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 Move the wait-for-next-tick (needed for unique messmage IDs) from
9 after reception to before a subsequent reception. This should
10 mean slightly faster delivery, and also confirmation of reception
13 JH/02 Move from using the pcre library to pcre2. The former is no longer
14 being developed or supported (by the original developer).
16 JH/03 Constification work in the filters module required a major version
17 bump for the local-scan API. Specifically, the "headers_charset"
18 global which is visible via the API is now const and may therefore
19 not be modified by local-scan code.
21 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
22 sendfile() didi not account for the way the ClamAV driver code called it.
24 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
25 time check was being done for every character; replace that with one
28 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
29 sent was prefixed with a length byte.
31 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
32 RFC 5321. Previously Dovecot (at least) would log errors during
35 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
36 in 4.61 without a reason logged. Binaries will be bigger, which might
37 matter on diskspace-constrained systems, but debug is easier.
39 JH/09 Fix macro-definition during "-be" expansion testing. The move to
40 write-protected store for macros had not accounted for these runtime
41 additions; fix by removing this protection for "-be" mode.
43 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
44 handing out large-numbered file descriptors, violating the usual Unix
45 assumption (and required by Posix) that the lowest possible number will be
46 allocated by the kernel when a new one is needed. In the daemon, and any
47 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
48 are not useable for FD_SET() [and hence select()] and overwrite the stack.
49 Assorted crashes happen.
51 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
52 main-section options or in a connect ACL, the value from the first ever
53 connection was never replaced for subsequent connections. Found by
56 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
57 though only once PCRE2 was introduced: the memory accounting used under
58 debug offset allocations by an int, giving a hard trap in early startup.
59 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
61 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
62 with underbars is given. The write-protection of configuration introduced
63 in 4.95 trapped when normalisation was applied to an option not needing
66 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
68 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
69 failing to close the certificates directory, every hour or any time it
72 JH/16 Debugging initiated by an ACL control now continues through into routing
73 and transport processes, when delivery is immediate. Previously debugging
74 stopped any time Exim re-execs.
76 JH/17 The "expand" debug selector now gives more detail, specifically on the
77 result of expansion operators and items.
79 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
80 bad comparison between the option value and the name of the file to
81 be included was done, and a mismatch was wrongly identified.
82 4.88 to 4.95 are affected.
84 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
86 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
87 supplied as the db file-pair basename. Previously, if a directory
88 path was given, for example via the autoreply "once" option, the DB
89 file.pag and file.dir files would be created in that directory's
92 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
93 "taint" log_selector. These were previously deprecated.
95 JH/22 Fix static address-list lookups to properly return the matched item.
96 Previously only the domain part was returned.
98 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
99 the call into OpenSSL to send a TLS Close was being repeated; this
100 resulted in the library waiting for the peer's Close. If that was never
101 sent we waited forever. Fix by tracking send calls.
103 JH/24 The ${run} expansion item now expands its command string elements after
104 splitting. Previously it was before; the new ordering makes handling
105 zero-length arguments simpler. The old ordering can be obtained by
106 appending a new option "preexpand", after a comma, to the "run".
108 JH/25 Taint-check exec arguments for transport-initiated external processes.
109 Previously, tainted values could be used. This affects "pipe", "lmtp" and
110 "queryprogram" transport, transport-filter, and ETRN commands.
111 The ${run} expansion is also affected: in "preexpand" mode no part of
112 the command line may be tainted, in default mode the executable name
115 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
116 the the facility was not passed across execs, and only the first message
117 passed over a connection could use BDAT; any further ones using DATA.
119 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
120 uses $sending_ip_address and an interface is specified.
121 Previously any use of the local address in the EHLO name disabled
122 PIPECONNECT, the common case being to use the rDNS of it.
124 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
125 resumption. Previously verify failed because no certificate status is
126 passed on the wire for the restarted session. Fix by using the recorded
127 ocsp status of the stored session for the new connection.
133 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
134 related applications. Previously an "H" was used where available info
135 says that "M" should be, so change to match.
137 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
138 as arguments, so an implementation trying to copy these into a local
139 buffer was taking a taint-enforcement trap. Fix by using dynamically
140 created buffers. Similar fix for radius expansion condition.
142 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
143 reasonable, eg. to count headers. Fix by using dynamically created
144 buffers rather than a local. Do similar fixes for ACL actions "dcc",
145 "log_reject_target", "malware" and "spam"; the arguments are expanded
146 so could be handling tainted values.
148 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
149 broken the (no-op) support for this sendmail command. Restore it
150 to doing nothing, silently, and returning good status.
152 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
153 record path was given (or the default used) without a leading directory
154 path, an error occurred on trying to open it. Use the transport's working
157 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
158 transport. Previously it was the name on the DNS A-record; use instead
159 the head of the CNAME chain leading there (if there is one). This seems
160 to align better with RFC 6125.
162 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
163 smtp_accept_max_per_host allocated resources which were not released
164 when the limit was exceeded. This eventually crashed the daemon. Fix
165 by adding a release action in that path.
167 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
168 expanded; previously using tainted values was rejected. Fix by using
169 dynamically-created buffers.
171 JH/09 Relax restrictions on ACL verify condition needing access to message
172 headers. Previously they were only permitted in data and non-smtp ACLs;
173 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
174 not_blind, header_sender and header_names_ascii verification.
176 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
177 Previously a macro used one argument twice; when called with the
178 argument as an expression having side-effects, incorrect operation
179 resulted. Use an inlineable function.
181 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
182 held open for a verify callout. Previously this wan not accounted for
183 and a corrupt onward SMTP conversation resulted.
185 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
186 Previously they were embedded naively in the constructed address; when
187 needed, strip the quoting and quote the entire local_part.
188 Also make the inbound_srs expansion condition handle quoting.
190 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
191 excluded, not matching the documentation.
193 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
194 was given for the sqlite_dbfile a trap resulted.
196 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
197 "name" argument resulted in a trap. There is no reason to disallow such;
198 this was a coding error.
200 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
201 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
202 spent suspended, ignoring the POSIX definition. Previously we assumed
203 it did and a constant offset from real time could be used as a correction.
204 Change to using the same clock source for the start-of-message and the
205 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
206 exists, just to get a clock slightly more aligned to reality.
208 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
209 RFC says it is optional some validators care. The missing char was not
210 intended but triggered by a line-wrap alignment. Discovery and fix by
211 Guillaume Outters, hacked on by JH.
213 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
214 name being quoted was tainted a trap would be taken. Fix by using
215 dynamically created buffers. The routine could have been called by a
216 rewrite with the "h" flag, by using the "-F" command-line option, or
217 by using a "name=" option on a control=submission ACL modifier.
219 JH/19 SPF: change the Authentication-Results expansion component to give
220 smtp.helo when the sender domain is empty. Previously it gave
223 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
224 not in 127.0.0.0/8 to help in spotting list domains taken over by a
225 domain-parking registrar.
227 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
228 Previously when a whitespace character was specified it was not inserted
229 after removing the newline.
231 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
232 the domain part of the recipient address. This overrides any tls_sni
233 option set, which was previously used.
235 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
238 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
239 is_tainted() had an off-by-one error in the overenthusiastic direction.
240 Find and fix by Gavan. Although NetBSD is not a supported platform for
241 4.94 this bug could affect other platforms.
243 PP/01 Fix default prime selection to be consistent.
244 One path used ike23 still, instead of exim.dev.20160529.3; now both
245 execution flows will use the same DH primes (currently
246 exim.dev.20160529.3).
248 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
249 option in smtp transport, to match the documentation. Previously
250 verification was not being done in some cases where it should have been.
252 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
253 than one server was defined and depending on the platform memory layout
254 details, an internal consistency trap could be hit while walking the list
257 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
258 files. The value is used by the authresults expansion item. Previously
259 if this was used in a router or transport, a crash could result.
261 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
262 have a sufficient incidence of EINTR returns from select that an
263 interaction with other operations done by the main daemon loop exposed
264 a bug in the error-handling. This was benign apart from the log
267 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
268 for consistency with delivered "=>" and failed "**" lines. While we're
269 there, handle PRX and TFO.
271 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
272 applied. This resulted, if any header-line rewrite rules were configured,
273 in a panic-log triggerable by sending a message with a long address in
274 a header. Fix by increasing the arbitrary limit to larger than a single
275 (dewrapped) 5322 header line maximum size.
277 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
278 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
279 RFC 6648 which deprecates X- options in protocols as a general practice.
280 Changeover between the implementations is handled by the mechanisms
283 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
284 a remote which uses callout/hold. Previously the local was queued.
286 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
289 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
290 log line. The asterisk is now consistently appended to the remote IP
291 (and port, if given), and will also be provided on defer and fail log
292 lines. Previously it could be placed on the local IP if that was being
293 logged, and was only provided on delivery lines.
295 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
297 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
298 authenticator client_send option. Previously the next char, after a pair
299 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
300 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
301 documentation. There is still no way to get a leading ^ immediately
302 after a NUL (ie. for the password of a PLAIN method authenticator.
304 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
305 files. For bad sizes read, delete the record and whine to paniclog.
307 JH/38 When logging an AUTH failure, as server, do not include sensitive
308 information. Previously, the credentials would be included if given
309 as part of the AUTH command line and an ACL denied authentication.
311 JH/39 Bug 2691: fix $local_part_data. When the matching list element
312 referred to a file, bad data was returned. This likely also affected
315 JH/40 The gsasl authenticator now supports caching of the salted password
316 generated by the client-side implementation. This required the addition
317 of a new variable: $auth4.
319 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
320 left undeleted; the attempt to re-create it then failed - resulting in
321 the usual "SIGHUP tp have daemon reload configuration" to not work.
322 This affected any platform not supporting "abstract" Unix-domain
323 sockets (i.e. not Linux).
325 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
326 recipients" response to RCPT in a later response, with a 250. The
327 previous coding assumed this would not happen, and under PIPELINING
328 would result in both lost and duplicate recipients for a message.
330 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
331 Previously the weighting was incorrectly applied. Similar fix for socks
332 proxies. Found and fixed by Heiko Schlichting.
334 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
335 not handle sub-lists included using the +namedlist syntax. While
336 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
337 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
340 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
341 Previously the permanent pool was used, so the sore could not be freed.
342 This meant a connection with many messages would use continually-growing
345 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
346 per-pool so as not to waste too much space. Previously a constant size
347 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
348 DOS attacks harder. The cost is wasted memory use in the larger blocks.
350 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
351 same space repeatedly, and a smaller process footprint.
353 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
354 for GnuTLS. Previously the name started "%s" which, while not a bug,
355 looked as if if might be one.
357 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
358 "continued connection") make the $proxy_* variables available. Previously
359 the information was not passed across the exec() call for subsequent
360 transport executions. This also mean that the log lines for the
361 messages can show the proxy information.
363 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
364 receive time. With modern systems the difference is significant.
365 The historical behaviour can be restored by disabling (a new) log_selector
366 "queue_time_exclusive".
368 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
369 content) were specifically tested for. Now, also cover expansions
370 resulting in ACL names and inline ACL content.
372 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
373 making it unusable in complex expressions.
375 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
376 fail with a taint-check on the spoolfile name, and leave the message
379 HS/01 Enforce absolute PID file path name.
381 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
383 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
385 PP/02 Bug 2643: Correct TLS DH constants.
386 A missing NUL termination in our code-generation tool had led to some
387 incorrect Diffie-Hellman constants in the Exim source.
388 Reported by kylon94, code-gen tool fix by Simon Arlott.
390 PP/03 Impose security length checks on various command-line options.
391 Fixes CVE-2020-SPRSS reported by Qualys.
393 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
394 better. Reported by Qualys.
396 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
397 providing a particularly obnoxious sender full name.
400 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
402 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
405 PP/08 Change default for recipients_max from unlimited to 50,000.
407 PP/09 Fix security issue with too many recipients on a message (to remove a
408 known security problem if someone does set recipients_max to unlimited,
409 or if local additions add to the recipient list).
410 Fixes CVE-2020-RCPTL reported by Qualys.
412 PP/10 Fix security issue in SMTP verb option parsing
413 Fixes CVE-2020-EXOPT reported by Qualys.
415 PP/11 Fix security issue in BDAT state confusion.
416 Ensure we reset known-good where we know we need to not be reading BDAT
417 data, as a general case fix, and move the places where we switch to BDAT
418 mode until after various protocol state checks.
419 Fixes CVE-2020-BDATA reported by Qualys.
421 HS/03 Die on "/../" in msglog file names
423 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
424 the Exim runtime user are allowed to create files.
426 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
429 QS/03 When reading the output from interpreted forward files we do not
430 pass the pipe between the parent and the interpreting process to
431 executed child processes (if any).
433 QS/04 Always die if requested from internal logging, even is logging is
436 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
437 the API; compilation noo longer completes with DMARC support included.
438 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
439 been reported on other platforms.
441 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
443 JH/56 Make the majority of info read from config files readonly, for defence-in-
444 depth against exploits. Suggestion by Qualys.
445 Not supported on Solaris 10.
447 JH/57 Fix control=fakreject for a custom message containing tainted data.
448 Previously this resulted in a log complaint, due to a re-expansion present
449 since fakereject was originally introduced.
451 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
452 modifier was given, a loop resulted.
454 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
455 pipelined SMTP command followed the BDAT LAST then it would be
456 incorrectly treated as part of the message body, causing a verification
459 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
460 require looser validation rules than those for 821-level addresses,
461 which only permit IP addresses.
467 JH/01 Avoid costly startup code when not strictly needed. This reduces time
468 for some exim process initialisations. It does mean that the logging
469 of TLS configuration problems is only done for the daemon startup.
471 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
473 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
474 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
477 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
478 DKIM signing is being done. Previously a transport_filter would always
479 disable CHUNKING, falling back to traditional DATA.
481 JH/05 Regard command-line recipients as tainted.
483 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
485 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
486 PAM library frees one of the arguments given to it, despite the
487 documentation. Therefore a plain malloc must be used.
489 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
490 on-stack buffers were used, resulting in a taint trap when DSN information
491 copied from a received message was written into the buffer.
493 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
494 the ordering of its ARC headers. This caused a crash.
496 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
497 a new record was being constructed with information from the peer, a trap
500 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
501 installation would get error messages from DMARC verify, when it hit the
502 nonexistent file indicated by the default. Distros wanting DMARC enabled
503 should both provide the file and set the option.
504 Also enforce no DMARC verification for command-line sourced messages.
506 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
507 could, depending on the platform, hang at the STARTTLS response.
509 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
510 message on a connection. Previously if one message had ARC headers and
511 the following one did not, a crash could result when adding an
512 Authentication-Results: header.
514 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
515 Exim main code and Exim-related utities. The introduction of taint
516 tracking also did many adjustments to string handling. Since then, eximon
517 frequently terminated with an assert failure.
519 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
520 check for 452 responses. This slightly helps the inefficieny of doing
521 a large alias-expansion into a recipient-limited target. The max_rcpt
522 transport option still applies (and at the current default, will override
523 the new feature). The check is done for either cause of synch, and forces
524 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
525 connection. The new facility is not tunable at this time.
527 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
528 library live data was being used, so the results became garbage. Make
529 copies while it is still usable.
531 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
532 on delivery deferred (==) and failed (**) lines (if a delivery was
533 attemtped). Previously it was only on completion (=>) lines.
535 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
536 for the expansion of the server_scram_iter and server_scram_salt options.
538 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
539 are now specifically given a NO_DATA response without hitting the system
540 resolver. The library goes on to do the now-standard TXT lookup.
541 Use of dnsdb lookups is not affected.
543 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
544 only retrieve the errormessage once. Previously two calls to dlerror()
545 were used, and the second one (for mainlog/paniclog) retrieved null
548 JH/20 Taint checking: disallow use of tainted data for
549 - the appendfile transport file and directory options
550 - the pipe transport command
551 - the autoreply transport file, log and once options
552 - file names used by the redirect router (including filter files)
554 - paths used by single-key lookups
555 Previously this was permitted.
557 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
558 adjusted the size of a major service buffer; this failed because the
559 buffer was in use at the time. Change to a compile-time increase in the
560 buffer size, when this authenticator is compiled into exim.
562 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
563 previous fast-mode was untenable in the face of glibs using mmap to
564 support larger malloc requests.
566 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
567 New values supported, if defined on system where compiled:
568 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
569 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
571 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
572 running a limited number of proceses in parallel, a benefit is gained. The
573 amount varies with the platform hardware and load. The use of the option
574 queue_run_in_order means we cannot do this, as ordering becomes
577 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
578 had introduced a string-copy (for ensuring NUL-termination) which was not
579 appropriate for that case, which can include embedded NUL bytes in the
580 block of data. Investigation showed the copy to actually be needless, the
581 data being length-specified.
583 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
584 done during a receiving connection, and both used TLS, global info was
585 used rather than per-connection info for tracking the state of data
586 queued for transmission. This could result in a connection hang.
588 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
589 Previously, when delivering serveral messages down a single connection
590 only the first would provide a SIZE. This was due to the size information
591 not being properly tracked.
593 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
594 TAI (at 37 seconds currently), pretend to be in UTC for time-related
595 expansion and logging. Previously, spurious values such as a future
596 minute could be seen.
598 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
599 it could crash from a null-deref. This could also affect the
600 ${addresses: } operator and ${readsock } item.
602 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
603 message following a mime one, the variable was not reset.
605 JH/30 When an pipelined-connect fails at the first response, assume incorrect
606 cached capability (perhaps the peer reneged?) and immediately retry in
609 JH/31 Fix spurious detection of timeout while writing to transport filter.
611 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
612 an attempt to copy the string was made before checking it.
614 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
615 taint of the lookup key was maintained; we now regard the presence in the
616 filesystem as sufficient validation.
618 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
619 argument is supplied.
621 JH/35 The dsearch lookup now requires that the directory is an absolute path.
622 Previously this was not checked, and nonempty relative paths made an
623 access under Exim's current working directory.
625 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
626 Previously no event was raised.
628 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
629 parameter supplied by the sender MAIL FROM command. Previously it was
630 ignored, and only the check_spool_space option value for the required
633 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
634 the size of the signing public-key. Previously it was instead giving
635 the size of the signature hash.
637 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
638 the default. See the (new) dkim_verify_min_keysizes option.
640 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
641 and an ACL use a lookup for checking either the local_part or domain,
642 stale data could be accessed. Ensure that variable references are
643 dropped between messages.
645 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
646 by the client was not checked as pointing within response data before
647 being used. A malicious client could thus cause an out-of-bounds read and
648 possibly gain authentication. Fix by adding the check.
650 JH/42 Internationalisation: change the default for downconversion in the smtp
651 transport to be "if needed". Previously it was "as previously set" for
652 the message, which usually meant "if needed" for message-submission but
653 "no" for everything else. However, MTAs have been seen using SMTPUTF8
654 even when the envelope addresses did not need it, resulting in forwarding
655 failures to non-supporting MTAs. A downconvert in such cases will be
656 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
657 transport. The change does mean that addresses needing conversion will
658 be converted when previously a delivery failure would occur.
660 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
661 response was received it would be used unchecked in a fail-DSN, violating
662 standards on line-length limits. Truncate if needed.
664 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
665 doesn't work. (Additionally add a new main config option to configure the
672 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
673 side, to decode a TLS 1.3 packet capture.
675 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
676 Previously the default library behaviour applied, sending two, each in
679 JH/03 Debug output for ACL now gives the config file name and line number for
682 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
684 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
686 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
687 buffer overrun for (non-chunking) other transports.
689 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
690 TLS1.3, means that a server rejecting a client certificate is not visible
691 to the client until the first read of encrypted data (typically the
692 response to EHLO). Add detection for that case and treat it as a failed
693 TLS connection attempt, so that the normal retry-in-clear can work (if
694 suitably configured).
696 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
697 and/or domain. Found and fixed by Jason Betts.
699 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
700 configuration). If a CNAME target was not a wellformed name pattern, a
703 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
704 the OS reports them interleaved with other addresses.
706 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
707 used both for input and for a verify callout, both encrypted, SMTP
708 responses being sent by the server could be lost. This resulted in
709 dropped connections and sometimes bounces generated by a peer sending
712 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
713 string. Previously it was possible to cause undefined behaviour in a
714 library routine (usually a crash). Found by "zerons".
716 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
719 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
720 API was removed, so update to use the newer ones.
722 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
723 any timeout set, is taking a long time. Previously we would hang on to a
724 rotated logfile "forever" if the input was arriving with long gaps
725 (a previous attempt to fix addressed lack, for a long time, of initial
728 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
729 shared (NFS) environment. The length of the tempfile name is now
730 4 + 16 ("hdr.$message_exim_id") which might break on file
731 systems which restrict the file name length to lower values.
734 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
735 shared (NFS) environment.
737 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
738 did for all versions <4.90). Notably -M, -m, --invert, -I may be
741 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
742 on some platforms for bit 31.
744 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
745 to changes apparently associated with TLS1.3 handling some of the APIs
746 previously used were either nonfunctional or inappropriate. Strings
747 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
748 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
749 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
750 This affects log line X= elements, the $tls_{in,out}_cipher variables,
751 and the use of specific cipher names in the encrypted= ACL condition.
753 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
755 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
756 verification result was not updated unless hosts_require_ocsp applied.
758 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
759 queue_list_requires_admin set to false, non-admin users were denied the
762 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
763 directory-of-certs mode. Previously they were advertised despite the
766 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
767 A single TCP connection by a client will now hold a TLS connection open
768 for multiple message deliveries, by default. Previously the default was to
771 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
772 default. If built with the facility, DANE will be used. The facility
773 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
775 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
776 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
777 must be defined and you must still, unless you define DISABLE_TLS, manage
778 the the include-dir and library-file requirements that go with that
779 choice. Non-TLS builds are still supported.
