniqueness was always waiting for
7856 at least one whole tick, when it could have waited for less. [This is
7857 almost certainly not relevant at current processor speeds, where it is
7858 unlikely to ever wait at all. But we try to future-proof.]
7860 5. The function that sleeps for a time interval that includes fractions of a
7861 second contained a race. It did not block SIGALRM between setting the
7862 timer, and suspending (a couple of lines later). If the interval was short
7863 and the sigsuspend() was delayed until after it had expired, the suspension
7864 never ended. On busy systems this could lead to processes getting stuck for
7867 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7868 process, before it forks any delivery processes. The open lookup caching
7869 mechanism meant that the open file or database connection was passed into
7870 the delivery process. The problem was that delivery processes always tidy
7871 up cached lookup data. This could cause a problem for the next delivery
7872 process started by the queue runner, because the external queue runner
7873 process does not know about the closure. So the next delivery process
7874 still has data in the lookup cache. In the case of a file lookup, there was
7875 no problem because closing a file descriptor in a subprocess doesn't affect
7876 the parent. However, if the lookup was caching a connection to a database,
7877 the connection was closed, and the second delivery process was likely to
7878 see errors such as "PGSQL: query failed: server closed the connection
7879 unexpectedly". The problem has been fixed by closing all cached lookups
7880 in a queue runner before running a delivery process.
7882 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7883 seem to have the "const" qualifier which it has on other OS. I've
7886 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7887 *of the same type* (client or server) with the same public name that an
7888 error should be diagnosed.
7890 9. When Exim looked up a host name for an IP address, but failed to find the
7891 original IP address when looking up the host name (a safety check), it
7892 output the message "<ip address> does not match any IP for NULL", which was
7893 confusing, to say the least. The bug was that the host name should have
7894 appeared instead of "NULL".
7896 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7897 user that is built into the binary, and the -C or -D options is used, root
7898 privilege is dropped before the configuration file is read. In addition,
7899 logging is switched to stderr instead of the normal log files. If the
7900 configuration then re-defines the Exim user, the unprivileged environment
7901 is probably not what is expected, so Exim logs a panic warning message (but
7904 However, if deliver_drop_privilege is set, the unprivileged state may well
7905 be exactly what is intended, so the warning has been cut out in that case,
7906 and Exim is allowed to try to write to its normal log files.
7912 1. smtp_return_error_details was not giving details for temporary sender
7913 or receiver verification errors.
7915 2. Diagnose a configuration error if two authenticators have the same public
7918 3. Exim used not to create the message log file for a message until the first
7919 delivery attempt. This could be confusing when incoming messages were held
7920 for policy or load reasons. The message log file is now created at the time
7921 the message is received, and an initial "Received" line is written to it.
7923 4. The automatically generated man page for command line options had a minor
7924 bug that caused no ill effects; however, a more serious problem was that
7925 the procedure for building the man page automatically didn't always
7926 operate. Consequently, release 4.20 contains an out-of-date version. This
7927 shouldn't happen again.
7929 5. When building Exim with embedded Perl support, the script that builds the
7930 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7931 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7933 6. The freeze_tell option was not being used for messages that were frozen on
7934 arrival, either by an ACL or by local_scan().
7936 7. Added the smtp_incomplete_transaction log selector.
7938 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7939 was accepting AUTH without a new EHLO.
7941 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7942 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7945 10. Logging of TCP/IP connections (when configured) now happens in the main
7946 daemon process instead of the child process, so that the TCP/IP connection
7947 count is more accurate (but it can never be perfect).
7949 11. The use of "drop" in a nested ACL was not being handled correctly in the
7950 outer ACL. Now, if condition failure induced by the nested "drop" causes
7951 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7952 or "require"), the connection is dropped.
7954 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7955 that yield "discard" can now be used with an "accept" or a "discard" verb,
7956 but an error is generated for any others (because I can't see a useful way
7957 to define what should happen).
7959 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7960 are now processed in the same way as lines in the Exim configuration file.
7961 In particular, continuation lines are supported.
7963 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7965 15. Added -ti meaning -t -i.
7967 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7968 domains, and warn by logging if others are found.
7970 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7971 returned from GIFCONF when Exim is trying to find the list of interfaces on
7972 a host. The code in os.c has been modified to copy each ifreq to an aligned
7973 structure in all cases.