781 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
784 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
785 default. If the platform supports and has the facility enabled, it will
786 be requested on all coneections.
788 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
789 controlled by the build-time option SUPPORT_PIPE_CONNECT.
791 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
793 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
794 success-DSN messages. Previously the From: header was always the default
795 one for these; the option was ignored.
797 JH/28 Fix the timeout on smtp response to apply to the whole response.
798 Previously it was reset for every read, so a teergrubing peer sending
799 single bytes within the time limit could extend the connection for a
800 long time. Credit to Qualsys Security Advisory Team for the discovery.
802 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
803 delivery address, which leaked information of the results of local
804 forwarding. Change to the original envelope recipient address, per
807 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
808 requested. Previously not bounce was generated and a log entry of
809 error ignored was made.
811 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
813 JH/32 Introduce a general tainting mechanism for values read from the input
814 channel, and values derived from them. Refuse to expand any tainted
815 values, to catch one form of exploit.
817 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
818 was unused and the unexpanded text used for the test. Found and
819 fixed by Ruben Jenster.
821 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
822 an attempt to use a TLS library read routine dereffed a nul pointer,
825 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
826 them in our smtp response.
828 JH/36 Have the general router option retry_use_local_part default to true when
829 any of the restrictive preconditions are set (to anything). Previously it
830 was only for check_local user. The change removes one item of manual
831 configuration which is required for proper retries when a remote router
832 handles a subset of addresses for a domain.
834 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
835 link count into consideration.
837 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
838 caused the extension of big_buffer, the following lines were ignored.
840 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
841 accordance with RFC 2308. Previously there was no expiry, so a longlived
842 receive process (eg. due to ACL delays) versus a short SOA value could
845 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
847 JH/39 Promote DMARC support to mainline.
849 JH/40 Bug 2452: Add a References: header to DSNs.
851 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
852 parameters. The relevant library call is documented as "Deprecated: This
853 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
854 3.6.0, DH parameters are negotiated following RFC7919."
856 HS/06 Change the default of dnssec_request_domains to "*"
858 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
859 carried on and emitted a BDAT command, even when PIPELINING was not
862 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
863 buffer was used for the filename, resulting in a trap when tainted
864 arguments (eg. $domain) were used.
866 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
867 recommended to avoid a possible server-load attack. The feature can be
868 re-enabled via the openssl_options main cofiguration option.
870 JH/45 local_scan API: documented the current smtp_printf() call. This changed
871 for version 4.90 - adding a "more data" boolean to the arguments.
872 Bumped the ABI version number also, this having been missed previously;
873 release versions 4.90 to 4.92.3 inclusive were effectively broken in
874 respect of usage of smtp_printf() by either local_scan code or libraries
875 accessed via the ${dlfunc } expansion item. Both will need coding
876 adjustment for any calls to smtp_printf() to match the new function
877 signature; a FALSE value for the new argument is always safe.
879 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
880 the file-offset (which the Linux syscall does, and exim expects); this
881 resulted in an indefinite loop.
883 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
884 to do ARC verification. The Authentication-Results: header line added
885 by the configuration then had no ARC item.
887 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
888 an incorrect mode was used for reading the result, resulting in it being
895 JH/01 Remove code calling the customisable local_scan function, unless a new
896 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
898 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
899 non-signal-safe functions being used.
901 JH/03 Bug 2269: When presented with a received message having a stupidly large
902 number of DKIM-Signature headers, disable DKIM verification to avoid
903 a resource-consumption attack. The limit is set at twenty.
905 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
906 report of oldest_pass in ${authres } in consequence, and separate out
907 some descriptions of reasons for verification fail.
909 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
910 files in the spool were present and unlocked. A queue-runner could spot
911 them, resulting in a duplicate delivery. Fix that by doing the unlock
912 after the unlink. Investigation by Tim Stewart. Take the opportunity to
913 add more error-checking on spoolfile handling while that code is being
916 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
917 No known attacks, no CVE, this is defensive hardening.
919 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
920 a queue-runner could start a delivery while other operations were ongoing.
921 Cutthrough delivery was a common victim, resulting in duplicate delivery.
922 Found and investigated by Tim Stewart. Fix by using the open message data
923 file handle rather than opening another, and not locally closing it (which
924 releases a lock) for that case, while creating the temporary .eml format
925 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
927 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
928 $sender_verify_failure/$recipient_verify_failure to "random".
930 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
933 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
934 Previously this would segfault.
936 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
939 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
940 like zero, since the resolver should be doing this for us, But we need one
941 as a CNAME but no MX presence gets the CNAME returned; we need to check
942 that doesn't point to an MX to declare it "no MX returned" rather than
943 "error, loop". A new main option is added so the older capability of
944 following some limited number of chain links is maintained.
946 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
948 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
949 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
950 now-deprecated earlier definitions used only specified the range up to TLS
951 1.2 (in the older-version library docs).
953 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
955 JH/15 Rework TLS client-side context management. Stop using a global, and
956 explicitly pass a context around. This enables future use of TLS for
957 connections to service-daemons (eg. malware scanning) while a client smtp
958 connection is using TLS; with cutthrough connections this is quite likely.
960 JH/16 Fix ARC verification to do AS checks in reverse order.
962 JH/17 Support a "tls" option on the ${readsocket } expansion item.
964 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
965 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
966 Previously the "utf8" would be re-prepended for every additional message.
968 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
969 Previously thery were accepted, resulting in issues when attempting to
970 forward messages to a non-supporting MTA.
972 PP/02 Let -n work with printing macros too, not just options.
974 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
975 one parent address was copied, and bogus data was used at delivery-logging
976 time. Either a crash (after delivery) or bogus log data could result.
977 Discovery and analysis by Tim Stewart.
979 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
980 Previously if the string ended mid-character, we did not insert the
981 promised '?' replacement.
983 PP/04 Documentation: current string operators work on bytes, not codepoints.
985 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
986 should pack well giving a smaller memory footprint so better caching and
987 therefore performance. Group the declarations where this can't be done so
988 that the byte-sized flag variables are not interspersed among pointer
989 variables, giving a better chance of good packing by the compiler.
991 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
992 non-null, to avoid issues with sites running BATV. Previously reports were
993 sent with an empty envelope sender so looked like bounces.
995 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
996 The ignore_error flag wasn't being returned from the filter subprocess so
997 was not set for later routers. Investigation and fix by Matthias Kurz.
999 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1000 and a msg:complete for the whole, when a message is manually removed using
1001 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1003 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1004 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1005 hope that is portable enough.
1007 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1008 requiring a known-CA anchor certificate; make it now rely entirely on the
1009 TLSA as an anchor. Checking the name on the leaf cert against the name
1010 on the A-record for the host is still done for TA (but not for EE mode).
1012 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1013 included in delivery lines for non-proxied connections, when compiled with
1014 SUPPORT_SOCKS and running with proxy logging enabled.
1016 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1017 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1018 move the existing event to fire before the normal logging of message
1019 failure so that custom logging is bracketed by normal logging.
1021 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1022 msg:fail:internal event. Developement by Matthias Kurz.
1024 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1025 far too small for todays use of crypto signatures stored there. Go all
1026 the way to the max DNS message size of 64kB, even though this might be
1027 overmuch for IOT constrained device use.
1029 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1030 copy a string over itself. The library routine is documented as not
1031 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1033 JH/32 For main options check_spool_space and check_inode_space, where the
1034 platform supports 64b integers, support more than the previous 2^31 kB
1035 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1036 the previous G, M, k.
1038 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1039 $authenticated_fail_id variable on authentication failure. Previously
1042 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1043 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1044 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1045 GNUTLS_SEC_PARAM_MEDIUM.
1047 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1048 side. Previously we would continue as if no SNI had been received.
1050 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1051 "<" character, which should be a list-separator specification, we walked
1052 off past the nul-terimation.
1054 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1055 causes) even when the retry time is not yet met. Previously they were
1056 not, meaning that when (say) an account was over-quota and temp-rejecting,
1057 and multiple senders' messages were queued, only one sender would get
1058 notified on each configured delay_warning cycle.
1060 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1062 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1063 cipher-suites, an error can be left on the stack even for a succeeding
1064 accept; this results in impossible error messages when a later operation
1067 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1068 return error codes indicating retry. Under TLS1.3 this becomes required.
1070 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1071 it only wrote the new authenticators, resulting in a lack of tracking of
1072 peer changes of ESMTP extensions until the next cache flush.
1074 JH/41 Fix the loop reading a message header line to check for integer overflow,
1075 and more-often against header_maxsize. Previously a crafted message could
1076 induce a crash of the recive process; now the message is cleanly rejected.
1078 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1079 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1085 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1086 When redis_servers is set to a list of > 1 element, and the Redis servers
1087 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1088 case of MOVED into a DEFER case instead, thus moving the query onto the
1089 next server in the list. For a cluster of N elements, all N servers must
1090 be defined in redis_servers.
1092 GF/02 Catch and remove uninitialized value warning in exiqsumm
1093 Check for existence of @ARGV before looking at $ARGV[0]
1095 JH/01 Replace the store_release() internal interface with store_newblock(),
1096 which internalises the check required to safely use the old one, plus
1097 the allocate and data copy operations duplicated in both (!) of the
1098 extant use locations.
1100 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1101 modifier. This matches the restriction on the commandline.
1103 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1104 Previously only the last row was returned.
1106 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1107 we assumed that tags in the header were well-formed, and parsed the
1108 element content after inspecting only the first char of the tag.
1109 Assumptions at that stage could crash the receive process on malformed
1112 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1113 While running the DKIM ACL we operate on the Permanent memory pool so that
1114 variables created with "set" persist to the DATA ACL. Also (at any time)
1115 DNS lookups that fail create cache records using the Permanent pool. But
1116 expansions release any allocations made on the current pool - so a dnsdb
1117 lookup expansion done in the DKIM ACL releases the memory used for the
1118 DNS negative-cache, and bad things result. Solution is to switch to the
1119 Main pool for expansions.
1120 While we're in that code, add checks on the DNS cache during store_reset,
1121 active in the testsuite.
1122 Problem spotted, and debugging aided, by Wolfgang Breyha.
1124 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1125 When none of the hosts presented to a transport match an already-open
1126 connection, close it and proceed with the list. Previously we would
1127 queue the message. Spotted by Lena with Yahoo, probably involving
1130 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1131 Previously a spurious "250 OK id=" response was appended to the proper
1134 JH/08 The "support for" informational output now, which built with Content
1135 Scanning support, has a line for the malware scanner interfaces compiled
1136 in. Interface can be individually included or not at build time.
1138 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1139 by the template makefile "src/EDITME". The "STREAM" support for an older
1140 ClamAV interface method is removed.
1142 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1143 rows affected is given instead).
1145 JH/11 The runtime Berkeley DB library version is now additionally output by
1146 "exim -d -bV". Previously only the compile-time version was shown.
1148 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1149 SMTP connection. Previously, when one had more recipients than the
1150 first, an abortive onward connection was made. Move to full support for
1151 multiple onward connections in sequence, handling cutthrough connection
1152 for all multi-message initiating connections.
1154 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1155 routers. Previously, a multi-recipient message would fail to match the
1156 onward-connection opened for the first recipient, and cause its closure.
1158 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1159 a timeout on read on a GnuTLS initiating connection, resulting in the
1160 initiating connection being dropped. This mattered most when the callout
1161 was marked defer_ok. Fix to keep the two timeout-detection methods
1164 JH/15 Relax results from ACL control request to enable cutthrough, in
1165 unsupported situations, from error to silently (except under debug)
1166 ignoring. This covers use with PRDR, frozen messages, queue-only and
1169 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1171 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1172 metadata, resulting in a crash in free().
1174 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1175 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1176 Broken also in d185889f4, with init system revamp.
1178 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1179 Previously we abruptly closed the connection after reading a malware-
1180 found indication; now we go on to read the "scan ok" response line,
1183 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1184 ACL. Previously, a crash would result.
1186 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1187 macro text after a replacement (previously it was only once per line) and
1188 by skipping builtin macros when searching for an uppercase lead character.
1190 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1191 for the build is renamed.
1193 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1194 was allocated for every new TLS startup, meaning one per message. Fix
1195 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1197 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1198 reported the original. Fix to report (as far as possible) the ACL
1199 result replacing the original.
1201 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1202 OpenSSL. Certificate information is loaded for every new TLS startup,
1203 and the resources needed to be freed.
1205 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1207 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1210 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1211 DATA response info to the (existing) per-recipient response info for
1212 the "C=" log element. It can have useful tracking info from the
1213 destination system. Patch from Simon Arlott.
1215 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1216 length value. Previously this would segfault.
1218 HS/02 Support Avast multiline protoocol, this allows passing flags to
1219 newer versions of the scanner.
1221 JH/28 Ensure that variables possibly set during message acceptance are marked
1222 dead before release of memory in the daemon loop. This stops complaints
1223 about them when the debug_store option is enabled. Discovered specifically
1224 for sender_rate_period, but applies to a whole set of variables.
1225 Do the same for the queue-runner and queue-list loops, for variables set
1226 from spool message files. Do the same for the SMTP per-message loop, for
1227 certain variables indirectly set in ACL operations.
1229 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1230 as a multi-recipient message from a mailinglist manager). The coding had
1231 an arbitrary cutoff number of characters while checking for more input;
1232 enforced by writing a NUL into the buffer. This corrupted long / fast
1233 input. The problem was exposed more widely when more pipelineing of SMTP
1234 responses was introduced, and one Exim system was feeding another.
1235 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1236 receiving system, and refused recipients seen by the sending system
1237 (propating to people being dropped from mailing lists).
1238 Discovered and pinpointed by David Carter.
1240 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1241 replaced by the ${authresults } expansion.
1243 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1245 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1246 allows proper process termination in container environments.
1248 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1249 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1251 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1252 and "err_perm", deprecated since 4.83 when the RFC-defined words
1253 "temperror" and "permerror" were introduced.
1255 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1256 transport-filters or DKIM-signing. The restriction was lost in the
1257 consolidation of verify-callout and delivery SMTP handling.
1258 Extend the restriction to also cover ARC-signing.
1260 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1261 in defer=pass mode supply a 450 to the initiator. Previously the message
1264 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1265 tls_require_ciphers is used as before.
1267 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1268 "pass_unscanned". Only tmpfails from the scanner are written to
1269 the paniclog, as they may require admin intervention (permission
1270 denied, license issues). Other scanner errors (like decompression
1271 bombs) do not cause a paniclog entry.
1273 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1274 Previously it was possible to log spurious information in receive log
1277 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1278 triggered odd behaviour from Outlook Express clients.
1280 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1283 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1284 since the IETF WG has not yet settled on that versus the original
1285 "bare" representation.
1287 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1288 Previously the millisecond value corrupted the output.
1289 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1290 corrupted the output.
1296 JH/01 Rework error string handling in TLS interface so that the caller in
1297 more cases is responsible for logging. This permits library-sourced
1298 string to be attached to addresses during delivery, and collapses
1299 pairs of long lines into single ones.
1301 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1302 during configuration. Wildcards are allowed and expanded.
1304 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1305 This permits better logging.
1307 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1308 do not close it down and have the child transport start it up again on
1309 the passed-on TCP connection. Instead, proxy the child (and any
1310 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1311 affected: the continued delivery log lines do not have any DNSSEC, TLS
1312 Certificate or OCSP information. TLS cipher information is still logged.
1314 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1315 identical IP addresses on different listening ports. Will also affect
1318 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1319 add noisy ifdef guards to special-case this sillyness.
1320 Patch from Bernd Kuhls.
1322 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1323 than 255 are no longer allowed.
1325 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1326 Disable the session-cache too, which might reduce our load. Since we
1327 currrectly use a new context for every connection, both as server and
1328 client, there is no benefit for these.
1329 GnuTLS appears to not support tickets server-side by default (we don't
1330 call gnutls_session_ticket_enable_server()) but client side is enabled
1331 by default on recent versions (3.1.3 +) unless the PFS priority string
1334 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1335 <https://reproducible-builds.org/specs/source-date-epoch/>.
1337 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1338 the check for any unsuccessful recipients did not notice the limit, and
1339 erroneously found still-pending ones.
1341 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1342 MSG_MORE. Only in-clear (not on TLS connections).
1344 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1345 transport-filter is involved we can buffer the headers in memory for
1346 creating the signature, and read the spool data file once for the
1347 signature and again for transmission.
1349 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1350 4.77 as the kernel support then wasn't solid, having issues in 64bit
1351 mode. Now, it's been long enough. Add support for FreeBSD also.
1353 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1354 case where the routing stage had gathered several addresses to send to
1355 a host before calling the transport for the first, we previously failed
1356 to close down TLS in the old transport process before passing the TCP
1357 connection to the new process. The new one sent a STARTTLS command
1358 which naturally failed, giving a failed delivery and bloating the retry
1359 database. Investigation and fix prototype from Wolfgang Breyha.
1361 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1362 false-negatives in the check that the sender had not preempted a response
1363 or prompt from Exim (running as a server), due to that code's lack of
1364 awareness of the SMTP input buffering.
1366 PP/04 Add commandline_checks_require_admin option.
1367 Exim drops privileges sanely, various checks such as -be aren't a
1368 security problem, as long as you trust local users with access to their
1369 own account. When invoked by services which pass untrusted data to
1370 Exim, this might be an issue. Set this option in main configuration
1371 AND make fixes to the calling application, such as using `--` to stop
1374 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1375 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1376 responses to those, into a single TLS record each way (this usually means
1377 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1380 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1381 affects you only if you're dancing at the edge of the param size limits.
1382 If you are, and this message makes sense to you, then: raise the
1383 configured limit or use OpenSSL 1.1. Nothing we can do for older
1386 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1387 cmdline element to get the documented default one. Previously it was
1390 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1391 are unsuable for non-message-specific reasons - eg. connection timeout,
1392 banner-time rejection.
1394 JH/16 Fix logging of delivery remote port, when specified by router, under
1397 PP/06 Repair manualroute's ability to take options in any order, even if one
1398 is the name of a transport.
1401 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1403 JH/17 Change the list-building routines interface to use the expanding-string
1404 triplet model, for better allocation and copying behaviour.
1406 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1407 Previously it was constructed the first time a possibly-matching string
1408 was met in the configuration file input during startup; now it is done
1411 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1412 compatible one, to avoid the (poorly documented) possibility of a config
1413 file in the working directory redirecting the DB files, possibly correpting
1414 some existing file. CVE-2017-10140 assigned for BDB.
1416 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1417 cache-hot. Previously, although the result was properly cached, the
1418 initial verify call returned a defer.
1420 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1421 the main verify for receipient in uncached-mode.
1423 JH/22 Retire historical build files to an "unsupported" subdir. These are
1424 defined as "ones for which we have no current evidence of testing".
1426 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1427 if present. Previously it was ignored.
1429 JH/24 Start using specified-initialisers in C structure init coding. This is
1430 a C99 feature (it's 2017, so now considered safe).
1432 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1433 if was a fixed-sized field and bitmask ops via macros; it is now more
1436 PP/07 GitHub PR 56: Apply MariaDB build fix.
1437 Patch provided by Jaroslav Škarvada.
1439 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1440 during Coverity cleanups [4.87 JH/47]
1441 Diagnosis and fix provided by Michael Fischer v. Mollard.
1443 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1444 the right size to place the terminating semicolon on its own folded
1445 line, the header hash was calculated to an incorrect value thanks to
1446 the (relaxed) space the fold became.
1448 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1449 and confused the parent.
1451 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1452 which could crash as a result. This could lead to undeliverable messages.
1454 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1457 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1458 matters on fast-turnover and PID-randomising systems, which were getting
1459 out-of-order delivery.
1461 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1462 a possibly-overlapping copy. The symptom was that "Remote host closed
1463 connection in response to HELO" was logged instead of the actual 4xx
1466 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1467 Previously only that bufferd was discarded, resulting in SYMTP command
1470 JH/32 DKIM: when a message has multiple signatures matching an identity given
1471 in dkim_verify_signers, run the dkim acl once for each. Previously only
1472 one run was done. Bug 2189.
1474 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1475 "panic the current process" to "deliberately defer". The panic log is
1476 still written with the problem list name; the mail and reject logs now
1477 get a temp-reject line for the message that was being handled, saying
1478 something like "domains check lookup or other defer". The SMTP 451
1479 message is still "Temporary local problem".
1481 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1482 A crafted sequence of BDAT commands could result in in-use memory beeing
1483 freed. CVE-2017-16943.
1485 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1486 from SMTP input. Previously it was always done; now only done for DATA
1487 and not BDAT commands. CVE-2017-16944.
1489 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1490 to the message (such as an overlong header line). Previously this was
1491 not done and we did not exit BDAT mode. Followon from the previous item
1492 though a different problem.
1498 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1499 than -2003 did; needs libidn2 in addition to libidn.
1501 JH/02 The path option on a pipe transport is now expanded before use.
1503 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1504 Patch provided by "Björn", documentation fix added too.
1506 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1507 missing a wire-to-host endian conversion.
1509 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1510 close after a BDAT command line could be taken as a following command,
1511 giving a synch failure. Fix by only checking for synch immediately
1512 before acknowledging the chunk.
1514 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1515 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1516 macro. Patches provided by Josh Soref.
1518 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1519 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1520 by IANA as a service extension. However, John Klensin suggests that we
1523 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1524 the dkim code may be unix-mode line endings rather than smtp wire-format
1525 CRLF, so prepend a CR to any bare LF.
1527 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1528 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1530 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1531 the first were themselves being wrongly included in the feed into dkim
1532 processing; with most chunk sizes in use this resulted in an incorrect
1533 body hash calculated value.
1535 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1536 DKIM signature block, for verification. Although advised against by
1537 standards it is specifically not ruled illegal.
1539 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1541 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1542 missing a body hash (the bh= tag).
1544 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1545 It seems that HAProxy sends the Proxy Protocol information in clear and
1546 only then does a TLS startup, so do the same.
1548 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1549 TCP connections (such as for Spamd) unless the daemon successfully set
1550 Fast Open mode on its listening sockets. This fixes breakage seen on
1551 too-old kernels or those not configured for Fast Open, at the cost of
1552 requiring both directions being enabled for TFO, and TFO never being used
1553 by non-daemon-related Exim processes.
1555 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1556 endings, at least on the first header line. Try to canonify any that get
1557 past that check, despite the cost.
1559 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1560 now limited to an arbitrary five deep, while parsing addresses with the
1561 strip_excess_angle_brackets option enabled.
1563 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1564 instead leave the unprompted TLS handshake in socket buffer for the
1565 TLS library to consume.
1567 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1569 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1571 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1572 region in one operation, for speed, and this leaves assigned pointers
1573 dangling. Add checks run only under the testsuite which checks all
1574 variables at a store-reset and panics on a dangling pointer; add code
1575 explicitly nulling out all the variables discovered. Fixes one known
1576 bug: a transport crash, where a dangling pointer for $sending_ip_address
1577 originally assigned in a verify callout, is re-used.
1579 PP/06 Drop '.' from @INC in various Perl scripts.
1581 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1583 PP/08 Reduce a number of compilation warnings under clang; building with
1584 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1585 should be warning-free.
1587 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1589 HS/01 Fix portability problems introduced by PP/08 for platforms where
1590 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1592 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1593 chunk. This allows us to accept broken chunked messages. We need a more
1594 general solution here.
1596 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1597 already-broken messages in the queue.
1599 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1601 JH/19 Fix reference counting bug in routing-generated-address tracking.
1607 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1608 supports it and a size is available (ie. the sending peer gave us one).
1610 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1611 years of being deprecated). The replacements are the ACLs
1612 acl_smtp_mime and acl_not_smtp_mime.
1614 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1615 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1616 or even an in-clear connection were permitted. Now, if the host lookup
1617 was dnssec and dane was requested then the host is only used if the
1618 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1619 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1620 if one fails this test.
1621 This means that a poorly-configured remote DNS will make it incommunicado;
1622 but it protects against a DNS-interception attack on it.
1624 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1625 non-noisy when a race steals the message being considered.
1627 JH/05 If main configuration option tls_certificate is unset, generate a
1628 self-signed certificate for inbound TLS connections.
1630 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1631 in rewrites and routers.
1633 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1634 and logged a warning sing 4.83; now they are a configuration file error.
1636 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1637 (lacking @domain). Apply the same qualification processing as RCPT.
1639 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1641 JH/10 Support ${sha256:} applied to a string (as well as the previous
1644 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1645 a cutthrough deliver is pending, as we always want to make a connection.
1646 This also avoids re-routing the message when later placing the cutthrough
1647 connection after a verify cache hit.
1648 Do not update it with the verify result either.
1650 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1651 when routing results in more than one destination address.
1653 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1654 signing (which inhibits the cutthrough capability). Previously only
1655 the presence of an option was tested; now an expansion evaluating as
1656 empty is permissible (obviously it should depend only on data available
1657 when the cutthrough connection is made).
1659 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1660 the relevant preceding SMTP command did not note the pipelining mode.
1662 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1663 Previously they were not counted.
1665 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1666 as one having no matching records. Previously we deferred the message
1667 that needed the lookup.
1669 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1670 distinguished as "(=".
1672 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1673 for missing MX records. Previously it only worked for missing A records.
1675 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1677 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1678 after the data-go-ahead and data-ack. Patch from Jason Betts.
1680 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1681 even for a "none" policy. Patch from Tony Meyer.
1683 JH/22 Fix continued use of a connection for further deliveries. If a port was
1684 specified by a router, it must also match for the delivery to be
1687 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1688 When one of the recipients of a message was unsuitable for the connection
1689 (has no matching addresses), we lost track of needing to mark it
1690 deferred. As a result mail would be lost.
1692 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1694 JH/25 Decoding ACL controls is now done using a binary search; the source code
1695 takes up less space and should be simpler to maintain. Merge the ACL
1696 condition decode tables also, with similar effect.
1698 JH/26 Fix problem with one_time used on a redirect router which returned the
1699 parent address unchanged. A retry would see the parent address marked as
1700 delivered, so not attempt the (identical) child. As a result mail would
1703 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1704 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1705 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1708 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1709 Main config options check_{log,spool}_{inodes,space} are now
1710 100 inodes, 10MB unless set otherwise in the configuration.
1712 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1713 Previously it only applied to the main-section connection policy
1716 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1718 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1719 by me. Added RFC7919 DH primes as an alternative.
1721 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1722 are not in the system include path.
1724 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1725 GnuTLS, when a session startup failed (eg because the client disconnected)
1726 Exim did stdio operations after fclose. This was exposed by a recent
1727 change which nulled out the file handle after the fclose.
1729 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1730 signed directly by the cert-signing cert, rather than an intermediate
1731 OCSP-signing cert. This is the model used by LetsEncrypt.
1733 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1735 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1736 an incoming connection.
1738 HS/02 Bug 1802: Do not half-close the connection after sending a request
1741 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1742 fallback to "prime256v1".
1744 JH/34 SECURITY: Use proper copy of DATA command in error message.
1745 Could leak key material. Remotely exploitable. CVE-2016-9963.
1751 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1752 and 3.4.4 - once the server is enabled to respond to an OCSP request
1753 it does even when not requested, resulting in a stapling non-aware
1754 client dropping the TLS connection.
1756 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1757 support variable-length bit vectors. No functional change.
1759 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1760 The I= interface field on outgoing lines is now after the H= remote
1761 host field, same as incoming lines. There is a separate
1762 outgoing_interface log selector which allows you to disable the
1765 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1766 If not running log_selector +smtp_connection the mainlog would be held
1767 open indefinitely after a "too many connections" event, including to a
1768 deleted file after a log rotate. Leave the per net connection logging
1769 leaving it open for efficiency as that will be quickly detected by the
1770 check on the next write.
1772 HS/01 Bug 1671: Fix post transport crash.
1773 Processing the wait-<transport> messages could crash the delivery
1774 process if the message IDs didn't exist for some reason. When
1775 using 'split_spool_directory=yes' the construction of the spool
1776 file name failed already, exposing the same netto behaviour.
1778 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1779 mime_regex ACL conditions.
1781 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1782 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1783 to HELO, local diagnostic string.
1785 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1786 log line to debug. Even when configured with a tls authenticator many
1787 client connections are expected to not authenticate in this way, so
1788 an authenticate fail is not an error.
1790 HS/02 Add the Exim version string to the process info. This way exiwhat
1791 gives some more detail about the running daemon.
1793 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1794 matter for fast-change records such as DNSBLs.
1796 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1797 retry record, even if constant. There may be multiple transports with
1798 different interface settings and the retry behaviour needs to be kept
1801 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1803 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1805 JH/10 Bug 840: fix log_defer_output option of pipe transport
1807 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1808 hosts_randomize. This matters a lot when combined with mua_wrapper.
1810 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1811 ${quote_pgsql:<string>} operator.
1813 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1815 JH/14 Change header file name for freeradius-client. Relevant if compiling
1816 with Radius support; from the Gentoo tree and checked under Fedora.
1818 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1820 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1821 option transport_filter, meaning no filtering.
1823 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1825 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1826 defaults to "*" (all hosts). The variable is now available when not built
1827 with TLS, default unset, mainly to enable keeping the testsuite sane.
1828 If a server certificate is not supplied (via tls_certificate) an error is
1829 logged, and clients will find TLS connections fail on startup. Presumably
1830 they will retry in-clear.
1831 Packagers of Exim are strongly encouraged to create a server certificate
1832 at installation time.
1834 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1835 with the $config_file variable.
1837 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1838 in transport context, after the attempt, and per-recipient. The latter type
1839 is per host attempted. The event data is the error message, and the errno
1840 information encodes the lookup type (A vs. MX) used for the (first) host,
1841 and the trailing two digits of the smtp 4xx response.
1843 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1844 to write to mainlog (or rejectlog, paniclog) in the window between file
1845 creation and permissions/ownership being changed. Particularly affects
1846 installations where exicyclog is run as root, rather than exim user;
1847 result is that the running daemon panics and dies.
1849 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1851 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1852 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1853 "pri" and "weight". Note that the previous implicit priority given by the
1854 list order is no longer honoured.
1856 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1857 for DKIM processing.
1859 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1860 by defining SUPPORT_SOCKS.
1862 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1863 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1864 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1865 variables are renamed to proxy_{local,external}_{address,port}.
1867 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1868 for a build by defining SUPPORT_I18N
1870 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1871 of the query string, and make ${quote_redis:} do that quoting.
1873 JH/29 Move Events support from Experimental to mainline, enabled by default
1874 and removable for a build by defining DISABLE_EVENT.
1876 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1878 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1879 cached by the daemon.
1881 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1882 by defining LOOKUP_REDIS. The libhiredis library is required.
1884 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1885 keys are given for lookup.
1887 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1888 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1889 only supported when built with TLS support. The PolarSSL SHA routines
1890 are still used when the TLS library is too old for convenient support.
1892 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1893 openssl_options), for security. OpenSSL forces this from version 1.1.0
1894 server-side so match that on older versions.
1896 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1897 allocation for $value could be released as the expansion processing
1898 concluded, but leaving the global pointer active for it.
1900 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1901 and to use the domains and local_parts ACL conditions.
1903 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1904 incorrectly not doubled on cutthrough transmission, hence seen as a
1905 body-termination at the receiving system - resulting in truncated mails.
1906 Commonly the sender saw a TCP-level error, and retransmitted the message
1907 via the normal store-and-forward channel. This could result in duplicates
1908 received - but deduplicating mailstores were liable to retain only the
1909 initial truncated version.
1911 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1913 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1915 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1916 we're in there, support oversigning also; bug 1309.
1918 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1920 HS/04 Add support for keep_environment and add_environment options.
1922 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1923 either intentional arithmetic overflow during PRNG, or testing config-
1926 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1927 delivery resulted in actual delivery. Cancel cutthrough before DATA
1930 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1931 rejects a recipient: pass the reject to the originator.
1933 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1934 Many were false-positives and ignorable, but it's worth fixing the
1937 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1938 for the new environment-manipulation done at startup. Move the routines
1939 from being local to tls.c to being global via the os.c file.
1941 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1942 an extract embedded as result-arg for a map, the first arg for extract
1943 is unavailable so we cannot tell if this is a numbered or keyed
1944 extraction. Accept either.
1950 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1953 JH/02 The smtp transport option "multi_domain" is now expanded.
1955 JH/03 The smtp transport now requests PRDR by default, if the server offers
1958 JH/04 Certificate name checking on server certificates, when exim is a client,
1959 is now done by default. The transport option tls_verify_cert_hostnames
1960 can be used to disable this per-host. The build option
1961 EXPERIMENTAL_CERTNAMES is withdrawn.
1963 JH/05 The value of the tls_verify_certificates smtp transport and main options
1964 default to the word "system" to access the system default CA bundle.
1965 For GnuTLS, only version 3.0.20 or later.
1967 JH/06 Verification of the server certificate for a TLS connection is now tried
1968 (but not required) by default. The verification status is now logged by
1969 default, for both outbound TLS and client-certificate supplying inbound
1972 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1975 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1976 Status Notification (bounce) messages are now MIME format per RFC 3464.
1977 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1978 under the control of the dsn_advertise_hosts option, and routers may
1979 have a dsn_lasthop option.
1981 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1982 default, modifiable by a malware= option. The list separator for
1983 the options can now be changed in the usual way. Bug 68.
1985 JH/10 The smtp_receive_timeout main option is now expanded before use.
1987 JH/11 The incoming_interface log option now also enables logging of the
1988 local interface on delivery outgoing connections.
1990 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1991 if the interface and destination host and port all match.
1993 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1996 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1997 Patch from Andrew Lewis.
1999 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2000 now supports optional time-restrictions, weighting, and priority
2001 modifiers per server. Patch originally by <rommer@active.by>.
2003 JH/16 The spamd_address main option now supports a mixed list of local
2004 and remote servers. Remote servers can be IPv6 addresses, and
2005 specify a port-range.
2007 JH/17 Bug 68: The spamd_address main option now supports an optional
2008 timeout value per server.
2010 JH/18 Bug 1581: Router and transport options headers_add/remove can
2011 now have the list separator specified.
2013 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2016 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2019 JH/21 Support for the A6 type of dns record is withdrawn.
2021 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2022 rather than the verbs used.
2024 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2025 from 255 to 1024 chars.
2027 JH/24 Verification callouts now attempt to use TLS by default.
2029 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2030 are generic router options now. The defaults didn't change.
2032 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2033 Original patch from Alexander Shikoff, worked over by JH.
2035 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2036 files if ZCAT_COMMAND is not executable.
2038 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2040 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2042 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2043 Normally benign, it bites when the pair was led to by a CNAME;
2044 modern usage is to not canonicalize the domain to a CNAME target
2045 (and we were inconsistent anyway for A-only vs AAAA+A).
2047 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2049 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2050 when evaluating $sender_host_dnssec.
2052 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2053 $sender_helo_dnssec variable.
2055 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2057 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2059 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2061 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2062 documented as working, but never had. Support all but $spam_report.
2064 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2065 added for tls authenticator.
2067 HS/03 Add perl_taintmode main config option
2073 TL/01 When running the test suite, the README says that variables such as
2074 no_msglog_check are global and can be placed anywhere in a specific
2075 test's script, however it was observed that placement needed to be near
2076 the beginning for it to behave that way. Changed the runtest perl
2077 script to read through the entire script once to detect and set these
2078 variables, reset to the beginning of the script, and then run through
2079 the script parsing/test process like normal.
2081 TL/02 The BSD's have an arc4random API. One of the functions to induce
2082 adding randomness was arc4random_stir(), but it has been removed in
2083 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2084 function when detected.
2086 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2087 cause callback expansion.
2089 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2090 syntax errors in an expansion can be treated as a string instead of
2091 logging or causing an error, due to the internal use of bool_lax
2092 instead of bool when processing it.
2094 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2095 server certificates when making smtp deliveries.
2097 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2099 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2101 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2103 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2104 Merged patch from Sebastian Wiedenroth.
2106 JH/05 Fix results-pipe from transport process. Several recipients, combined
2107 with certificate use, exposed issues where response data items split
2108 over buffer boundaries were not parsed properly. This eventually
2109 resulted in duplicates being sent. This issue only became common enough
2110 to notice due to the introduction of connection certificate information,
2111 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2113 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2114 size buffer was used, resulting in syntax errors when an expansion
2117 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2118 version 3.3.6 or later.
2120 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2121 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2122 both become "event_action", the variables become $event_name, $event_data
2123 and $event_defer_errno. There is a new variable $verify_mode, usable in
2124 routers, transports and related events. The tls:cert event is now also
2125 raised for inbound connections, if the main configuration event_action
2128 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2129 early OCSP support, but no stapling (appears to be less than 1.0.0).
2131 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2132 server certificate names available under the smtp transport option
2133 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2136 JH/10 Time-related extraction expansions from certificates now use the main
2137 option "timezone" setting for output formatting, and are consistent
2138 between OpenSSL and GnuTLS compilations. Bug 1541.
2140 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2141 encoded parameter in the incoming message. Bug 1558.
2143 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2144 include certificate info, eximon was claiming there were spoolfile
2147 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2149 JH/14 Log delivery-related information more consistently, using the sequence
2150 "H=<name> [<ip>]" wherever possible.
2152 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2153 are problematic for Debian distribution, omit them from the release
2156 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2158 JH/16 Fix string representation of time values on 64bit time_t architectures.
2161 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2162 output list separator was used.
2167 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2168 checkers that were complaining about end of non-void function with no
2171 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2172 This was a regression introduced in 4.83 by another bugfix.
2174 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2176 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2177 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2183 TF/01 Correctly close the server side of TLS when forking for delivery.
2185 When a message was received over SMTP with TLS, Exim failed to clear up
2186 the incoming connection properly after forking off the child process to
2187 deliver the message. In some situations the subsequent outgoing
2188 delivery connection happened to have the same fd number as the incoming
2189 connection previously had. Exim would try to use TLS and fail, logging
2190 a "Bad file descriptor" error.
2192 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2193 utilities have not been installed.
2195 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2196 temporary space as the ACL may create new global variables.
2198 TL/01 LDAP support uses per connection or global context settings, depending
2199 upon the detected version of the libraries at build time.
2201 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2202 to extract and use the src ip:port in logging and expansions as if it
2203 were a direct connection from the outside internet. PPv2 support was
2204 updated based on HAProxy spec change in May 2014.
2206 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2208 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2209 Properly escape header and check for NULL return.
2211 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2214 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2216 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2217 characters in header names, implemented as a verify condition.
2218 Contributed by Michael Fischer v. Mollard.
2220 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2221 results permerror and temperror. Previous values are deprecated but
2222 still accepted. In a future release, err_perm and err_temp will be
2223 completely removed, which will be a backward incompatibility if the
2224 ACL tests for either of these two old results. Patch contributed by
2225 user bes-internal on the mailing list.
2227 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2229 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2230 selectors, in both main and reject logs.
2232 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2235 JH/07 Add malware type "sock" for talking to simple daemon.
2237 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2239 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2240 routers/transports under cutthrough routing.
2242 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2243 numbers. Touch up "bool" conditional to keep the same definition.
2245 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2247 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2249 JH/12 Expand items in router/transport headers_add or headers_remove lists
2250 individually rather than the list as a whole. Bug 1452.
2252 Required for reasonable handling of multiple headers_ options when
2253 they may be empty; requires that headers_remove items with embedded
2254 colons must have them doubled (or the list-separator changed).
2256 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2257 view the policy declared in the DMARC record. Currently, $dmarc_status
2258 is a combined value of both the record presence and the result of the
2261 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2263 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2264 dnslookup router and the smtp transport (applying to the forward
2267 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2268 of ldap servers used for a specific lookup. Patch provided by Heiko
2271 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2272 New variable $lookup_dnssec_authenticated for observability.
2274 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2275 Patch submitted by Lars Timman.
2277 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2279 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2280 Requires trusted mode and valid format message id, aborts otherwise.
2281 Patch contributed by Heiko Schlichting.
2283 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2284 certextract with support for various fields. Bug 1358.
2286 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2287 is requested by default, modifiable by smtp transport option
2290 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2291 operate on certificate variables to give certificate fingerprints
2292 Also new ${sha256:cert_variable}.
2294 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2296 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2297 Christian Aistleitner.
2299 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2301 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2302 file. Patch from Wolfgang Breyha.
2304 JH/25 Expand the coverage of the delivery $host and $host_address to
2305 client authenticators run in verify callout. Bug 1476.
2307 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2308 align with daemon_smtp_ports. Bug 72.
2310 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2311 support and error reporting did not work properly.
2313 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2314 and is readable. Patch from Andrew Colin Kissa.
2316 TL/14 Enhance documentation of ${run expansion and how it parses the
2317 commandline after expansion, particularly in the case when an
2318 unquoted variable expansion results in an empty value.
2320 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2322 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2323 by renaming away from it. Addresses GH issue 15, reported by
2326 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2328 TL/15 SECURITY: prevent double expansion in math comparison functions
2329 (can expand unsanitized data). Not remotely exploitable.
2336 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2338 PP/02 Make -n do something, by making it not do something.
2339 When combined with -bP, the name of an option is not output.
2341 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2344 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2345 $sender_host_name and config options to manage this, and basic check
2348 PP/05 DSCP support for outbound connections and control modifier for inbound.
2350 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2351 (Only plugin which currently uses this is kerberos4, which nobody should
2352 be using, but we should make it available and other future plugins might
2353 conceivably use it, even though it would break NAT; stuff *should* be
2354 using channel bindings instead).
2356 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2357 name; added for Sendmail compatibility; requires admin caller.
2358 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2359 just ignore it); requires trusted caller.
2360 Also parse but ignore: -Ac -Am -X<logfile>
2363 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2365 TL/02 Add +smtp_confirmation as a default logging option.
2367 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2368 Patch by Magnus Holmgren from 2007-02-20.
2370 TL/04 Bugzilla 1281 - Spec typo.
2371 Bugzilla 1283 - Spec typo.
2372 Bugzilla 1290 - Spec grammar fixes.
2374 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2376 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2378 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2379 mailing list by by Dmitry Isaikin.
2381 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2383 JH/02 Support "G" suffix to numbers in ${if comparisons.
2385 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2387 NM/01 Bugzilla 1197 - Spec typo
2388 Bugzilla 1196 - Spec examples corrections
2390 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2392 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2393 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2396 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2397 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2399 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2400 "acl {{name}{arg}...}", and optional args on acl condition
2403 JH/05 Permit multiple router/transport headers_add/remove lines.
2405 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2407 JH/07 Avoid using a waiting database for a single-message-only transport.
2408 Performance patch from Paul Fisher. Bugzilla 1262.
2410 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2413 JH/09 Add $headers_added variable, with content from use of ACL modifier
2414 add_header (but not yet added to the message). Bugzilla 199.
2416 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2417 Pulled from Bugzilla 817 by Wolfgang Breyha.
2419 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2421 (nb: this is the same fix as in Exim 4.80.1)
2423 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2426 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2429 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2431 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2432 advertise SMTP AUTH mechanism to us, instead of a generic
2433 protocol violation error. Also, make Exim more robust to bad
2434 data from the Dovecot auth socket.
2436 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2438 When a queue runner is handling a message, Exim first routes the
2439 recipient addresses, during which it prunes them based on the retry
2440 hints database. After that it attempts to deliver the message to
2441 any remaining recipients. It then updates the hints database using
2444 So if a recipient address works intermittently, it can get repeatedly
2445 deferred at routing time. The retry hints record remains fresh so the
2446 address never reaches the final cutoff time.