7975 Also, in some cases, the returned ifreq's were being copied to a 'struct
7976 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7977 means the last couple of bytes of an IPv6 address could be chopped if the
7978 ifreq contained only a normal sockaddr (14 bytes storage).
7980 18. Named domain lists were not supported in the hosts_treat_as_local option.
7981 An entry such as +xxxx was not recognized, and was treated as a literal
7984 19. Ensure that header lines added by a DATA ACL are included in the reject log
7985 if the ACL subsequently rejects the message.
7987 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7988 MD5 (which is deprecated).
7990 21. When testing a filter file using -bf, Exim was writing a message when it
7991 took the sender from a "From " line in the message, but it was not doing so
7992 when it took $return_path from a Return-Path: header line. It now does.
7994 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7995 with a valid header line field name (a series of printing characters
7996 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7998 23. Changed "disc" in the source to "disk" to conform to the documentation and
7999 the book and for uniformity.
8001 24. Ignore Sendmail's -Ooption=value command line item.
8003 25. When execve() failed while trying to run a command in a pipe transport,
8004 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8005 could be confused with a return value of 69 from the command itself. This
8006 has been changed to 127, the value the shell returns if it is asked to run
8007 a non-existent command. The wording for the related log line suggests a
8008 non-existent command as the problem.
8010 26. If received_header_text expands to an empty string, do not add a Received:
8011 header line to the message. (Well, it adds a token one on the spool, but
8012 marks it "old" so that it doesn't get used or transmitted.)
8014 27. Installed eximstats 1.28 (addition of -nt option).
8016 28. There was no check for failure on the call to getsockname() in the daemon
8017 code. This can fail if there is a shortage of resources on the system, with
8018 ENOMEM, for example. A temporary error is now given on failure.
8020 29. Contrary to the C standard, it seems that in some environments, the
8021 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8022 program. Exim now does this explicitly; it affects the formatting of
8023 timestamps using strftime().
8025 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8026 complaints. I've now initialized all the variables, to avoid this.
8028 32. Header lines added by a system filter were not being "seen" during
8029 transport-time rewrites.
8031 33. The info_callback() function passed to OpenSSL is set up with type void
8032 (*)(SSL *, int, int), as described somewhere. However, when calling the
8033 function (actually a macro) that sets it up, the type void(*)() is
8034 expected. I've put in a cast to prevent warnings from picky compilers.
8036 34. If a DNS black list lookup found a CNAME record, but there were no A
8037 records associated with the domain it pointed at, Exim crashed.
8039 35. If a DNS black list lookup returned more than one A record, Exim ignored
8040 all but the first. It now scans all returned addresses if a particular IP
8041 value is being sought. In this situation, the contents of the
8042 $dnslist_value variable are a list of all the addresses, separated by a
8045 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8046 to accept a host name and all its aliases if the forward lookup for any of
8047 them yielded the IP address of the incoming connection. Now it accepts only
8048 those names whose forward lookup yields the correct IP address. Any other
8049 names are discarded. This closes a loophole whereby a rogue DNS
8050 administrator could create reverse DNS records to break through a
8051 wildcarded host restriction in an ACL.
8053 37. If a user filter or a system filter that ran in a subprocess used any of
8054 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8055 the wrong values were passed to the pipe command ($thisaddress had the
8056 value of $0, $0 had the value of $1, etc). This bug was introduced by
8057 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8059 38. Improved the line breaking for long SMTP error messages from ACLs.
8060 Previously, if there was no break point between 40 and 75 characters, Exim
8061 left the rest of the message alone. Two changes have been made: (a) I've
8062 reduced the minimum length to 35 characters; (b) if it can't find a break
8063 point between 35 and 75 characters, it looks ahead and uses the first one
8064 that it finds. This may give the occasional overlong line, but at least the
8065 remaining text gets split now.
8067 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8068 file descriptors might be low, and that setting 1000 would always raise it.
8069 It turns out that in some environments, the limit is already over 1000 and
8070 that lowering it causes trouble. So now Exim takes care not to decrease it.
8072 40. When delivering a message, the value of $return_path is set to $sender_
8073 address at the start of routing (routers may change the value). By an
8074 oversight, this default was not being set up when an address was tested by
8075 -bt or -bv, which affected the outcome if any router or filter referred to
8078 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8079 log only when "message" or "log_message" are set. However, if one of the
8080 conditions was an address verification, or a call to a nested ACL, the
8081 messages generated by the underlying test were being passed through. This
8082 no longer happens. The underlying message is available in $acl_verify_
8083 message for both "message" and "log_message" expansions, so it can be
8084 passed through if needed.