2448 This is a fairly common occurrence when a user is bumping up against
2449 their storage quota. Exim had some logic in its local delivery code
2450 to deal with this. However it did not apply to per-recipient defers
2451 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2453 This change adds a proper retry rule check during routing so that the
2454 final cutoff time is checked against the message's age. We only do
2455 this check if there is an address retry record and there is not a
2456 domain retry record; this implies that previous attempts to handle
2457 the address had the retry_use_local_parts option turned on. We use
2458 this as an approximation for the destination being like a local
2459 delivery, as in LMTP.
2461 I suspect this new check makes the old local delivery cutoff check
2462 redundant, but I have not verified this so I left the code in place.
2464 TF/02 Correct gecos expansion when From: is a prefix of the username.
2466 Test 0254 submits a message to Exim with the header
2470 When I ran the test suite under the user fanf2, Exim expanded
2471 the header to contain my full name, whereas it should have added
2472 a Resent-Sender: header. It erroneously treats any prefix of the
2473 username as equal to the username.
2475 This change corrects that bug.
2477 GF/01 DCC debug and logging tidyup
2478 Error conditions log to paniclog rather than rejectlog.
2479 Debug lines prefixed by "DCC: " to remove any ambiguity.
2481 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2483 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2484 Bug spotted by Jeremy Harris; was flawed since initial commit.
2485 Would have resulted in OCSP responses post-SNI triggering an Exim
2486 NULL dereference and crash.
2488 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2490 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2491 Bug detection, analysis and fix by Samuel Thibault.
2492 Bugzilla 1331, Debian bug #698092.
2494 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2496 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2497 Server implementation by Todd Lyons, client by JH.
2498 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2499 config variable "prdr_enable" controls whether the server
2500 advertises the facility. If the client requests PRDR a new
2501 acl_data_smtp_prdr ACL is called once for each recipient, after
2502 the body content is received and before the acl_smtp_data ACL.
2503 The client is controlled by both of: a hosts_try_prdr option
2504 on the smtp transport, and the server advertisement.
2505 Default client logging of deliveries and rejections involving
2506 PRDR are flagged with the string "PRDR".
2508 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2509 fclose(). Diagnosis by Todd Lyons.
2511 PP/17 Update configure.default to handle IPv6 localhost better.
2512 Patch by Alain Williams (plus minor tweaks).
2515 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2516 This is now consistent with GnuTLS, and is now documented: the
2517 previous undocumented portable approach to treating the option as
2518 unset was to force an expansion failure. That still works, and
2519 an empty string is now equivalent.
2521 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2522 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2523 not performing validation itself.
2525 PP/20 Added force_command boolean option to pipe transport.
2526 Patch from Nick Koston, of cPanel Inc.
2528 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2531 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2533 PP/21 Fix eximon continuous updating with timestamped log-files.
2534 Broken in a format-string cleanup in 4.80, missed when I repaired the
2535 other false fix of the same issue.
2536 Report and fix from Heiko Schlichting.
2539 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2540 Report from Prashanth Katuri.
2542 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2543 It's SecureTransport, so affects any MacOS clients which use the
2544 system-integrated TLS libraries, including email clients.
2546 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2547 using a MIME ACL for non-SMTP local injection.
2548 Report and assistance in diagnosis by Warren Baker.
2550 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2552 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2554 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2555 last id that failed so it may be referenced in subsequent ACL's.
2557 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2560 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2561 ldap library initialization, allowing self-signed CA's to be
2562 used. Also properly sets require_cert option later in code by
2563 using NULL (global ldap config) instead of ldap handle (per
2564 session). Bug diagnosis and testing by alxgomz.
2566 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2567 the src/util/ subdirectory.
2569 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2570 renamed to Transport Post Delivery Action by Jeremy Harris, as
2573 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2574 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2575 redis_servers = needs to be configured which will be used by the redis
2576 lookup. Patch from Warren Baker, of The Packet Hub.
2578 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2580 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2581 hostname or reverse DNS when processing a host list. Used suggestions
2582 from multiple comments on this bug.
2584 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2586 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2587 Missed a few lines, added it to make the runtest require no keyboard
2590 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2591 contains upper case chars. Make router use caseful_local_part.
2593 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2594 support when GnuTLS has been built with p11-kit.
2600 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2602 This, or similar/improved, will also be change PP/11 of 4.82.
2608 PP/01 Handle short writes when writing local log-files.
2609 In practice, only affects FreeBSD (8 onwards).
2610 Bugzilla 1053, with thanks to Dmitry Isaikin.
2612 NM/01 Bugzilla 949 - Documentation tweak
2614 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2617 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2619 PP/02 Implemented gsasl authenticator.
2621 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2623 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2624 `pkg-config foo` for cflags/libs.
2626 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2627 with rest of GSASL and with heimdal_gssapi.
2629 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2630 `pkg-config foo` for cflags/libs for the TLS implementation.
2632 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2633 properties get this fed in as external SSF. A number of robustness
2634 and debugging improvements to the cyrus_sasl authenticator.
2636 PP/08 cyrus_sasl server now expands the server_realm option.
2638 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2639 Patch by Jeremy Harris.
2641 PP/10 Added dbmjz lookup type.
2643 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2645 PP/12 MAIL args handles TAB as well as SP, for better interop with
2646 non-compliant senders.
2647 Analysis and variant patch by Todd Lyons.
2649 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2650 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2651 Patch from Dirk Mueller <dmueller@suse.com>
2653 PP/13 tls_peerdn now print-escaped for spool files.
2654 Observed some $tls_peerdn in wild which contained \n, which resulted
2655 in spool file corruption.
2657 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2658 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2659 or write after TLS renegotiation, which otherwise led to messages
2662 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2663 as a tracking header (ie: a signed header comes before the signature).
2664 Patch from Wolfgang Breyha.
2666 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2667 comma-sep list; embedded commas doubled.
2669 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2671 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2673 Report and patch from Dmitry Banschikov.
2675 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2676 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2677 failures. We appear to now support TLS1.1+ with Exim.
2679 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2680 lets Exim select keys and certificates based upon TLS SNI from client.
2681 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2682 before an outbound SMTP session. New log_selector, +tls_sni.
2684 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2685 NULL dereference. Report and patch from Alun Jones.
2687 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2688 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2689 Not seeing resolver debug output on NetBSD, but suspect this is a
2690 resolver implementation change.
2692 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2693 Left warnings. Added "eximon gdb" invocation mode.
2695 PP/21 Defaulting "accept_8bitmime" to true, not false.
2697 PP/22 Added -bw for inetd wait mode support.
2699 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2700 locate the relevant includes and libraries. Made this the default.
2702 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2703 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2705 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2706 This may cause build issues on older platforms.
2708 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2709 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2710 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2711 Added SNI support via GnuTLS too.
2712 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2714 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2716 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2717 Applied second patch from Janne, implementing suggestion to default
2718 multiple-strings-in-record handling to match SPF spec.
2720 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2722 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2723 read-only, out of scope).
2724 Patch from Wolfgang Breyha, report from Stuart Northfield.
2726 PP/29 Fix three issues highlighted by clang analyser static analysis.
2727 Only crash-plausible issue would require the Cambridge-specific
2728 iplookup router and a misconfiguration.
2729 Report from Marcin Mirosław.
2731 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2733 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2734 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2735 As part of this, removing so much warning spew let me fix some minor
2736 real issues in debug logging.
2738 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2739 assignment on my part. Fixed.
2741 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2742 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2743 Janne Snabb (who went above and beyond: thank you).
2745 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2746 string otherwise requires a connection and a bunch more work and it's
2747 relatively easy to get wrong. Should also expose TLS library linkage
2750 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2751 64-bit ${eval} (JH/03).
2753 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2754 GNU libc to support some of the 64-bit stuff, should not lead to
2755 conflicts. Defined before os.h is pulled in, so if a given platform
2756 needs to override this, it can.
2758 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2759 protection layer was required, which is not implemented.
2760 Bugzilla 1254, patch from Wolfgang Breyha.
2762 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2763 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2764 tls_dhparam take prime identifiers. Also unbreak combination of
2765 OpenSSL+DH_params+TLSSNI.
2767 PP/39 Disable SSLv2 by default in OpenSSL support.
2773 PP/01 Solaris build fix for Oracle's LDAP libraries.
2774 Bugzilla 1109, patch from Stephen Usher.
2776 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2778 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2781 TF/02 Fix a couple more cases where we did not log the error message
2782 when unlink() failed. See also change 4.74-TF/03.
2784 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2785 lock up or crash if it happened to be inside a call to libc when it
2786 got a SIGUSR1 from exiwhat.
2788 The SIGUSR1 handler appends the current process status to the process
2789 log which is later printed by exiwhat. It used to use the general
2790 purpose logging code to do this, but several functions it calls are
2791 not safe for signals.
2793 The new output code in the SIGUSR1 handler is specific to the process
2794 log, and simple enough that it's easy to inspect for signal safety.
2795 Removing some special cases also simplifies the general logging code.
2796 Removing the spurious timestamps from the process log simplifies
2799 TF/04 Improved ratelimit ACL condition.
2801 The /noupdate option has been deprecated in favour of /readonly which
2802 has clearer semantics. The /leaky, /strict, and /readonly update modes
2803 are mutually exclusive. The update mode is no longer included in the
2804 database key; it just determines when the database is updated. (This
2805 means that when you upgrade Exim will forget old rate measurements.)
2807 Exim now checks that the per_* options are used with an update mode that
2808 makes sense for the current ACL. For example, when Exim is processing a
2809 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2810 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2811 must specify per_mail/readonly. If you omit the update mode it defaults to
2812 /leaky where that makes sense (as before) or /readonly where required.
2814 The /noupdate option is now undocumented but still supported for
2815 backwards compatibility. It is equivalent to /readonly except that in
2816 ACLs where /readonly is required you may specify /leaky/noupdate or
2817 /strict/noupdate which are treated the same as /readonly.
2819 A useful new feature is the /count= option. This is a generalization
2820 of the per_byte option, so that you can measure the throughput of other
2821 aggregate values. For example, the per_byte option is now equivalent
2822 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2824 The per_rcpt option has been generalized using the /count= mechanism
2825 (though it's more complicated than the per_byte equivalence). When it is
2826 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2827 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2828 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2829 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2830 Note that using per_rcpt with a non-readonly update mode in more than
2831 one ACL will cause the recipients to be double-counted. (The per_mail
2832 and per_byte options don't have this problem.)
2834 The handling of very low rates has changed slightly. If the computed rate
2835 is less than the event's count (usually one) then this event is the first
2836 after a long gap. In this case the rate is set to the same as this event's
2837 count, so that the first message of a spam run is counted properly.
2839 The major new feature is a mechanism for counting the rate of unique
2840 events. The new per_addr option counts the number of different
2841 recipients that someone has sent messages to in the last time period. It
2842 behaves like per_rcpt if all the recipient addresses are different, but
2843 duplicate recipient addresses do not increase the measured rate. Like
2844 the /count= option this is a general mechanism, so the per_addr option
2845 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2846 example, measure the rate that a client uses different sender addresses
2847 with the options per_mail/unique=$sender_address. There are further
2848 details in the main documentation.
2850 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2852 TF/06 Removed a few PCRE remnants.
2854 TF/07 Automatically extract Exim's version number from tags in the git
2855 repository when doing development or release builds.
2857 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2858 Bugzilla 879. Patch from Paul Fisher.
2860 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2861 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2864 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2866 PP/05 Variable $av_failed, true if the AV scanner deferred.
2867 Bugzilla 1078. Patch from John Horne.
2869 PP/06 Stop make process more reliably on build failure.
2870 Bugzilla 1087. Patch from Heiko Schlittermann.
2872 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2873 Bugzilla 1089. Patch from Heiko Schlittermann.
2875 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2876 Bugzilla 1131. Patch from Holger Weiß.
2878 PP/09 Handle IPv6 addresses with SPF.
2879 Bugzilla 860. Patch from Wolfgang Breyha.
2881 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2883 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2886 PP/11 match_* no longer expand right-hand-side by default.
2887 New compile-time build option, EXPAND_LISTMATCH_RHS.
2888 New expansion conditions, "inlist", "inlisti".
2890 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2892 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2894 PP/14 fix log_write() format string regression from TF/03.
2895 Bugzilla 1152. Patch from Dmitry Isaikin.
2901 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2903 PP/02 Harmonised TLS library version reporting; only show if debugging.
2904 Layout now matches that introduced for other libraries in 4.74 PP/03.
2906 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2908 PP/04 New "dns_use_edns0" global option.
2910 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2913 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2914 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2916 TK/01 Updated PolarSSL code to 0.14.2.
2917 Bugzilla 1097. Patch from Andreas Metzler.
2919 PP/07 Catch divide-by-zero in ${eval:...}.
2920 Fixes bugzilla 1102.
2922 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2925 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2926 format-string attack -- SECURITY: remote arbitrary code execution.
2928 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2929 time unintentionally subject to list matching rules, letting the header
2930 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2931 arbitrary string expansion). This allowed for information disclosure.
2933 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2934 INT_MIN/-1 -- value coerced to INT_MAX.
2940 NM/01 Workaround for PCRE version dependency in version reporting
2943 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2944 This fixes portability to compilers other than gcc, notably
2945 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2947 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2948 makefiles for portability to HP-UX and POSIX correctness.
2950 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2951 Also via indented variable definition in the Makefile.
2952 (Debugging by Oliver Heesakkers).
2954 PP/02 Restore caching of spamd results with expanded spamd_address.
2955 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2957 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2958 Improves build reliability. Fix from: Frank Elsner
2960 NM/02 Fix wide character breakage in the rfc2047 coding
2961 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2963 NM/03 Allow underscore in dnslist lookups
2964 Fixes bug 1026. Patch from Graeme Fowler
2966 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2967 Code patches from Adam Ciarcinski of NetBSD.
2969 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2972 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2973 is logged, to avoid truncation. Patch from John Horne.
2975 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2976 Patch from Jakob Hirsch.
2978 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2979 SQL string expansion failure details.
2980 Patch from Andrey Oktyabrski.
2982 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2983 Patch from Simon Arlott.
2985 PP/09 New lookups functionality failed to compile on old gcc which rejects
2986 extern declarations in function scope.
2987 Patch from Oliver Fleischmann
2989 PP/10 Use sig_atomic_t for flags set from signal handlers.
2990 Check getgroups() return and improve debugging.
2991 Fixed developed for diagnosis in bug 927 (which turned out to be
2994 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2995 Patch from Mark Zealey.
2997 PP/12 Bugzilla 1056: Improved spamd server selection.
2998 Patch from Mark Zealey.
3000 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3001 Based on patch from Heiko Schlittermann.
3003 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3004 Patch from Uwe Doering, sign-off by Michael Haardt.
3006 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3007 variable declaration deep within a block. Bug and patch from
3010 PP/15 lookups-Makefile IRIX compatibility coercion.
3012 PP/16 Make DISABLE_DKIM build knob functional.
3014 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3015 Patch by Simon Arlott
3017 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3018 variable argument macros. Our copy now differs from upstream.
3024 TF/01 Failure to get a lock on a hints database can have serious
3025 consequences so log it to the panic log.
3027 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3028 controlled using the smtp_confirmation log selector.
3030 TF/03 Include the error message when we fail to unlink a spool file.
3032 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3033 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3034 for maintaining out-of-tree patches for some time.
3036 PP/01 Bugzilla 139: Documentation and portability issues.
3037 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3038 Handle per-OS dynamic-module compilation flags.
3040 PP/02 Let /dev/null have normal permissions.
3041 The 4.73 fixes were a little too stringent and complained about the
3042 permissions on /dev/null. Exempt it from some checks.
3043 Reported by Andreas M. Kirchwitz.
3045 PP/03 Report version information for many libraries, including
3046 Exim version information for dynamically loaded libraries. Created
3047 version.h, now support a version extension string for distributors
3048 who patch heavily. Dynamic module ABI change.
3050 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3051 privilege escalation vulnerability whereby the Exim run-time user
3052 can cause root to append content of the attacker's choosing to
3055 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3058 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3059 If dropping privileges for untrusted macros, we disabled normal logging
3060 on the basis that it would fail; for the Exim run-time user, this is not
3061 the case, and it resulted in successful deliveries going unlogged.
3062 Fixed. Reported by Andreas Metzler.
3068 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3069 only prepend for the Resent-* case. Fixes regression introduced in
3070 Exim 4.70 by NM/22 for Bugzilla 607.
3072 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3073 increasing numbers of administrators be bitten by this.
3075 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3077 PP/03 Bugzilla 994: added openssl_options main configuration option.
3079 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3081 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3083 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3085 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3086 without a peer certificate, leading to a segfault because of an
3087 assumption that peers always have certificates. Be a little more
3088 paranoid. Problem reported by Martin Tscholak.
3090 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3091 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3092 NB: ClamAV planning to remove STREAM in "middle of 2010".
3093 CL also introduces -bmalware, various -d+acl logging additions and
3094 more caution in buffer sizes.
3096 PP/09 Implemented reverse_ip expansion operator.
3098 PP/10 Bugzilla 937: provide a "debug" ACL control.
3100 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3102 PP/12 Bugzilla 973: Implement --version.
3104 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3106 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3108 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3110 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3111 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3112 ignore trailing whitespace.
3114 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3116 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3119 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3120 Notification from Dr Andrew Aitchison.
3122 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3123 ExtendedDetectionInfo response format.
3124 Notification from John Horne.
3126 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3129 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3130 XSL and documented dependency on system catalogs, with examples of how
3133 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3136 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3137 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3138 configuration file which is writeable by the Exim user or group.
3140 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3141 of configuration files to cover files specified with the -C option if
3142 they are going to be used with root privileges, not just the default
3145 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3146 option (effectively making it always true).
3148 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3149 files to be used while preserving root privileges.
3151 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3152 that rogue child processes cannot use them.
3154 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3155 run-time user, instead of root.
3157 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3158 Exim run-time user without dropping privileges.
3160 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3161 result string, instead of calling string_vformat() twice with the same
3164 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3165 for other users. Others should always drop root privileges if they use
3166 -C on the command line, even for a whitelisted configure file.
3168 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3170 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3176 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3177 $data_path, and $header_path variables; fixed documentation bugs and
3180 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3181 exipick to access non-standard spools, including the "frozen" queue
3184 NM/01 Bugzilla 965: Support mysql stored procedures.
3185 Patch from Alain Williams
3187 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3189 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3190 Patch from Andreas Metzler
3192 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3193 Patch from Kirill Miazine
3195 NM/05 Bugzilla 671: Added umask to procmail example.
3197 JJ/03 installed exipick 20100323.0, fixing doc bug
3199 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3200 directory. Notification and patch from Dan Rosenberg.
3202 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3204 TK/02 Improve log output when DKIM signing operation fails.
3206 MH/01 Treat the transport option dkim_domain as a colon separated
3207 list, not as a single string, and sign the message with each element,
3208 omitting multiple occurences of the same signer.
3210 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3211 Bugzilla 985, 986. Patch by Simon Arlott
3213 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3214 Patch by Simon Arlott
3216 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3217 MBX locking. Notification from Dan Rosenberg.
3223 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3225 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3227 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3229 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3231 NM/04 Bugzilla 915: Flag broken perl installation during build.
3237 TK/01 Added patch by Johannes Berg that expands the main option
3238 "spamd_address" if it starts with a dollar sign.
3240 TK/02 Write list of recipients to X-Envelope-Sender header when building
3241 the mbox-format spool file for content scanning (suggested by Jakob
3244 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3245 (http://www.dcc-servers.net/) support via dccifd. Activated by
3246 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3248 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3249 by Mark Daniel Reidel <mr@df.eu>.
3251 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3252 When building exim an external PCRE library is now needed -
3253 PCRE is a system library on the majority of modern systems.
3254 See entry on PCRE_LIBS in EDITME file.
3256 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3257 conversation. Added nologin parameter to request.
3258 Patch contributed by Kirill Miazine.
3260 TF/01 Do not log submission mode rewrites if they do not change the address.
3262 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3264 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3265 log files in place. Contributed by Roberto Lima.
3267 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3269 TF/03 Bugzilla 615: When checking the local_parts router precondition
3270 after a local_part_suffix or local_part_prefix option, Exim now
3271 does not use the address's named list lookup cache, since this
3272 contains cached lookups for the whole local part.
3274 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3275 Robert Millan. Documentation is in experimental-spec.txt.
3277 TF/04 Bugzilla 668: Fix parallel build (make -j).
3279 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3281 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3282 Patch provided by Jan Srzednicki.
3284 TF/05 Leading white space used to be stripped from $spam_report which
3285 wrecked the formatting. Now it is preserved.
3287 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3288 that they are available at delivery time.
3290 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3292 TF/08 TLS error reporting now respects the incoming_interface and
3293 incoming_port log selectors.
3295 TF/09 Produce a more useful error message if an SMTP transport's hosts
3296 setting expands to an empty string.
3298 NM/06 Bugzilla 744: EXPN did not work under TLS.
3299 Patch provided by Phil Pennock.
3301 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3302 Patch provided by Richard Godbee.
3304 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3305 acl_smtp_notquit, added index entry.
3307 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3308 Patch provided by Eugene Bujak.
3310 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3311 accept(). Patch provided by Maxim Dounin.
3313 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3314 Patch provided by Phil Pennock.
3316 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3318 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3319 Patch provided by Brad "anomie" Jorsch.
3321 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3322 Patch provided by Dean Brooks.
3324 TK/05 Add native DKIM support (does not depend on external libraries).
3326 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3327 Patch provided by Graeme Fowler.
3329 NM/16 Bugzilla 851: Documentation example syntax fix.
3331 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3333 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3336 NM/19 Bugzilla 745: TLS version reporting.
3337 Patch provided by Phil Pennock.
3339 NM/20 Bugzilla 167: bool: condition support.
3340 Patch provided by Phil Pennock.
3342 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3343 clients. Patch provided by Phil Pennock.
3345 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3346 Patch provided by Brad "anomie" Jorsch.
3348 NM/23 Bugzilla 687: Fix misparses in eximstats.
3349 Patch provided by Heiko Schlittermann.
3351 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3352 Patch provided by Heiko Schlittermann.
3354 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3355 plus update to original patch.
3357 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3359 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3360 Patch provided by David Brownlee.
3362 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3364 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3366 NM/30 Bugzilla 888: TLS documentation bugfixes.
3368 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3370 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3371 Unlike the original bugzilla I have changed all shell scripts in src tree.
3373 NM/33 Bugzilla 898: Transport filter timeout fix.
3374 Patch by Todd Rinaldo.
3376 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3377 Patch by Serge Demonchaux.
3379 NM/35 Bugzilla 39: Base64 decode bug fixes.
3380 Patch by Jakob Hirsch.
3382 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3384 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3386 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3388 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3394 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3395 ALT-N's libdkim that I have put here:
3396 http://duncanthrax.net/exim-experimental/
3398 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3399 were called 'true' and it seems that C99 defines that as a reserved
3400 keyword to be used with 'bool' variable types. That means you could
3401 not include C99-style headers which use bools without triggering
3402 build errors in sieve.c.
3404 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3405 as mailq or other aliases. Changed the --help handling significantly
3406 to do whats expected. exim_usage() emits usage/help information.
3408 SC/01 Added the -bylocaldomain option to eximstats.
3410 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3412 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3414 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3420 PH/01 Another patch from the Sieve maintainer.
3422 PH/02 When an IPv6 address is converted to a string for single-key lookup
3423 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3424 dots are used instead of colons so that keys in lsearch files need not
3425 contain colons. This was done some time before quoting was made available
3426 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3427 (notated using the quote facility) so as to distinguish them from IPv4
3428 keys. This meant that lookups for IP addresses in host lists did not work
3429 for iplsearch lookups.
3431 This has been fixed by arranging for IPv6 addresses to be expressed with
3432 colons if the lookup type is iplsearch. This is not incompatible, because
3433 previously such lookups could never work.
3435 The situation is now rather anomalous, since one *can* have colons in
3436 ordinary lsearch keys. However, making the change in all cases is
3437 incompatible and would probably break a number of configurations.
3439 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3442 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3443 conversion specification without a maximum field width, thereby enabling
3444 a rogue spamd server to cause a buffer overflow. While nobody in their
3445 right mind would setup Exim to query an untrusted spamd server, an
3446 attacker that gains access to a server running spamd could potentially
3447 exploit this vulnerability to run arbitrary code as the Exim user.
3449 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3450 $primary_hostname instead of what libspf2 thinks the hosts name is.
3452 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3453 a directory entry by the name of the lookup key. Previously, if a
3454 symlink pointed to a non-existing file or a file in a directory that
3455 Exim lacked permissions to read, a lookup for a key matching that
3456 symlink would fail. Now it is enough that a matching directory entry
3457 exists, symlink or not. (Bugzilla 503.)
3459 PH/03 The body_linecount and body_zerocount variables are now exported in the
3462 PH/04 Added the $dnslist_matched variable.
3464 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3465 This means they are set thereafter only if the connection becomes
3468 PH/06 Added the client_condition to authenticators so that some can be skipped
3469 by clients under certain conditions.
3471 PH/07 The error message for a badly-placed control=no_multiline_responses left
3472 "_responses" off the end of the name.
3474 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3476 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3477 (without spaces) instead of just copying the configuration text.
3479 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3481 PH/11 Added $max_received_linelength.
3483 PH/12 Added +ignore_defer and +include_defer to host lists.
3485 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3486 way in which PCRE > 7.0 is built.
3488 PH/14 Implemented queue_only_load_latch.
3490 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3491 MAIL command. The effect was to mangle the value on 64-bit systems.
3493 PH/16 Another patch from the Sieve maintainer.
3495 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3497 PH/18 If a system quota error occurred while trying to create the file for
3498 a maildir delivery, the message "Mailbox is full" was not appended to the
3499 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3500 only to a quota excession during the actual writing of the file.
3502 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3503 characters?) which causes problems in log lines. The DN values are now
3504 passed through string_printing() before being added to log lines.
3506 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3507 and InterBase are left for another time.)
3509 PH/21 Added message_body_newlines option.
3511 PH/22 Guard against possible overflow in moan_check_errorcopy().
3513 PH/23 POSIX allows open() to be a macro; guard against that.
3515 PH/24 If the recipient of an error message contained an @ in the local part
3516 (suitably quoted, of course), incorrect values were put in $domain and
3517 $local_part during the evaluation of errors_copy.
3523 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3524 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3527 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3528 issue a MAIL command.
3530 PH/02 In an ACL statement such as
3532 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3534 if a client was not listed at all, or was listed with a value other than
3535 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3536 the condition was not true (as it should be), so access was not denied.
3537 The bug was that the ! inversion was incorrectly passed on to the second
3538 item. This has been fixed.
3540 PH/03 Added additional dnslists conditions == and =& which are different from
3541 = and & when the dns lookup returns more than one IP address.
3543 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3544 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3546 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3547 FSYNC, which compiles an option called disable_fsync that allows for
3548 bypassing fsync(). The documentation is heavily laced with warnings.
3550 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3552 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3553 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3554 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3555 including adding "make clean"; (3) Added -fPIC when compiling the test
3556 dynamically loaded module, to get rid of a warning.
3558 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3559 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3560 = 0s. The bug is otherwise harmless.
3562 PH/07 There was a bug in the dovecot authenticator such that the value of
3563 $auth1 could be overwritten, and so not correctly preserved, after a
3564 successful authentication. This usually meant that the value preserved by
3565 the server_setid option was incorrect.
3567 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3569 PH/09 Installed PCRE release 7.0.
3571 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3572 run for batched SMTP input. It is now run at the start of every message
3573 in the batch. While fixing this I discovered that the process information
3574 (output by running exiwhat) was not always getting set for -bs and -bS
3575 input. This is fixed, and it now also says "batched" for BSMTP.
3577 PH/11 Added control=no_pipelining.
3579 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3580 patch, slightly modified), and move the expansion of helo_data till after
3581 the connection is made in the smtp transport (so it can use these
3584 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3586 PH/14 Added log_selector = +pid.
3588 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3590 PH/16 Add ${if forany and ${if forall.
3592 PH/17 Added dsn_from option to vary the From: line in DSNs.
3594 PH/18 Flush SMTP output before performing a callout, unless control =
3595 no_callout_flush is set.
3597 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3598 was true (the default) a successful delivery failed to delete the retry
3599 item, thus causing premature timeout of the address. The bug is now
3602 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3604 PH/21 Long custom messages for fakedefer and fakereject are now split up
3605 into multiline responses in the same way that messages for "deny" and
3606 other ACL rejections are.
3608 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3609 with slight modification.
3611 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3612 draft, changing the syntax and factoring some duplicate code".
3614 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3615 for deliveries of the second and subsequent messages over the same SMTP
3618 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3619 ${reduce, with only minor "tidies".
3621 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3623 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3624 expansion side effects.
3626 PH/27 When a message times out after an over-quota error from an Exim-imposed
3627 quota, the bounce message says "mailbox is full". This message was not
3628 being given when it was a system quota that was exceeded. It now should
3631 MH/03 Made $recipients available in local_scan(). local_scan() already has
3632 better access to the recipient list through recipients_list[], but
3633 $recipients can be useful in postmaster-provided expansion strings.
3635 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3636 in the case of a MAIL command with additional options following the
3637 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3638 were accidentally chopped off.
3640 PH/29 SMTP synchronization checks are implemented when a command is read -
3641 there is a check that no more input is waiting when there shouldn't be
3642 any. However, for some commands, a delay in an ACL can mean that it is
3643 some time before the response is written. In this time, more input might
3644 arrive, invalidly. So now there are extra checks after an ACL has run for
3645 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3646 pipelining has not been advertised.
3648 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3650 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3651 returned in the SMTP response when smtp_return_error_details was false.
3652 This has been fixed.
3654 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3655 instead of the C I/O that was originally supplied, because problems were
3656 reported on Solaris.
3658 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3659 Exim which did not show up earlier: it was assuming that a call to
3660 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3661 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3662 was a macro that became an assignment, so it seemed to work. This has
3663 changed to a proper function call with a void return, hence the compile
3664 error. Exim's code has been fixed.
3666 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3669 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3671 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3673 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3674 because it turns out to be too big or there is a timeout) there is no
3675 "Completed" line in the log. When some messages of this type were
3676 selected by exigrep, they were listed as "not completed". Others were
3677 picked up by some special patterns. I have improved the selection
3678 criteria to be more general.
3680 PH/38 The host_find_failed option in the manualroute router can now be set
3681 to "ignore", to completely ignore a host whose IP address cannot be
3682 found. If all hosts are ignored, the behaviour is controlled by the new
3683 host_all_ignored option.
3685 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3686 homing or because of multiple MX records with /mx) generated more than
3687 one IP address, and the following item turned out to be the local host,
3688 all the secondary addresses of the first item were incorrectly removed
3689 from the list, along with the local host and any following hosts (which
3690 is what is supposed to happen).
3692 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3693 whoever called Exim into the -H file. In the case of the daemon it was
3694 behaving confusingly. When first started, it used values for whoever
3695 started the daemon, but after a SIGHUP it used the Exim user (because it
3696 calls itself on a restart). I have changed the code so that it now always
3699 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3700 message are rejected with the same error (e.g. no authentication or bad
3701 sender address), and a DATA command is nevertheless sent (as can happen
3702 with PIPELINING or a stupid MUA), the error message that was given to the
3703 RCPT commands is included in the rejection of the DATA command. This is
3704 intended to be helpful for MUAs that show only the final error to their
3707 PH/42 Another patch from the Sieve maintainer.
3709 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3710 Eximstats - Fixed some broken HTML links and added missing column headers
3712 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3713 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3715 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3717 PH/43 Yet another patch from the Sieve maintainer.
3719 PH/44 I found a way to check for a TCP/IP connection going away before sending
3720 the response to the final '.' that terminates a message, but only in the
3721 case where the client has not sent further data following the '.'
3722 (unfortunately, this is allowed). However, in many cases there won't be
3723 any further data because there won't be any more messages to send. A call
3724 to select() can be used: if it shows that the input is "ready", there is
3725 either input waiting, or the socket has been closed. An attempt to read
3726 the next input character can distinguish the two cases. Previously, Exim
3727 would have sent an OK response which the client would never have see.
3728 This could lead to message repetition. This fix should cure that, at
3729 least in a lot of common cases.
3731 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3732 advertised in response to EHLO.
3738 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3739 fixed by 4.65/MH/01 (is this a record?) are fixed:
3741 (i) An empty string was always treated as zero by the numeric comparison
3742 operators. This behaviour has been restored.
3744 (ii) It is documented that the numeric comparison operators always treat
3745 their arguments as decimal numbers. This was broken in that numbers
3746 starting with 0 were being interpreted as octal.
3748 While fixing these problems I realized that there was another issue that
3749 hadn't been noticed. Values of message_size_limit (both the global option
3750 and the transport option) were treated as octal if they started with 0.
3751 The documentation was vague. These values are now always treated as
3752 decimal, and I will make that clear in the documentation.
3758 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3759 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3762 MH/01 Don't check that the operands of numeric comparison operators are
3763 integers when their expansion is in "skipping" mode (fixes bug
3764 introduced by 4.64-PH/07).
3766 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3767 child addresses, Exim now panics and dies. Previously, because the count
3768 is held in a short int, deliveries were likely to be lost. As such a
3769 large number of recipients for a single message is ridiculous
3770 (performance will be very, very poor), I have chosen to impose a limit
3771 rather than extend the field.
3777 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3778 leftover -K file (the existence of which was triggered by #402).
3779 While we were at it, introduced process PID as part of the -K
3780 filename. This should rule out race conditions when creating
3783 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3784 processing considerably. Previous code took too long for large mails,
3785 triggering a timeout which in turn triggers #401.
3787 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3788 in the DK code in transports.c. sendfile() is not really portable,
3789 hence the _LINUX specificness.
3791 TF/01 In the add_headers option to the mail command in an Exim filter,
3792 there was a bug that Exim would claim a syntax error in any
3793 header after the first one which had an odd number of characters
3796 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3797 callout verification, Exim cached a "reject" for the entire domain. This
3798 is correct for most verifications, but it is not correct for a recipient
3799 verification with use_sender or use_postmaster set, because in that case
3800 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3801 case of MAIL FROM:<> rejection from other early rejections (e.g.
3802 rejection of HELO). When verifying a recipient using a non-null MAIL
3803 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3804 Whatever the result of the callout, the value of the domain cache is
3805 left unchanged (for any other kind of callout, getting as far as trying
3806 RCPT means that the domain itself is ok).
3808 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3811 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3812 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3813 session, the daemon ignores ECONNECT errors and logs others; it now
3814 ignores EPIPE as well.
3816 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3817 (quoted-printable decoding).
3819 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3820 later the small subsequent patch to fix an introduced bug.
3822 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3824 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3826 PH/08 An error is now given if message_size_limit is specified negative.
3828 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3829 to be given (somewhat) arbitrary names.
3831 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3834 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3835 miscellaneous code fixes
3837 PH/10 Added the log_reject_target ACL modifier to specify where to log
3840 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3841 hostname. This is wrong, because it relates to the incoming message (and
3842 probably the interface on which it is arriving) and not to the outgoing
3843 callout (which could be using a different interface). This has been
3844 changed to use the value of the helo_data option from the smtp transport
3845 instead - this is what is used when a message is actually being sent. If
3846 there is no remote transport (possible with a router that sets up host
3847 addresses), $smtp_active_hostname is used.
3849 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3850 tweaks were necessary in order to get it to work (see also 21 below):
3851 (a) The code assumed that strncpy() returns a negative number on buffer
3852 overflow, which isn't the case. Replaced with Exim's string_format()
3854 (b) There were several signed/unsigned issues. I just did the minimum
3855 hacking in of casts. There is scope for a larger refactoring.
3856 (c) The code used strcasecmp() which is not a standard C function.
3857 Replaced with Exim's strcmpic() function.
3858 (d) The code set only $1; it now sets $auth1 as well.
3859 (e) A simple test gave the error "authentication client didn't specify
3860 service in request". It would seem that Dovecot has changed its
3861 interface. Fortunately there's a specification; I followed it and
3862 changed what the client sends and it appears to be working now.
3864 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3867 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3868 address A is aliased to B and C, where B exists and C does not. Without
3869 -v the output is "A verified" because verification stops after a
3870 successful redirection if more than one address is generated. However,
3871 with -v the child addresses are also verified. Exim was outputting "A
3872 failed to verify" and then showing the successful verification for C,
3873 with its parentage. It now outputs "B failed to verify", showing B's
3874 parentage before showing the successful verification of C.
3876 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3877 look up a TXT record in a specific list after matching in a combined
3880 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3881 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3882 they consult the DNS. I had assumed they would set it the way they
3883 wanted; and indeed my experiments on Linux seem to show that in some
3884 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3885 To be on the safe side, however, I have now made the interface to
3886 host_find_byname() similar to host_find_bydns(), with an argument
3887 containing the DNS resolver options. The host_find_byname() function now
3888 sets these options at its start, just as host_find_bydns() does. The smtp
3889 transport options dns_qualify_single and dns_search_parents are passed to
3890 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3891 of host_find_byname() use the default settings of RES_DEFNAMES
3892 (qualify_single) but not RES_DNSRCH (search_parents).
3894 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3895 spool_read_header() do less string testing, by means of a preliminary
3896 switch on the second character of optional "-foo" lines. (This is
3897 overdue, caused by the large number of possibilities that now exist.
3898 Originally there were few.) While I was there, I also converted the
3899 str(n)cmp tests so they don't re-test the leading "-" and the first
3900 character, in the hope this might squeeze out yet more improvement.
3902 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3903 flag allowing group syntax was set by the header_syntax check but not
3904 turned off, possible causing trouble later; (2) The flag was not being
3905 set at all for the header_verify test, causing "group"-style headers to
3906 be rejected. I have now set it in this case, and also caused header_
3907 verify to ignore an empty address taken from a group. While doing this, I
3908 came across some other cases where the code for allowing group syntax
3909 while scanning a header line wasn't quite right (mostly, not resetting
3910 the flag correctly in the right place). These bugs could have caused
3911 trouble for malformed header lines. I hope it is now all correct.
3913 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3914 with the "reply" argument non-NULL. The code, however (which originally
3915 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3916 but it didn't always do it. This confused somebody who was copying the
3917 code for some other use. I have removed all the tests.
3919 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3920 feature that was used to support insecure browsers during the U.S. crypto
3921 embargo. It requires special client support, and Exim is probably the
3922 only MTA that supported it -- and would never use it because real RSA is
3923 always available. This code has been removed, because it had the bad
3924 effect of slowing Exim down by computing (never used) parameters for the
3925 RSA_EXPORT functionality.
3927 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3928 authenticator to fail if there's a tab character in the incoming data
3929 (there should never be unless someone is messing about, as it's supposed
3930 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3931 if the connection is using TLS or if the remote IP is the same as the
3932 local IP, and the "valid-client-cert option" if a client certificate has
3935 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3936 authenticators. This can be used for authorization after authentication
3937 succeeds. (In the case of plaintext, it servers for both authentication
3940 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3941 if any retry times were supplied.
3943 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3944 connection, where there is no client IP address to check. In this
3945 situation, the verify now always succeeds.
3947 PH/25 Applied John Jetmore's -Mset patch.
3949 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3951 PH/27 In a string expansion for a processed (not raw) header when multiple
3952 headers of the same name were present, leading whitespace was being
3953 removed from all of them, but trailing whitespace was being removed only
3954 from the last one. Now trailing whitespace is removed from each header
3955 before concatenation. Completely empty headers in a concatenation (as
3956 before) are ignored.
3958 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3959 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3961 PH/29 [Removed. This was a change that I later backed out, and forgot to
3962 correct the ChangeLog entry (that I had efficiently created) before
3963 committing the later change.]
3965 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3966 address errors (4xx response to RCPT) over the same connection as other
3967 messages routed to the same hosts. Such deliveries are always "forced",
3968 so retry times are not inspected. This resulted in far too many retries
3969 for the affected addresses. The effect occurred only when there were more
3970 hosts than the hosts_max_try setting in the smtp transport when it had
3971 the 4xx errors. Those hosts that it had tried were not added to the list
3972 of hosts for which the message was waiting, so if all were tried, there
3973 was no problem. Two fixes have been applied:
3975 (i) If there are any address or message errors in an SMTP delivery, none
3976 of the hosts (tried or untried) are now added to the list of hosts
3977 for which the message is waiting, so the message should not be a
3978 candidate for sending over the same connection that was used for a
3979 successful delivery of some other message. This seems entirely
3980 reasonable: after all the message is NOT "waiting for some host".
3981 This is so "obvious" that I'm not sure why it wasn't done
3982 previously. Hope I haven't missed anything, but it can't do any
3983 harm, as the worst effect is to miss an optimization.
3985 (ii) If, despite (i), such a delivery is accidentally attempted, the
3986 routing retry time is respected, so at least it doesn't keep
3987 hammering the server.
3989 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3990 in ${readsocket because some servers need this prod.
3992 PH/32 Added some extra debug output when updating a wait-xxx database.
3994 PH/33 The hint "could be header name not terminated by colon", which has been
3995 given for certain expansion errors for a long time, was not being given
3996 for the ${if def:h_colon_omitted{... case.
3998 PH/34 The spec says: "With one important exception, whenever a domain list is
3999 being scanned, $domain contains the subject domain." There was at least
4000 one case where this was not true.
4002 PH/35 The error "getsockname() failed: connection reset by peer" was being
4003 written to the panic log as well as the main log, but it isn't really
4004 panic-worthy as it just means the connection died rather early on. I have
4005 removed the panic log writing for the ECONNRESET error when getsockname()
4008 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4009 runs only) independently of the message's sender address. This meant
4010 that, if the 4xx error was in fact related to the sender, a different
4011 message to the same recipient with a different sender could confuse
4012 things. In particular, this can happen when sending to a greylisting
4013 server, but other circumstances could also provoke similar problems.
4014 I have changed the default so that the retry time for these errors is now
4015 based a combination of the sender and recipient addresses. This change
4016 can be overridden by setting address_retry_include_sender=false in the
4019 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4020 remote server are returned as part of bounce messages. This was not
4021 happening for LMTP over a pipe (the lmtp transport), but now it is the
4022 same for both kinds of LMTP.
4024 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4025 in header lines that were in fact CNAMEs. This is no longer the case.
4027 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4028 and queue runs started by the daemon processed all messages. This has
4029 been fixed so that -R and -S can now usefully be given with -q<time>.
4031 PH/40 Import PCRE release 6.7 (fixes some bugs).
4033 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4035 PH/42 Give an error if -q is specified more than once.
4037 PH/43 Renamed the variables $interface_address and $interface_port as
4038 $received_ip_address and $received_port, to make it clear that these
4039 values apply to message reception, and not to the outgoing interface when
4040 a message is delivered. (The old names remain recognized, of course.)
4042 PH/44 There was no timeout on the connect() call when using a Unix domain
4043 socket in the ${readsocket expansion. There now is.
4045 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4046 be meaningful with "accept".