8086 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8087 new expansion $bh_ to give the encoded byte string without charset
8088 translation. Translation happens only if iconv() is available; HAVE_ICONV
8089 indicates this at build time. HEADERS_CHARSET gives the charset to
8090 translate to; headers_charset can change it in the configuration, and
8091 "headers charset" can change it in an individual filter file.
8093 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8094 that creates RFC 2047 encoded "words" labels them as that charset instead
8095 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8096 expansion operator; (ii) when Exim creates a From: line for a local
8097 message; (iii) when a header line is rewritten to include a "phrase" part.
8099 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8100 buggy, causing it to skip the first lines of messages whose message ID
8101 ended in 'D'. This would not have bitten before Exim release 4.14, because
8102 message IDs were unlikely to end in 'D' before then. The effect was to have
8103 incorrect size information for certain domains.
8105 45. #include "config.h" was missing at the start of the crypt16.c module. This
8106 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8109 46. If there was a timeout during a "random" callout check, Exim treated it as
8110 a failure of the random address, and carried on sending RSET and the real
8111 address. If the delay was just some slowness somewhere, the response to the
8112 original RCPT would be taken as a response to RSET and so on, causing
8113 mayhem of various kinds.
8115 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8116 when I implemented it. It didn't allow for the fact that some option values
8117 may legitimately be negative (e.g. size_addition), and it didn't even do
8118 the right test for positive values.
8120 48. Domain names in DNS records are case-independent. Exim always looks them up
8121 in lower case. Some resolvers return domain names in exactly the case they
8122 appear in the zone file, that is, they may contain uppercase letters. Not
8123 all resolvers do this - some return always lower case. Exim was treating a
8124 change of case by a resolver as a change of domain, similar to a widening
8125 of a domain abbreviation. This triggered its re-routing code and so it was
8126 trying to route what was effectively the same domain again. This normally
8127 caused routing to fail (because the router wouldn't handle the domain
8128 twice). Now Exim checks for this case specially, and just changes the
8129 casing of the domain that it ultimately uses when it transmits the message
8132 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8135 50. If a filter generated a file delivery with a non-absolute name (possible if
8136 no home directory exists for the router), the forbid_file option was not
8139 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8140 the existing equality matching.
8142 52. Exim was using ints instead of ino_t variables in some places where it was
8143 dealing with inode numbers.
8145 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8146 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8147 called TMPDIR, and if it finds it is different, it changes its value.
8149 54. The smtp_printf() function is now made available to local_scan() so
8150 additional output lines can be written before returning. There is also an
8151 smtp_fflush() function to enable the detection of a dropped connection.
8152 The variables smtp_input and smtp_batched_input are exported to
8155 55. Changed the default runtime configuration: the message "Unknown user"
8156 has been removed from the ACL, and instead placed on the localuser router,
8157 using the cannot_route_message feature. This means that any verification
8158 failures that generate their own messages won't get overridden. Similarly,
8159 the "Unrouteable address" message that was in the ACL for unverifiable
8160 relay addresses has also been removed.
8162 56. Added hosts_avoid_esmtp to the smtp transport.
8164 57. The exicyclog script was not checking for the esoteric option
8165 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8166 will work only if exicyclog is run under the appropriate euid.
8168 58. Following a discussion on the list, the rules by which Exim recognises line
8169 endings on incoming messages have been changed. The -dropcr and drop_cr
8170 options are now no-ops, retained only for backwards compatibility. The
8171 following line terminators are recognized: LF CRLF CR. However, special
8172 processing applies to CR:
8174 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8175 nor a local message in the state where . is a terminator.
8177 (ii) If a bare CR is encountered in a header line, an extra space is added
8178 after the line terminator so as not to end the header. The reasoning
8179 behind this is that bare CRs in header lines are most likely either
8180 to be mistakes, or people trying to play silly games.
8182 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8183 was being incorrectly given as 18 bytes larger than it should have been.
8184 This is a VOB (very old bug).
8186 60. This may never have affected anything current, but just in case it has:
8187 When the local host is found other than at the start of a list of hosts,
8188 the local host, those with the same MX, and any that follow, are discarded.