4048 SC/01 Eximstats V1.43
4049 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4051 SC/02 Eximstats V1.44
4052 Use a glob alias rather than an array ref in the generated
4053 parser. This improves both readability and performance.
4055 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4056 Collect SpamAssassin and rejection statistics.
4057 Don't display local sender or destination tables unless
4058 there is data to show.
4059 Added average volumes into the top table text output.
4061 SC/04 Eximstats V1.46
4062 Collect data on the number of addresses (recipients)
4063 as well as the number of messages.
4065 SC/05 Eximstats V1.47
4066 Added 'Message too big' to the list of mail rejection
4067 reasons (thanks to Marco Gaiarin).
4069 SC/06 Eximstats V1.48
4070 Mainlog lines which have GMT offsets and are too short to
4071 have a flag are now skipped.
4073 SC/07 Eximstats V1.49 (Alain Williams)
4074 Added the -emptyok flag.
4076 SC/08 Eximstats V1.50
4077 Fixes for obtaining the IP address from reject messages.
4079 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4080 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4081 whitespace changes from 4.64-PH/27
4083 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4086 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4087 are found, allow negative numbers in numeric criteria)
4089 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4091 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4092 to match changes made in 4.64-PH/43
4094 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4096 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4097 "domain" is actually an IP address, and force a failure. This locks out
4098 those revolvers/nameservers that support "A-for-A" lookups, in
4099 contravention of the specifications.
4101 PH/48 When a host name was looked up from an IP address, and the subsequent
4102 forward lookup of the name timed out, the host name was left in
4103 $sender_host_name, contrary to the specification.
4105 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4106 restricted to single-key lookups, Exim was not diagnosing an error if
4107 * or *@ was used with a query-style lookup.
4109 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4111 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4112 long ago, but noone interested enough thought of it. Let's just say that
4113 the "1.1" means that there are some new functions that weren't there at
4114 some point in the past.
4116 PH/51 Error processing for expansion failure of helo_data from an smtp
4117 transport during callout processing was broken.
4119 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4120 tested/used via the -bh/-bhc/-bs options.
4122 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4123 bug, fixed in subsequent PCRE releases).
4125 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4126 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4128 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4134 SC/01 Use a glob alias rather than an array ref in eximstats generated
4135 parser. This improves both readability and performance.
4137 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4138 Don't display local sender or destination tables in eximstats unless
4139 there is data to show.
4140 Added average volumes into the eximstats top table text output.
4142 SC/03 Collect data on the number of addresses (recipients) as well
4143 as the number of messages in eximstats.
4145 TF/01 Correct an error in the documentation for the redirect router. Exim
4146 does (usually) call initgroups() when daemonizing.
4148 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4149 with consistent privilege compared to when running as a daemon.
4151 TF/03 Note in the spec that $authenticated_id is not set for local
4152 submissions from trusted users.
4154 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4155 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4157 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4158 by adding some example configuration directives to the default
4159 configuration file. A little bit of work is required to uncomment the
4160 directives and define how usernames and passwords are checked, but
4161 there is now a framework to start from.
4163 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4164 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4165 without this. I don't know how relevant this is to other LDAP libraries.
4167 PH/02 Add the verb name to the "unknown ACL verb" error.
4169 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4171 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4173 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4174 directory not expanded when it should be if an expanded home directory
4175 was set for the address (which is overridden by the transport).
4177 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4180 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4181 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4182 because it is too late at that time, and has no effect.
4184 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4185 security issue with \' (bugzilla #107). I could not use the
4186 PQescapeStringConn() function, because it needs a PGconn value as one of
4189 PH/08 When testing addresses using -bt, indicate those final addresses that
4190 are duplicates that would not cause an additional delivery. At least one
4191 person was confused, thinking that -bt output corresponded to deliveries.
4192 (Suppressing duplicates isn't a good idea as you lose the information
4193 about possibly different redirections that led to the duplicates.)
4195 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4196 systems where poll() doesn't work, in particular OS X.
4198 PH/10 Added more information to debugging output for retry time not reached.
4200 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4201 operations in malware.c.
4203 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4206 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4207 syslog_duplication set false, log lines that would normally be written
4208 both the the main log and to the reject log were not written to syslog at
4211 PH/14 In the default configuration, change the use of "message" in ACL warn
4212 statements to "add_header".
4214 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4215 not followed by a command (e.g. "seen endif").
4217 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4218 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4221 PH/17 Added extra conditions to the default value of delay_warning_condition
4225 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4226 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4227 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4230 The Auto-Submitted: and various List- headers are standardised, whereas I
4231 don't think Precedence: ever was.
4233 PH/18 Refactored debugging code in route_finduser() to show more information,
4234 in particular, the error code if getpwnam() issues one.
4236 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4237 This is apparently needed in addition to the PH/07 change above to avoid
4238 any possible encoding problems.
4240 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4241 but not after initializing Perl.
4243 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4244 output them only if debugging. By default they are written stderr,
4245 apparently, which is not desirable.
4247 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4250 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4253 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4255 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4256 authenticated or an ident call has been made. Suppress the default
4257 values for $authenticated_id and $authenticated_sender (but permit -oMai
4258 and -oMas) when testing with -bh.
4260 PH/24 Re-jigged the order of the tests in the default configuration so that the
4261 tests for valid domains and recipients precede the DNS black list and CSA
4262 tests, on the grounds that those ones are more expensive.
4264 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4265 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4266 This bug exists in every version of Exim that I still have, right back to
4269 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4270 However, an attempt to turn on case-sensitivity in a regex key by
4271 including (?-i) didn't work because the subject string was already
4272 lowercased, and the effects were non-intuitive. It turns out that a
4273 one-line patch can be used to allow (?-i) to work as expected.
4279 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4280 other effects) broke the use of negated acl sub-conditions.
4282 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4285 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4286 "Deny" causes Exim to reject the incoming connection with a 554 error.
4287 Unfortunately, if there is a major crisis, such as a disk failure,
4288 tcp-wrappers gives "deny", whereas what one would like would be some
4289 kind of temporary error. A kludge has been added to help with this.
4290 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4291 554 error is used if errno is still zero or contains ENOENT (which occurs
4292 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4295 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4297 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4298 errors. Otherwise a message that provokes a temporary error (when other
4299 messages do not) can cause a whole host to time out.
4301 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4302 addresses were routed directly to files or pipes from a redirect router.
4303 File deliveries just didn't batch; pipe deliveries might have suffered
4306 PH/06 A failure to get a lock for a hints database would erroneously always say
4307 "Failed to get write lock", even when it was really a read lock.
4309 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4310 of 0600. This has been changed to use the value of the lockfile_mode
4311 option (which defaults to 0600).
4313 PH/08 Applied small patch from the Sieve maintainer.
4315 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4316 folder from quota calculations, a direct delivery into this folder messed
4317 up the contents of the maildirsize file. This was because the regex was
4318 used only to exclude .Trash (or whatever) when the size of the mailbox
4319 was calculated. There was no check that a delivery was happening into an
4320 excluded directory. This bug has been fixed by ignoring all quota
4321 processing for deliveries into excluded directories.
4323 PH/10 Added the maildirfolder_create_regex option to appendfile.
4329 PH/01 The code for finding all the local interface addresses on a FreeBSD
4330 system running IPv6 was broken. This may well have applied to all BSD
4331 systems, as well as to others that have similar system calls. The broken
4332 code found IPv4 interfaces correctly, but gave incorrect values for the
4333 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4334 that it would not match correctly against @[] and not recognize the IPv6
4337 PH/02 The ipliteral router was not recognizing addresses of the form user@
4338 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4340 PH/03 Added disable_ipv6.
4342 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4343 decoded form, because it is most often used to construct To: headers
4344 lines in autoreplies, and the decoded form may well be syntactically
4345 invalid. However, $reply_address has leading white space removed, and all
4346 newlines turned into spaces so that the autoreply transport does not
4349 PH/05 If group was specified without a user on a router, and no group or user
4350 was specified on a transport, the group from the router was ignored.
4352 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4353 for visible compile-time settings that can be used to change these
4354 numbers, for those that want even more. Backwards compatibility with old
4355 spool files has been maintained. However, going back to a previous Exim
4356 release will lost any variables that are in spool files.
4358 PH/07 Two small changes when running in the test harness: increase delay when
4359 passing a TCP/IP connection to a new process, in case the original
4360 process has to generate a bounce, and remove special handling of
4361 127.0.0.2 (sic), which is no longer necessary.
4363 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4364 be the same on different OS.
4366 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4369 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4370 whether --show-vars was specified or not
4372 JJ/02 exipick: Added support for new ACL variable spool format introduced
4375 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4376 syntactically invalid From: or Reply-to: line, and a filter used this to
4377 generate an autoreply, and therefore failed to obtain an address for the
4378 autoreply, Exim could try to deliver to a non-existent relative file
4379 name, causing unrelated and misleading errors. What now happens is that
4380 it logs this as a hard delivery error, but does not attempt to create a
4383 PH/11 The exinext utility has a -C option for testing purposes, but although
4384 the given file was scanned by exinext itself; it wasn't being passed on
4385 when Exim was called.
4387 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4388 an end-of-file indication when reading a command response.
4390 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4391 compiled. In many other places in Exim, IPv6 addresses are always
4392 recognized, so I have changed this. It also means that IPv4 domain
4393 literals of the form [IPV4:n.n.n.n] are now always recognized.
4395 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4396 used if the router is not running as root, for example, when verifying at
4397 ACL time, or when using -bh. The debugging output from this situation was
4398 non-existent - all you got was a failure to exec. I have made two
4401 (a) Failures to set uid/gid, the current directory, or a process leader
4402 in a subprocess such as that created by queryprogram now generate
4403 suitable debugging output when -d is set.
4405 (b) The queryprogram router detects when it is not running as root,
4406 outputs suitable debugging information if -d is set, and then runs
4407 the subprocess without attempting to change uid/gid.
4409 PH/15 Minor change to Makefile for building test_host (undocumented testing
4412 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4413 additional section of a DNS packet that returns MX or SRV records.
4414 Instead, it always explicitly searches for A/AAAA records. This avoids
4415 major problems that occur when a DNS server includes only records of one
4416 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4417 fixed another bug: if SRV records were looked up and the corresponding
4418 address records were *not* found in the additional section, the port
4419 values from the SRV records were lost.
4421 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4422 using the correct key (the original address) when searching the retry
4423 rules in order to find which one to use for generating the retry hint.
4425 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4426 adding the default one. Similarly, if it contains a Reply-To: header, the
4427 errors_reply_to option, if set, is not used.
4429 PH/19 When calculating a retry time, Exim used to measure the "time since
4430 failure" by looking at the "first failed" field in the retry record. Now
4431 it does not use this if it is later than than the arrival time of the
4432 message. Instead it uses the arrival time. This makes for better
4433 behaviour in cases where some deliveries succeed, thus re-setting the
4434 "first failed" field. An example is a quota failure for a huge message
4435 when small messages continue to be delivered. Without this change, the
4436 "time since failure" will always be short, possible causing more frequent
4437 delivery attempts for the huge message than are intended.
4438 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4440 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4441 $1, $2, $3) because the numerical variables can be reset during some
4442 expansion items (e.g. "match"), thereby losing the authentication data.
4444 PH/21 Make -bV show the size of off_t variables so that the test suite can
4445 decide whether to run tests for quotas > 2G.
4447 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4448 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4449 filecount value is greater than 2G or if a quota value is greater than 2G
4450 on a system where the size of off_t is not greater than 4, a panic error
4453 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4454 never match. The debug and -bh output now contains an explicit error
4455 message indicating a malformed IPv4 address or mask.
4457 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4458 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4459 PH/23 above applies.
4461 PH/25 Do not write to syslog when running in the test harness. The only
4462 occasion when this arises is a failure to open the main or panic logs
4463 (for which there is an explicit test).
4465 PH/26 Added the /no_tell option to "control=freeze".
4467 PH/27 If a host name lookup failed very early in a connection, for example, if
4468 the IP address matched host_lookup and the reverse lookup yielded a name
4469 that did not have a forward lookup, an error message of the form "no IP
4470 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4471 could be logged. Now it outputs the IP address instead of "NULL".
4473 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4474 allows the sender and the authenticated sender to be set when
4475 submitting a message from within Exim. Since child_open_exim() is
4476 documented for local_scan(), the new function should be too.
4478 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4479 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4480 results in an empty string is now treated as unset.
4482 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4484 PH/31 Added sender_verify_fail logging option.
4486 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4487 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4488 tidied the source and removed it altogether.
4490 PH/33 When a queue run was abandoned because the load average was too high, a
4491 log line was always written; now it is written only if the queue_run log
4492 selector is set. In addition, the log line for abandonment now contains
4493 information about the queue run such as the pid. This is always present
4494 in "start" and "stop" lines but was omitted from the "abandon" line.
4496 PH/34 Omit spaces between a header name and the colon in the error message that
4497 is given when verify = headers_syntax fails (if there are lots of them,
4498 the message gets confusing).
4500 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4501 names, as there are now some PTR records that contain slashes. This check
4502 is only to protect against broken name servers that fall over on strange
4503 characters, so the fact that it applies to all lookups doesn't matter.
4505 PH/36 Now that the new test suite is complete, we can remove some of the
4506 special code in Exim that was needed for the old test suite. For example,
4507 sorting DNS records because real resolvers return them in an arbitrary
4508 order. The new test suite's fake resolver always returns records in the
4511 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4512 bounces) except when queue_only is set, to avoid logging races between
4513 the different processes.
4515 PH/38 Panic-die if .include specifies a non-absolute path.
4517 PH/39 A tweak to the "H" retry rule from its user.
4519 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4520 a label. They prevented compilation on older perls.
4522 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4523 a warning to be raised on newish perls.
4525 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4526 on queue. Changes to match documented behaviour of showing count of
4527 messages matching specified criteria.
4529 PH/40 Changed the default ident timeout from 30s to 5s.
4531 PH/41 Added support for the use of login_cap features, on those BSD systems
4532 that have them, for controlling the resources used by pipe deliveries.
4534 PH/42 The content-scanning code uses fopen() to create files in which to put
4535 message data. Previously it was not paying any attention to the mode of
4536 the files. Exim runs with umask(0) because the rest of the code creates
4537 files with open(), and sets the required mode explicitly. Thus, these
4538 files were ending up world-writeable. This was not a big issue, because,
4539 being within the spool directory, they were not world-accessible. I have
4540 created a function called modefopen, which takes an additional mode
4541 argument. It sets umask(777), creates the file, chmods it to the required
4542 mode, then resets the umask. All the relevant calls to fopen() in the
4543 content scanning code have been changed to use this function.
4545 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4546 to 24 hours. This avoids potential overflow problems when processing G
4547 and H retry rules. I suspect nobody ever tinkers with this value.
4549 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4551 PH/45 When the plaintext authenticator is running as a client, the server's
4552 challenges are checked to ensure they are valid base64 strings. By
4553 default, the authentication attempt is cancelled if an invalid string is
4554 received. Setting client_ignore_invalid_base64 true ignores these errors.
4555 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4556 they are received. Thus, the responses can be made to depend on the
4557 challenges. If an invalid string is ignored, an empty string is placed in
4560 PH/46 Messages that are created by the autoreply transport now contains a
4561 References: header, in accordance with RFCs 2822 and 3834.
4563 PH/47 Added authenticated_sender_force to the smtp transport.
4565 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4567 PH/49 Installed latest patch from the Sieve maintainer.
4569 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4570 was also set, the appendfile transport was unnecessarily scanning a
4571 directory of message files (e.g. for maildir delivery) to find the count
4572 of files (along with the size), even though it did not need this
4573 information. It now does the scan only if it needs to find either the
4574 size of the count of files.
4576 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4578 PH/52 Two bugs concerned with error handling when the smtp transport is
4581 (i) Exim was not creating retry information for temporary errors given
4582 for individual recipients after the DATA command when the smtp transport
4583 was used in LMTP mode. This meant that they could be retried too
4584 frequently, and not timed out correctly.
4586 (ii) Exim was setting the flag that allows error details to be returned
4587 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4588 recipients that were returned after the DATA command.
4590 PH/53 This is related to PH/52, but is more general: for any failing address,
4591 when detailed error information was permitted to be returned to the
4592 sender, but the error was temporary, then after the final timeout, only
4593 "retry timeout exceeded" was returned. Now it returns the full error as
4594 well as "retry timeout exceeded".
4596 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4597 do this, and (what is worse) MTAs that accept it.
4599 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4600 will now be deprecated.
4602 PH/56 New os.c-cygwin from the Cygwin maintainer.
4604 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4605 formats (previously only available in exim formats via -bpr, -bpru,
4606 and -bpra. Now also available in native and exiqgrep formats)
4608 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4609 with very large, slow to parse queues
4611 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4613 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4615 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4616 responses to authentication challenges, though it was showing the
4617 challenges; (ii) I've removed the CR characters from the debug output for
4620 PH/58 Allow for the insertion of a newline as well as a space when a string
4621 is turned into more than one encoded-word during RFC 2047 encoding. The
4622 Sieve code now uses this.
4624 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4625 data_4xx, lost_connection, tls_required.
4627 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4628 message was being sent as an SMTP response.
4630 PH/61 Add -l and -k options to exicyclog.
4632 PH/62 When verifying, if an address was redirected to one new address, so that
4633 verification continued, and the new address failed or deferred after
4634 having set something in $address_data, the value of $address_data was not
4635 passed back to the ACL. This was different to the case when no
4636 redirection occurred. The value is now passed back in both cases.
4638 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4639 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4640 use login_cap.h, so on its own it isn't the distinguishing feature. The
4641 new name refers directly to the setclassresources() function.
4643 PH/65 Added configuration files for NetBSD3.
4645 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4647 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4648 is preferred over IPv4.
4650 PH/68 The bounce_return_message and bounce_return_body options were not being
4651 honoured for bounces generated during the reception of non-SMTP messages.
4652 In particular, this applied to messages rejected by the ACL. This bug has
4653 been fixed. However, if bounce_return_message is true and bounce_return_
4654 body is false, the headers that are returned for a non-SMTP message
4655 include only those that have been read before the error was detected.
4656 (In the case of an ACL rejection, they have all been read.)
4658 PH/69 The HTML version of the specification is now built in a directory called
4659 spec_html instead of spec.html, because the latter looks like a path with
4660 a MIME-type, and this confuses some software.
4662 PH/70 Catch two compiler warnings in sieve.c.
4664 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4665 function verify_get_ident() calls ip_connect() to connect a socket, but
4666 if the "connect()" function timed out, ip_connect() used to close the
4667 socket. However, verify_get_ident() also closes the socket later, and in
4668 between Exim writes to the log, which may get opened at this point. When
4669 the socket was closed in ip_connect(), the log could get the same file
4670 descriptor number as the socket. This naturally causes chaos. The fix is
4671 not to close the socket in ip_connect(); the socket should be closed by
4672 the function that creates it. There was only one place in the code where
4673 this was missing, in the iplookup router, which I don't think anybody now
4674 uses, but I've fixed it anyway.
4676 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4677 well as to direct DNS lookups. Otherwise the handling of names in host
4678 lists is inconsistent and therefore confusing.
4684 PH/01 Two changes to the default runtime configuration:
4686 (1) Move the checks for relay_from_hosts and authenticated clients from
4687 after to before the (commented out) DNS black list checks.
4689 (2) Add control=submission to the relay_from_hosts and authenticated
4690 clients checks, on the grounds that messages accepted by these
4691 statements are most likely to be submissions.
4693 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4695 (1) Generate an error if the third argument for the ${prvs expansion is
4698 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4701 (3) Reset the variables that are obtained from the first argument of
4702 ${prvscheck and used in the second argument before leaving the code,
4703 because their memory is reclaimed, so using them afterwards may do
4706 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4707 one (it's much easier than Tom thought :-).
4709 (5) Because of (4), we can now allow for the use of $prvscheck_result
4710 inside the third argument.
4712 PH/03 For some reason, the default setting of PATH when running a command from
4713 a pipe transport was just "/usr/bin". I have changed it to
4716 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4717 anything to be listed in the output from -bV.
4719 PH/05 When a filter generated an autoreply, the entire To: header line was
4720 quoted in the delivery log line, like this:
4722 => >A.N.Other <ano@some.domain> <original@ddress> ...
4724 This has been changed so that it extracts the operative address. There
4725 may be more than one such address. If so, they are comma-separated, like
4728 => >ano@some.domain,ona@other.domain <original@ddress> ...
4730 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4731 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4732 not being looked up in the rDNS to get a host name, Exim was showing the
4733 IP address twice in Received: lines, even though the IP addresses were
4734 identical. For example:
4736 Received: from [1.2.3.4] (helo=[1.2.3.4])
4738 However, if the real host name was known, it was omitting the HELO data
4739 if it matched the actual IP address. This has been tidied up so that it
4740 doesn't show the same IP address twice.
4742 PH/07 When both +timestamp and +memory debugging was on, the value given by
4743 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4744 called by the debug printing, thereby overwriting the timestamp buffer.
4745 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4747 PH/08 When the original message was included in an autoreply transport, it
4748 always said "this is a copy of the message, including all the headers",
4749 even if body_only or headers_only was set. It now gives an appropriate
4752 PH/09 Applied a patch from the Sieve maintainer which:
4754 o fixes some comments
4755 o adds the (disabled) notify extension core
4756 o adds some debug output for the result of if/elsif tests
4757 o points to the current vacation draft in the documentation
4758 and documents the missing references header update
4762 o fixes a bug in processing the envelope test (when testing
4763 multiple envelope elements, the last element determined the
4766 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4767 Electronic Mail") by including:
4769 Auto-submitted: auto-generated
4771 in the messages that it generates (bounce messages and others, such as
4772 warnings). In the case of bounce messages for non-SMTP messages, there was
4773 also a typo: it was using "Auto_submitted" (underscore instead of
4774 hyphen). Since every message generated by Exim is necessarily in response
4775 to another message, thes have all been changed to:
4777 Auto-Submitted: auto-replied
4779 in accordance with these statements in the RFC:
4781 The auto-replied keyword:
4783 - SHOULD be used on messages sent in direct response to another
4784 message by an automatic process,
4786 - MUST NOT be used on manually-generated messages,
4788 - MAY be used on Delivery Status Notifications (DSNs) and Message
4789 Disposition Notifications (MDNs),
4791 - MUST NOT be used on messages generated by automatic or periodic
4792 processes, except for messages which are automatic responses to
4795 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4796 to the default Received: header definition.
4798 PH/12 Added log selector acl_warn_skipped (default on).
4800 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4801 variables because (a) they are in the wrong storage pool and (b) even if
4802 they were copied, it wouldn't work properly because of the caching.
4804 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4805 checking when decoding. Apparently there are clients that generate
4806 overlong encoded strings. Why am I not surprised?
4808 PH/15 If the first argument of "${if match_address" was not empty, but did not
4809 contain an "@" character, Exim crashed. Now it writes a panic log message
4810 and treats the condition as false.
4812 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4814 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4815 extension "envelope-auth". The code is finished and in agreement with
4816 other implementations, but there is no documentation so far and in fact,
4817 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4818 not changing the active code.
4820 Print executed "if" and "elsif" statements when debugging is used. This
4821 helps a great deal to understand what a filter does.
4823 Document more things not specified clearly in RFC3028. I had all this
4824 sorted out, when out of a sudden new issues came to my mind. Oops."
4826 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4829 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4830 canonical form (as documented). However, after a host name lookup from
4831 the IP address, check_host() was doing a simple string comparison with
4832 addresses acquired from the DNS when checking that the found name did
4833 have the original IP as one of its addresses. Since any found IPv6
4834 addresses are likely to be in abbreviated form, the comparison could
4835 fail. Luckily, there already exists a function for doing the comparison
4836 by converting both addresses to binary, so now that is used instead of
4837 the text comparison.
4839 PH/20 There was another similar case to PH/19, when a complete host name was
4840 given in a host list; looking up its IP address could give an abbreviated
4841 form, whereas the current host's name might or might not be abbreviated.
4842 The same fix has been applied.
4848 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4849 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4852 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4853 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4855 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4857 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4858 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4859 Also, for "Auto-Submitted", treat anything other than "no" as
4860 non-personal, in accordance with RFC 3834. (Previously it treated
4861 anything starting "auto-" as non-personal.)
4863 TF/01 The control=submission/name=... option had a problem with syntax
4864 errors if the name included a slash character. The /name= option
4865 now slurps the rest of the string, so it can include any characters
4866 but it must come last in the list of options (after /sender_retain
4869 PH/05 Some modifications to the interface to the fake nameserver for the new
4877 TK/01 Added the "success_on_redirect" address verification option. See
4878 NewStuff for rationale and an example.
4880 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4882 PH/02 Patch to exigrep to allow it to work on syslog lines.
4884 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4885 fread() to skip over the body file's header line, because in Cygwin the
4886 header line is locked and is inaccessible.
4888 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4889 co-exist for some time) to make it clear that it is the Exim ID that is
4890 referenced, not the Message-ID: header line.
4892 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4893 string_format() function, because snprintf() does not exist on all
4896 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4897 ${stat: expansion item.
4899 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4900 protocol synchronization error", to keep the pedants happy.
4902 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4903 well as for IRIX systems, when gcc is being used. See the host.c source
4906 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4908 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4911 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4912 transport and to the smtp transport in LMTP mode.
4914 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4916 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4917 run a filter in a subprocess. This could lead to confusion in subsequent
4918 lookups in the parent process. There should also be a search_tidyup() at
4919 the end of the subprocess.
4921 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4922 only if the host matched helo_try_verify_hosts, which caused the
4923 verification to occur when the EHLO/HELO command was issued. The ACL just
4924 tested the remembered result. Now, if a previous verification attempt has
4925 not happened, "verify = helo" does it there and then.
4927 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4929 TK/03 Fix log output including CR from clamd.
4931 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4932 exist provoked a memory error which could cause a segfault.
4934 PH/15 Installed PCRE 6.2
4936 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4938 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4939 of the problem. Specifically, suggested +O2 rather than +O1 for the
4942 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4944 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4945 record, the port was not correctly logged when the outgoing_port log
4946 selector was set (it logged the transort's default port).
4948 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4949 fallback_hosts, and "hosts" in the smtp transport.
4951 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4952 host errors such as "Connection refused".
4954 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4955 authentication with radiusclient 0.4.9:
4957 - Error returned from rc_read_config was caught wrongly
4958 - Username/password not passed on to radius server due to wrong length.
4960 The presumption is that some radiusclient API changes for 4.51/PH/17
4961 were not taken care of correctly. The code is still untested by me (my
4962 Linux distribution still has 0.3.2 of radiusclient), but it was
4963 contributed by a Radius user.
4965 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4966 expanding the "port" option of the smtp transport.
4968 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4969 while reading a MIME header. Thanks to Tom Hughes for a patch.
4971 PH/24 Include config.h inside local_scan.h so that configuration settings are
4974 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4975 that in an ACL for RCPT (for example), you can examine exactly what was
4978 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4979 commands, but it was not correctly comparing the address with the actual
4980 client host address. Thus, it would show the EHLO address in Received:
4981 header lines when this was not necessary.
4983 PH/27 Added the % operator to ${eval:}.
4985 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4986 it should be ignoring failures (because with -C, for example, it has lost
4987 privilege). It wasn't ignoring creation failures other than "already
4990 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4993 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4994 because an input line was too long, either on its own, or by virtue of
4995 too many continuations, the temporary file was not being removed, and the
4996 return code was incorrect.
4998 PH/31 Missing "BOOL" in function definition in filtertest.c.
5000 PH/32 Applied Sieve patches from the maintainer.
5002 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5004 PH/33 Added "verify = not_blind".
5006 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5007 Local/Makefile (with some defaults set). These are used in built scripts
5008 such as exicyclog, but they have never been used in the exim_install
5009 script (though there are many overriding facilities there). I have
5010 arranged that the exim_install script now takes note of these two
5013 PH/35 Installed configuration files for Dragonfly.
5015 PH/36 When a locally submitted message by a trusted user did not contain a
5016 From: header, and the sender address was obtained from -f or from an SMTP
5017 MAIL command, and the trusted user did not use -F to supply a sender
5018 name, $originator_name was incorrectly used when constructing a From:
5019 header. Furthermore, $originator_name was used for submission mode
5020 messages from external hosts without From: headers in a similar way,
5021 which is clearly wrong.
5023 PH/37 Added control=suppress_local_fixups.
5025 PH/38 When log_selector = +received_sender was set, and the addition of the
5026 sender made the log line's construction buffer exactly full, or one byte
5027 less than full, an overflow happened when the terminating "\n" was
5030 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5031 when the result of a list match is failure because a DNS lookup failed.
5033 PH/40 RM_COMMAND is now used in the building process.
5035 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5036 the "build-* directories that it finds.
5038 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5039 address in a domain literal was a prefix of an interface address.
5041 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5042 when verifying a sender address, unless rewrite_headers is false.
5044 PH/44 Wrote a long comment about why errors_to addresses are verified as
5045 recipients, not senders.
5047 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5048 the ratelimit ACL was added.
5050 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5052 PH/46 Added extra information about PostgreSQL errors to the error string.
5054 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5055 avoiding the need to install special zones in a real server. This is
5056 backwards compatible; if it can't find the fake resolver, it drops back.
5057 Thus, both old and new test suites can be run.
5059 TF/02 Added util/ratelimit.pl
5061 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5062 clock is set back in time.
5064 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5065 Candler <B.Candler@pobox.com>.
5067 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5068 OK for addresses that are the result of redirections.
5070 PH/48 A number of further additions for the benefit of the new test suite,
5071 including a fake gethostbyname() that interfaces to the fake DNS resolver
5074 TF/06 The fix for widen_domains has also been applied to qualify_single and
5075 search_parents which are the other dnslookup options that can cause
5078 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5081 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5083 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5084 service" if it encountered an MX record with an empty target hostname.
5085 The message is now "an MX or SRV record indicated no SMTP service".
5087 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5088 if the DNS of the sending site is misconfigured. This is quite a
5089 common situation. This change restores the behaviour of treating a
5090 helo verification defer as a failure.
5092 PH/51 If self=fail was set on a router, the bounce message did not include the
5093 actual error message.
5099 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5101 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5102 command itself ended in error, the underlying message about the transport
5103 filter timeout was being overwritten with the pipe command error. Now the
5104 underlying error message should be appended to the second error message.
5106 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5108 PH/02 Reduce the amount of output that "make" produces by default. Full output
5109 can still be requested.
5111 PH/03 The warning log line about a condition test deferring for a "warn" verb
5112 was being output only once per connection, rather than after each
5113 occurrence (because it was using the same function as for successful
5114 "warn" verbs). This seems wrong, so I have changed it.
5116 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5117 it should not have, which might have caused a crash in the right
5118 circumstances, but probably never did.
5120 PH/04 Installed a modified version of Tony Finch's patch to make submission
5121 mode fix the return path as well as the Sender: header line, and to
5122 add a /name= option so that you can make the user's friendly name appear
5125 TF/03 Added the control = fakedefer ACL modifier.
5127 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5128 Mark Lowes for thorough testing.
5130 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5132 TK/03 Merged latest SRS patch from Miles Wilton.
5134 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5135 with the definition in sysexits.h (which is #included earlier).
5136 Fortunately, Exim does not actually use EX_OK. The code used to try to
5137 preserve the sysexits.h value, by assuming that macro definitions were
5138 scanned for macro replacements. I have been disabused of this notion,
5139 so now the code just undefines EX_OK before #including unistd.h.
5141 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5142 in the smtp transport. When a block could not be written in a single
5143 write() function, the timeout was being re-applied to each part-write.
5144 This seems wrong - if the receiver was accepting one byte at a time it
5145 would take for ever. The timeout is now adjusted when this happens. It
5146 doesn't have to be particularly precise.
5148 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5149 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5151 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5152 without a domain if the check to <postmaster@domain> fails.
5154 SC/01 Eximstats: added -xls and the ability to specify output files
5155 (patch written by Frank Heydlauf).
5157 SC/02 Eximstats: use FileHandles for outputting results.
5159 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5161 SC/04 Eximstats: fixed display of large numbers with -nvr option
5163 SC/05 Eximstats: fixed merging of reports with empty tables.
5165 SC/06 Eximstats: added the -include_original_destination flag
5167 SC/07 Eximstats: removed tabs and trailing whitespace.
5169 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5171 TK/06 MBOX spool code: Add real "From " MBOX separator line
5172 so the .eml file is really in mbox format (even though
5173 most programs do not really care). Patch from Alex Miller.
5175 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5176 The latter is generated from $received_to and is only set if the
5177 message has one envelope recipient. SA can use these headers,
5178 obviously out-of-the-box. Patch from Alex Miller.
5180 PH/08 The ${def test on a variable was returning false if the variable's
5181 value was "0", contrary to what the specification has always said!
5182 The result should be true unless the variable is empty.
5184 PH/09 The syntax error of a character other than { following "${if
5185 def:variable_name" (after optional whitespace) was not being diagnosed.
5186 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5187 accidental colon was present, for example, could give incorrect results.
5189 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5190 result is used (not including appendfile, where other changes are about
5193 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5194 This involved changing a lot of size variables from int to off_t. It
5195 should work with maildirs and everything.
5197 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5198 spamd dying while we are connected to it.
5200 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5203 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5204 function for BDB 4.3.
5206 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5208 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5209 the sources for PCRE have been re-arranged and more files are now
5212 PH/15 The code I had for printing potentially long long variables in PH/11
5213 above was not the best (it lost precision). The length of off_t variables
5214 is now inspected at build time, and an appropriate printing format (%ld
5215 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5216 to be "long long int" or "long int". This is needed for the internal
5217 formatting function string_vformat().
5219 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5220 the configuration file to be ":syslog", then the script "guesses" where
5221 the logs files are, rather than using the compiled in default. In our
5222 case the guess is not the same as the compiled default, so the script
5223 suddenly stopped working when I started to use syslog. The patch checks
5224 to see if log_file_path is "". If so, it attempts to read it from exim
5225 with no configuration file to get the compiled in version, before it
5226 falls back to the previous guessing code."
5228 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5229 implementing BATV in an Exim configuration. See NewStuff for the gory
5232 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5233 Makefile that are specific to HP-UX.
5235 PH/18 If the "use_postmaster" option was set for a recipient callout together
5236 with the "random" option, the postmaster address was used as the MAIL
5237 FROM address for the random test, but not for the subsequent recipient
5238 test. It is now used for both.
5240 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5241 patch removes a few documentation additions to RFC 3028, because the
5242 latest draft now contains them. It adds the new en;ascii-case comparator
5243 and a new error check for 8bit text in MIME parts. Comparator and
5244 require names are now matched exactly. I enabled the subaddress
5245 extension, but it is not well tested yet (read: it works for me)."
5247 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5248 rework some of the code of TK/09 above to avoid the hardwired use of
5249 "%lld" and "long long". Replaced the call to snprintf() with a call to
5252 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5253 records point to non-existent hosts", "retry timeout exceeded", and
5254 "retry time not reached for any host after a long failure period".
5256 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5257 experimental DomainKeys support:
5259 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5260 (2) On an error such as an illegally used "control", the wrong name for
5261 the control was given.
5263 These problems did NOT occur unless DomainKeys support was compiled.
5265 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5267 PH/24 Added ${if match_ip condition.
5269 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5270 databases so that it will be absolutely obvious if a crash occurs in the
5271 DB library. This is a regular occurrence (often caused by mis-matched
5274 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5275 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5276 picked up on a user's system that detects such things. There doesn't seem
5277 to be a gcc warning option for this - only an attribute that has to be
5278 put on the function's prototype. It seems that in Fedora Core 4 they have
5279 set this on a number of new functions. No doubt there will be more in due
5282 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5283 specify a transport. However, if an address that was verified by such a
5284 router was the subject of a callout, Exim crashed because it tried to
5285 read the rcpt_include_affixes from the non-existent transport. Now it
5286 just assumes that the setting of that option is false. This bug was
5287 introduced by 4.51/PH/31.
5289 PH/28 Changed -d+all to exclude +memory, because that information is very
5290 rarely of interest, but it makes the output a lot bigger. People tend to
5291 do -d+all out of habit.
5293 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5294 code in os-type was giving problems when libc.so lives in lib64, like on
5297 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5298 aren't the modern standard, and it seems that some systems' include files
5299 don't always have them. Exim was already checking for some of the newer
5300 ones like T_AAAA, and defining it itself. I've added checks for all the
5301 record types that Exim uses.
5303 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5304 not automatically generating a new one, as it is supposed to. This
5305 prevented TLS from working. If the file did exist, but contained invalid
5306 data, a new version was generated, as expected. It was only the case of a
5307 non-existent file that was broken.
5309 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5310 with a change in libdomainkeys > 0.64.
5312 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5313 from DNS. If the selector record carries the flag, it now has
5314 precedence over the domain-wide flag.
5316 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5318 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5319 the use of a port name that isn't defined in /etc/services) occurred, the
5320 message was deferred as in a normal delivery, and thus remained on the
5321 spool, instead of being failed because of the mua_wrapper setting. This
5322 is now fixed, and I tidied up some of the mua_wrapper messages at the
5325 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5326 the messages in a hash of arrays rather than using individual hashes.
5327 This is a bit cleaner and results in dramatic memory savings, albeit
5328 at a slight CPU cost.
5330 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5331 as requested by Marc Sherman.
5333 SC/10 Eximstats: added histograms for user specified patterns as requested
5336 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5338 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5339 fopen() in the content-scanning modules that did not already have it.
5345 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5346 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5348 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5350 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5352 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5353 to test Sieve filters that use "vacation".
5355 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5356 that changes the way the GnuTLS parameters are stored in the cache file.
5357 The new format can be generated externally. For backward compatibility,
5358 if the data in the cache doesn't make sense, Exim assumes it has read an
5359 old-format file, and it generates new data and writes a new file. This
5360 means that you can't go back to an older release without removing the
5363 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5364 work if there are any delivery delays because "one_time" forces the
5365 parent to be marked "delivered", so its unseen clone is never tried
5366 again. For this reason, Exim now forbids the simultaneous setting of
5369 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5370 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5371 entry if you want to know the details. The fix, however, neglected to
5372 consider the case when local delivery batching is involved. The test for
5373 "previously delivered" was not happening when checking to see if an
5374 address could be batched with a previous (undelivered) one; under
5375 certain circumstances this could lead to multiple deliveries to the same
5378 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5379 in its include files, and this causes problems building Exim.
5381 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5382 header_syntax) but Exim was just ignoring anything given after a slash.
5383 In particular, this caused confusion with an attempt to use "verify =
5384 reverse_host_lookup/defer_ok". An error is now given when options are
5385 supplied for verify items that do not have them. (Maybe reverse_host_
5386 lookup should have a defer_ok option, but that's a different point.)
5388 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5389 defined by RFC 821) to 2048, because there were problems with some AUTH
5390 commands, and RFC 1869 says the size should be increased for extended
5391 SMTP commands that take arguments.
5393 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5396 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5397 "unknown" error; now it says that the functionality isn't in the binary.
5399 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5400 an address' error message when a string expansion fails (syntax or
5401 whatever). Otherwise the password may appear in the log. Following change
5402 PH/42 below, there is no longer a chance of it appearing in a bounce
5405 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5407 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5408 of its addresses was ever tried. (Bugzilla bug #2.)
5410 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5411 the result incorrectly in the debug output. (It correctly added a newline
5412 to what was transported.)
5414 TF/01 Added $received_time.
5416 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5417 commented out examples of how to interface to a virus scanner and to
5418 SpamAssassin. Also added commented examples of av_scanner and
5419 spamd_address settings.
5421 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5422 and controls are allowed in which ACLs. There were a couple of minor
5423 errors. Some of the entries in the conditions table (which is a table of
5424 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5425 negation of where the condition IS allowed.
5427 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5429 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5430 header file does not have a version number, so I've had to invent a new
5431 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5432 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5433 radiusclient), but it was contributed by a Radius user.
5435 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5436 files or directories, for OpenSSL.
5438 PH/19 When an Exim process that is running as root has to create an Exim log
5439 file, it does so in a subprocess that runs as exim:exim so as to get the
5440 ownership right at creation (otherwise, other Exim processes might see
5441 the file with the wrong ownership). There was no test for failure of this
5442 fork() call, which would lead to the process getting stuck as it waited
5443 for a non-existent subprocess. Forks do occasionally fail when resources
5444 run out. I reviewed all the other calls to fork(); they all seem to check
5447 PH/20 When checking for unexpected SMTP input at connect time (before writing
5448 the banner), Exim was not dealing correctly with a non-positive return
5449 from the read() function. If the client had disconnected by this time,
5450 the result was a log entry for a synchronization error with an empty
5451 string after "input=" when read() returned zero. If read() returned -1
5452 (an event I could not check), uninitialized data bytes were printed.
5453 There were reports of junk text (parts of files, etc) appearing after
5456 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5458 PH/22 Added support for macro redefinition, and (re)definition in between
5459 driver and ACL definitions.
5461 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5462 forgetting to use the resulting value; it was using the unexpanded value.
5464 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5465 hadn't been configured. The fix is from Juergen Kreileder, who
5466 understands it better than I do:
5468 "Here's what I see happening with three configured cyrus_sasl
5469 authenticators configured (plain, login, cram-md5):
5471 On startup auth_cyrus_sasl_init() gets called for each of these.
5472 This means three calls to sasl_listmech() without a specified mech_list.
5473 => SASL tests which mechs of all available mechs actually work
5474 => three warnings about OTP not working
5475 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5477 With the patch, sasl_listmech() also gets called three times. But now
5478 SASL's mech_list option is set to the server_mech specified in the the
5479 authenticator. Or in other words, the answer from sasl_listmech()
5480 gets limited to just the mech you're testing for (which is different
5482 => the return list contains just 'plain' or 'login', 'cram-md5' or
5483 nothing depending on the value of ob->server_mech.
5485 I've just tested the patch: Authentication still works fine,
5486 unavailable mechs specified in the exim configuration are still
5487 caught, and the auth.log warnings about OTP are gone."
5489 PH/25 When debugging is enabled, the contents of the command line are added
5490 to the debugging output, even when log_selector=+arguments is not
5493 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5494 answer is "GNU", and only if the return is "GNU/something" is the answer
5497 PH/27 $acl_verify_message is now set immediately after the failure of a
5498 verification in an ACL, and so is available in subsequent modifiers. In
5499 particular, the message can be preserved by coding like this:
5501 warn !verify = sender
5502 set acl_m0 = $acl_verify_message
5504 Previously, $acl_verify_message was set only while expanding "message"
5505 and "log_message" when a very denied access.
5507 PH/28 Modified OS/os.c-Linux with
5509 -#ifndef OS_LOAD_AVERAGE
5510 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5512 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5513 nomenclature these days.)
5515 PH/29 Installed patch from the Sieve maintainer that adds the options
5516 sieve_useraddress and sieve_subaddress to the redirect router.
5518 PH/30 In these circumstances:
5519 . Two addresses routed to the same list of hosts;
5520 . First host does not offer TLS;
5521 . First host accepts first address;
5522 . First host gives temporary error to second address;
5523 . Second host offers TLS and a TLS session is established;
5524 . Second host accepts second address.
5525 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5526 and peerdn, if requested) that were in fact used only for the second
5529 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5530 attention to any local part prefix or suffix that was matched by the
5531 router that accepted the address. It now behaves in the same way as it
5532 does for delivery: the affixes are removed from the local part unless
5533 rcpt_include_affixes is set on the transport.
5535 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5536 timeout during the DATA phase of an incoming message.
5538 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5539 applied a patch sanctioned by the Sieve maintainer.
5541 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5542 the uid or gid is negative. A case of a negative gid caused this to be
5543 noticed. The fix allows for either to be negative.
5545 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5546 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5549 PH/36 The change PH/12 above was broken. Fixed it.
5551 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5552 the grounds that routing the same address twice would always produce the
5553 same answer. This might have been true once, but it is certainly no
5554 longer true now. Routing a child address may depend on the previous
5555 routing that produced that child. Some complicated redirection strategies
5556 went wrong when messages had multiple recipients, and made Exim's
5557 behaviour dependent on the order in which the addresses were given.
5559 I have moved the duplicate checking until after the routing is complete.
5560 Exim scans the addresses that are assigned to local and remote
5561 transports, and removes any duplicates. This means that more work will be
5562 done, as duplicates will always all be routed, but duplicates are
5563 presumably rare, so I don't expect this is of any significance.
5565 For deliveries to pipes, files, and autoreplies, the duplicate checking
5566 still happens during the routing process, since they are not going to be
5569 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5570 It corrects a timeout issue with spamd. This is Ian's comment: "The
5571 background is that sometimes spamd either never reads data from a
5572 connection it has accepted, or it never writes response data. The exiscan
5573 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5574 blindly assumes that writes won't block so it may never time out."
5576 PH/39 Allow G after quota size as well as K and M.
5578 PH/40 The value set for $authenticated_id in an authenticator may not contain
5579 binary zeroes or newlines because the value is written to log lines and
5580 to spool files. There was no check on this. Now the value is run through
5581 the string_printing() function so that such characters are converted to
5582 printable escape sequences.
5584 PH/41 $message_linecount is a new variable that contains the total number of
5585 lines in the message. Compare $body_linecount, which is the count for the
5588 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5589 bounce and delay warning messages, except in certain special cases, which
5592 (a) An SMTP error message from a remote host;
5593 (b) A message specified in a :fail: redirection;
5594 (c) A message specified in a "fail" command in a system filter;
5595 (d) A message specified in a FAIL return from the queryprogram router;
5596 (e) A message specified by the cannot_route_message router option.
5598 In these cases only, Exim does include the error details in bounce and
5599 warning messages. There are also a few cases where bland messages such
5600 as "unrouteable address" or "local delivery error" are given.
5602 PH/43 $value is now also set for the "else" part of a ${run expansion.
5604 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5605 being worked on, but at least Exim now implements the latest version to
5608 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5609 process to complete was treated as a delivery failure, a timeout while
5610 writing the message to the pipe was logged, but erroneously treated as a
5611 successful delivery. Such timeouts include transport filter timeouts. For
5612 consistency with the overall process timeout, these timeouts are now
5613 treated as errors, giving rise to delivery failures by default. However,
5614 there is now a new Boolean option for the pipe transport called
5615 timeout_defer, which, if set TRUE, converts the failures into defers for
5616 both kinds of timeout. A transport filter timeout is now identified in
5619 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5620 systems where "make" and "gmake" are different, calling "gmake" at top
5621 level broke things. I've arranged for the value of $(MAKE) to be passed
5622 from the Makefile to this script so that it can call the same version of
5626 A note about Exim versions 4.44 and 4.50
5627 ----------------------------------------
5629 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5630 changes of various kinds. As a consequence, a big documentation update was
5631 needed. This delayed the release for rather longer than seemed good, especially
5632 in the light of a couple of (minor) security issues. Therefore, the changes
5633 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5634 release. So 4.44 and 4.50 are in effect two different branches that both start
5637 I have left the 4.50 change log unchanged; it contains all the changes since
5638 4.43. The change log for 4.44 is below; many of its items are identical to
5639 those for 4.50. This seems to be the most sensible way to preserve the
5640 historical information.
5646 1. Minor wording change to the doc/README.SIEVE file.
5648 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5649 computation of the current number of files was incorrect.
5651 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5652 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5655 4. Give more explanation in the error message when the command for a transport
5656 filter fails to execute.
5658 5. There are several places where Exim runs a non-Exim command in a
5659 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5660 was being done only for the command run by the queryprogram router. It is
5661 now done for all such subprocesses. The other cases are: ${run, transport
5662 filters, and the commands run by the lmtp and pipe transports.
5664 6. Added CONFIGURE_GROUP build-time option.
5666 7. Some older OS have a limit of 256 on the maximum number of file
5667 descriptors. Exim was using setrlimit() to set 1000 as a large value
5668 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5669 systems. I've change it so that if it can't get 1000, it tries for 256.
5671 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5672 was an oversight, and furthermore, ever since the addition of extra
5673 controls (e.g. 4.43/32), the checks on when to allow different forms of
5674 "control" were broken. There should now be diagnostics for all cases when a
5675 control that does not make sense is encountered.
5677 9. Added the /retain_sender option to "control=submission".
5679 10. $recipients is now available in the predata ACL (oversight).
5681 11. Tidy the search cache before the fork to do a delivery from a message
5682 received from the command line. Otherwise the child will trigger a lookup
5683 failure and thereby defer the delivery if it tries to use (for example) a
5684 cached ldap connection that the parent has called unbind on.
5686 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5687 of $address_data from the recipient verification was clobbered by the
5688 sender verification.
5690 13. The value of address_data from a sender verification is now available in
5691 $sender_address_data in subsequent conditions in the ACL statement.
5693 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5695 15. Added a new option "connect=<time>" to callout options, to set a different
5698 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5699 was its contents. (It was OK if the option was not defined at all.)
5701 17. A "Completed" log line is now written for messages that are removed from
5702 the spool by the -Mrm option.
5704 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5705 information about exactly what failed.
5707 19. Added -dd to debug only the daemon process.
5709 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5710 handles timeouts, both on the server side and network timeouts. Renamed the
5711 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5713 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5714 It is now set to "smtps".
5716 22. $host_address is now set to the target address during the checking of
5717 ignore_target_hosts.
5719 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5720 being passed; this would have caused $sender_host_name to have been used if
5721 matching the list had actually called for a host name (not very likely,
5722 since this list is usually IP addresses). A host name is now passed as
5725 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5726 code that specifies a non-restarting handler (typically sigaction() in
5727 modern systems) in an attempt to fix a rare and obscure crash bug.
5729 25. Narrowed the window for a race in the daemon that could cause it to ignore
5730 SIGCHLD signals. This is not a major problem, because they are used only to
5731 wake it up if nothing else does.
5733 26. A malformed maildirsize file could cause Exim to calculate negative values
5734 for the mailbox size or file count. Odd effects could occur as a result.
5735 The maildirsize information is now recalculated if the size or filecount
5738 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5739 support for a long time. Removed HAVE_SYS_VFS_H.
5741 28. Installed the latest version of exipick from John Jetmore.
5743 29. In an address list, if the pattern was not a regular expression, an empty
5744 subject address (from a bounce message) matched only if the pattern was an
5745 empty string. Non-empty patterns were not even tested. This was the wrong
5746 because it is perfectly reasonable to use an empty address as part of a
5747 database query. An empty address is now tested by patterns that are
5748 lookups. However, all the other forms of pattern expect the subject to
5749 contain a local part and a domain, and therefore, for them, an empty
5750 address still always fails if the pattern is not itself empty.
5752 30. Exim went into a mad DNS loop when attempting to do a callout where the
5753 host was specified on an smtp transport, and looking it up yielded more
5754 than one IP address.
5756 31. Re-factored the code for checking spool and log partition space into a
5757 function that finds that data and another that does the check. The former
5758 is then used to implement four new variables: $spool_space, $log_space,
5759 $spool_inodes, and $log_inodes.
5761 32. The RFC2047 encoding function was originally intended for short strings
5762 such as real names; it was not keeping to the 75-character limit for
5763 encoded words that the RFC imposes. It now respects the limit, and
5764 generates multiple encoded words if necessary. To be on the safe side, I
5765 have increased the buffer size for the ${rfc2047: expansion operator from
5768 33. It is now permitted to omit both strings after an "if" condition; if the
5769 condition is true, the result is "true". As before, when the second string
5770 is omitted, a false condition yields an empty string. This makes it less
5771 cumbersome to write custom ACL and router conditions.
5773 34. Failure to deliver a bounce message always caused it to be frozen, even if
5774 there was an errors_to setting on the router. The errors_to setting is now
5777 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5778 canonical form (fully expanded) before being placed in
5779 $sender_host_address.
5781 36. The table in the code that translates DNS record types into text (T_A to
5782 "A" for instance) was missing entries for NS and CNAME. It is just possible
5783 that this could have caused confusion if both these types were looked up
5784 for the same domain, because the text type is used as part of Exim's
5785 per-process caching. But the chance of anyone hitting this buglet seems
5788 37. The dnsdb lookup has been extended in a number of ways.
5790 (1) There is a new type, "zns", which walks up the domain tree until it
5791 finds some nameserver records. It should be used with care.
5793 (2) There is a new type, "mxh", which is like "mx" except that it returns
5794 just the host names, not the priorities.
5796 (3) It is now possible to give a list of domains (or IP addresses) to be
5797 looked up. The behaviour when one of the lookups defers can be
5798 controlled by a keyword.
5800 (4) It is now possible to specify the separator character for use when
5801 multiple records are returned.
5803 38. The dnslists ACL condition has been extended: it is now possible to supply
5804 a list of IP addresses and/or domains to be looked up in a particular DNS
5807 39. Added log_selector=+queue_time_overall.
5809 40. When running the queue in the test harness, wait just a tad after forking a
5810 delivery process, to get repeatability of debugging output.
5812 41. Include certificate and key file names in error message when GnuTLS fails
5813 to set them up, because the GnuTLS error message doesn't include the name
5814 of the failing file when there is a problem reading it.
5816 42. Allow both -bf and -bF in the same test run.
5818 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5820 44. The "Exiscan patch" is now merged into the mainline Exim source.
5822 45. Sometimes the final signoff response after QUIT could fail to get
5823 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5824 < 0 before doing a fflush(). This bug looks as though it goes back to the
5825 introduction of TLS in release 3.20, but "sometimes" must have been rare
5826 because the tests only now provoked it.
5828 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5829 (this can affect the format of dates).
5831 47. exim_tidydb, when checking for the continued existence of a message for
5832 which it has found a message-specific retry record, was not finding
5833 messages that were in split spool directories. Consequently, it was
5834 deleting retry records that should have stayed in existence.
5836 48. Steve fixed some bugs in eximstats.
5838 49. The SPA authentication driver was not abandoning authentication and moving
5839 on to the next authenticator when an expansion was forced to fail,
5840 contradicting the general specification for all authenticators. Instead it
5841 was generating a temporary error. It now behaves as specified.
5843 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5844 (the order specifies the preference for clients). The order is now AES256,
5845 AES128, 3DES, ARCFOUR128.
5847 51. Small patch to Sieve code - explicitly set From: when generating an
5850 52. Exim crashed if a remote delivery caused a very long error message to be
5851 recorded - for instance if somebody sent an entire SpamAssassin report back
5852 as a large number of 550 error lines. This bug was coincidentally fixed by
5853 increasing the size of one of Exim's internal buffers (big_buffer) that
5854 happened as part of the Exiscan merge. However, to be on the safe side, I
5855 have made the code more robust (and fixed the comments that describe what
5858 53. Now that there can be additional text after "Completed" in log lines (if
5859 the queue_time_overall log selector is set), a one-byte patch to exigrep
5860 was needed to allow it to recognize "Completed" as not the last thing in
5863 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5864 patch that reportedly fixes this has been added. I am not expert enough to
5865 create a test for it. This is what the patch creator wrote:
5867 "I found a little strange behaviour of ldap code when working with
5868 Windows 2003 AD Domain, where users was placed in more than one
5869 Organization Units. When I tried to give exim partial DN, the exit code
5870 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5871 But simultaneously result of request was absolutely normal ldap result,
5872 so I produce this patch..."
5874 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5875 REFERENCE, so I have modified the code to exclude the patch when that macro
5878 55. Some experimental protocols are using DNS PTR records for new purposes. The
5879 keys for these records are domain names, not reversed IP addresses. The
5880 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5881 leaves it alone. Component reversal etc. now happens only for IP addresses.
5884 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5886 57. Double the size of the debug message buffer (to 2048) so that more of very
5887 long debug lines gets shown.
5889 58. The exicyclog utility now does better if the number of log files to keep
5890 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5892 59. Two changes related to the smtp_active_hostname option:
5894 (1) $smtp_active_hostname is now available as a variable.
5895 (2) The default for smtp_banner uses $smtp_active_hostname instead
5896 of $primary_hostname.
5898 60. The host_aton() function is supposed to be passed a string that is known
5899 to be a valid IP address. However, in the case of IPv6 addresses, it was
5900 not checking this. This is a hostage to fortune. Exim now panics and dies
5901 if the condition is not met. A case was found where this could be provoked
5902 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5903 components; fortuitously, this particular loophole had already been fixed
5904 by change 4.50/55 above.
5906 If there are any other similar loopholes, the new check in host_aton()
5907 itself should stop them being exploited. The report I received stated that
5908 data on the command line could provoke the exploit when Exim was running as
5909 exim, but did not say which command line option was involved. All I could
5910 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5911 running as the user.
5914 61. There was a buffer overflow vulnerability in the SPA authentication code
5915 (which came originally from the Samba project). I have added a test to the
5916 spa_base64_to_bits() function which I hope fixes it.
5919 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5920 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5922 63. The daemon start-up calls getloadavg() while still root for those OS that
5923 need the first call to be done as root, but it missed one case: when
5924 deliver_queue_load_max is set with deliver_drop_privilege. This is
5925 necessary for the benefit of the queue runner, because there is no re-exec
5926 when deliver_drop_privilege is set.
5928 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5929 This has been fixed.
5931 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5932 was in use, was not putting the data itself into the right store pool;
5933 consequently, it could be overwritten for a subsequent message in the same
5934 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5937 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5939 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5940 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5941 the function were treating the return as a boolean value, which happened to
5942 work because 0=false and not-0=true, but is not correct code.
5944 68. The host_aton() function was not handling scoped IPv6 addresses (those
5945 with, for example, "%eth0" on the end) correctly.
5947 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5948 negated items (that is, ~something) in unsigned ints. Some compilers
5949 apparently mutter when there is no cast.
5951 70. If an address verification called from an ACL failed, and did not produce a
5952 user-specific message (i.e. there was only a "system" message), nothing was
5953 put in $acl_verify_message. In this situation, it now puts the system
5956 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5957 session; change 4.31/43 added the unwanted input to the log line - except
5958 that it did not do this in the start of session case. It now does.
5960 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5961 This is wrong and can cause the other end to generate a synchronization
5962 error if it is another Exim or anything else that does the synchronization
5963 check. A QUIT command is no longer sent after a timeout.
5965 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5966 during host lookups.
5968 74. The defer_ok option of callout verification was not working if it was used
5969 when verifying addresses in header lines, that is, for this case:
5971 verify = header_sender/callout=defer_ok
5973 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5974 those file descriptors could be used for SMTP connections. If anything
5975 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5976 could be sent to the SMTP client, causing chaos. The daemon now opens
5977 stdin, stdout, and stderr to /dev/null when it puts itself into the
5980 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5981 log by default. The user can override this with suitable Perl magic.
5983 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5984 the log message when discard triggers, was not working for the DATA ACL or
5985 for the non-SMTP ACL.
5987 78. Error message wording change in sieve.c.
5989 79. If smtp_accept_max_per_host was set, the number of connections could be
5990 restricted to fewer than expected, because the daemon was trying to set up
5991 a new connection before checking whether the processes handling previous
5992 connections had finished. The check for completed processes is now done
5993 earlier. On busy systems, this bug wouldn't be noticed because something
5994 else would have woken the daemon, and it would have reaped the completed
5997 80. If a message was submitted locally by a user whose login name contained one
5998 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5999 It caused a spool format error. I have fixed the spool reading code. A
6000 related problem was that the "from" clause in the Received: line became
6001 illegal because of the space(s). It is now covered by ${quote_local_part.
6003 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6006 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6008 83. Patch from Sieve maintainer to fix unterminated string problem in
6009 "vacation" handling.
6011 84. Some minor changes to the Linux configuration files to help with other
6012 OS variants using glibc.
6014 85. One more patch for Sieve to update vacation handling to latest spec.
6017 ----------------------------------------------------
6018 See the note above about the 4.44 and 4.50 releases.
6019 ----------------------------------------------------
6025 1. Change 4.43/35 introduced a bug that caused file counts to be
6026 incorrectly computed when quota_filecount was set in an appendfile
6029 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6030 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6033 3. Give more explanation in the error message when the command for a transport
6034 filter fails to execute.
6036 4. There are several places where Exim runs a non-Exim command in a
6037 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6038 was being done only for the command run by the queryprogram router. It is
6039 now done for all such subprocesses. The other cases are: ${run, transport
6040 filters, and the commands run by the lmtp and pipe transports.
6042 5. Some older OS have a limit of 256 on the maximum number of file
6043 descriptors. Exim was using setrlimit() to set 1000 as a large value
6044 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6045 systems. I've change it so that if it can't get 1000, it tries for 256.
6047 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6048 was an oversight, and furthermore, ever since the addition of extra
6049 controls (e.g. 4.43/32), the checks on when to allow different forms of
6050 "control" were broken. There should now be diagnostics for all cases when a
6051 control that does not make sense is encountered.
6053 7. $recipients is now available in the predata ACL (oversight).
6055 8. Tidy the search cache before the fork to do a delivery from a message
6056 received from the command line. Otherwise the child will trigger a lookup
6057 failure and thereby defer the delivery if it tries to use (for example) a
6058 cached ldap connection that the parent has called unbind on.
6060 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6061 of $address_data from the recipient verification was clobbered by the
6062 sender verification.
6064 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6065 was its contents. (It was OK if the option was not defined at all.)
6067 11. A "Completed" log line is now written for messages that are removed from
6068 the spool by the -Mrm option.
6070 12. $host_address is now set to the target address during the checking of
6071 ignore_target_hosts.
6073 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6074 being passed; this would have caused $sender_host_name to have been used if
6075 matching the list had actually called for a host name (not very likely,
6076 since this list is usually IP addresses). A host name is now passed as
6079 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6080 code that specifies a non-restarting handler (typically sigaction() in
6081 modern systems) in an attempt to fix a rare and obscure crash bug.
6083 15. Narrowed the window for a race in the daemon that could cause it to ignore
6084 SIGCHLD signals. This is not a major problem, because they are used only to
6085 wake it up if nothing else does.
6087 16. A malformed maildirsize file could cause Exim to calculate negative values
6088 for the mailbox size or file count. Odd effects could occur as a result.
6089 The maildirsize information is now recalculated if the size or filecount
6092 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6093 support for a long time. Removed HAVE_SYS_VFS_H.
6095 18. Updated exipick to current release from John Jetmore.
6097 19. Allow an empty sender to be matched against a lookup in an address list.
6098 Previously the only cases considered were a regular expression, or an
6101 20. Exim went into a mad DNS lookup loop when doing a callout where the
6102 host was specified on the transport, if the DNS lookup yielded more than
6105 21. The RFC2047 encoding function was originally intended for short strings
6106 such as real names; it was not keeping to the 75-character limit for
6107 encoded words that the RFC imposes. It now respects the limit, and
6108 generates multiple encoded words if necessary. To be on the safe side, I
6109 have increased the buffer size for the ${rfc2047: expansion operator from
6112 22. Failure to deliver a bounce message always caused it to be frozen, even if
6113 there was an errors_to setting on the router. The errors_to setting is now
6116 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6117 canonical form (fully expanded) before being placed in
6118 $sender_host_address.
6120 24. Updated eximstats to version 1.33
6122 25. Include certificate and key file names in error message when GnuTLS fails
6123 to set them up, because the GnuTLS error message doesn't include the name
6124 of the failing file when there is a problem reading it.
6126 26. Expand error message when OpenSSL has problems setting up cert/key files.
6129 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6130 (this can affect the format of dates).
6132 28. exim_tidydb, when checking for the continued existence of a message for
6133 which it has found a message-specific retry record, was not finding
6134 messages that were in split spool directories. Consequently, it was
6135 deleting retry records that should have stayed in existence.
6137 29. eximstats updated to version 1.35
6138 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6139 1.35 - bugfix such that pie charts by volume are generated correctly
6141 30. The SPA authentication driver was not abandoning authentication and moving
6142 on to the next authenticator when an expansion was forced to fail,
6143 contradicting the general specification for all authenticators. Instead it
6144 was generating a temporary error. It now behaves as specified.
6146 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6147 (the order specifies the preference for clients). The order is now AES256,
6148 AES128, 3DES, ARCFOUR128.
6150 31. Small patch to Sieve code - explicitly set From: when generating an
6153 32. Exim crashed if a remote delivery caused a very long error message to be
6154 recorded - for instance if somebody sent an entire SpamAssassin report back
6155 as a large number of 550 error lines. This bug was coincidentally fixed by
6156 increasing the size of one of Exim's internal buffers (big_buffer) that
6157 happened as part of the Exiscan merge. However, to be on the safe side, I
6158 have made the code more robust (and fixed the comments that describe what
6161 33. Some experimental protocols are using DNS PTR records for new purposes. The
6162 keys for these records are domain names, not reversed IP addresses. The
6163 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6164 leaves it alone. Component reversal etc. now happens only for IP addresses.
6167 34. The host_aton() function is supposed to be passed a string that is known
6168 to be a valid IP address. However, in the case of IPv6 addresses, it was
6169 not checking this. This