8189 When the list in question was part of a longer list of hosts, the following
8190 hosts (not currently being processed) were also being discarded. This no
8191 longer happens. I'm not sure if this situation could ever has previously
8194 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8197 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8198 header. This is something that is recommended in a new Internet Draft, and
8199 is something that is documented as being done by Sendmail. There are two
8200 possible values. For messages generated by the autoreply transport, Exim
8203 Auto-Submitted: auto-replied
8205 whereas for all other generated messages (e.g. bounces) it adds
8207 Auto-Submitted: auto-generated
8209 63. The "personal" condition in filters now includes a test for the
8210 Auto-Submitted: header. If it contains the string "auto-" the message it
8211 not considered personal.
8213 64. Added rcpt_include_affixes as a generic transport option.
8215 65. Added queue_only_override (default true).
8217 66. Added the syslog_duplication option.
8219 67. If what should have been the first header line of a message consisted of
8220 a space followed by a colon, Exim was mis-interpreting it as a header line.
8221 It isn't of course - it is syntactically invalid and should therefore be
8222 treated as the start of the message body. The misbehaviour could have
8223 caused a number of strange effects, including loss of data in subsequent
8224 header lines, and spool format errors.
8226 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8227 client host had authenticated. This control can now be exercised by an ACL
8228 for more flexibility.
8230 69. By default, callouts do not happen when testing with -bh. There is now a
8231 variant, -bhc, which does actually run the callout code, including
8232 consulting and updating the callout cache.
8234 70. Added support for saslauthd authentication, courtesy of Alexander
8237 71. If statvfs() failed on the spool or log directories while checking their
8238 size for availability, Exim confusingly gave the error "space shortage".
8239 Furthermore, in debugging mode it crashed with a floating point exception.
8240 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8241 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8242 serious problem, Exim now writes to the main and panic logs when this
8243 happens, with details of the failure. It then refuses to accept the
8244 incoming message, giving the message "spool directory problem" or "log
8245 directory problem" with a 421 code for SMTP messages.
8247 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8248 0, 1, and 2 exist, because some OS complain for execs without them (see
8249 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8250 descriptors. However, the code omitted to check that the open succeeded,
8251 causing mysterious errors if for some reason the permissions on /dev/null
8252 got screwed. Now Exim writes a message to the main and panic logs, and
8253 bombs out if it can't open /dev/null.
8255 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8256 interact so that it is all more flexible. It is supposed to remain
8257 backwards compatible. Also added extra_local_interfaces.
8259 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8260 to bomb out with an assertion failure - to the client this appears as a
8261 connection drop. This problem occurs in the part of the code that was taken
8262 from the Samba project. Fortunately, the assertion is in a very simple
8263 function, so I have fixed this by reproducing the function inline in the
8264 one place where it is called, and arranging for authentication to fail
8265 instead of killing the process with assert().
8267 75. The SPA client code was not working when the server requested OEM rather
8268 than Unicode encoding.
8270 76. Added code to make require_files with a specific uid setting more usable in
8271 the case where statting the file as root fails - usually a non-root-mounted
8272 NFS file system. When this happens and the failure is EACCES, Exim now
8273 forks a subprocess and does the per-uid checking as the relevant uid.
8275 77. Added process_log_path.
8277 78. If log_file_path was not explicitly set, a setting of check_log_space or
8278 check_log_inodes was ignored.
8280 79. If a space check for the spool or log partitions fails, the incident is now
8281 logged. Of course, in the latter case the data may get lost...
8283 80. Added the %p formatting code to string_format() so that it can be used to
8284 print addresses in debug_print(). Adjusted all the address printing in the
8285 debugging in store.c to use %p rather than %d.
8287 81. There was a concern that a line of code in smtp_in.c could overflow a
8288 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8289 initially expressed, the concern was not well-founded, because trailing
8290 spaces are removed early. However, if the trailing spaces were followed by
8291 a NULL, they did not get removed, so the overflow was possible. Two fixes
8294 (a) I re-wrote the offending code in a cleaner fashion.
8295 (b) If an incoming SMTP command contains a NULL character, it is rejected
8298 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8299 runs initgroups(), so that if the Exim user is in any additional groups,
8300 they will be used during message reception.
8306 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob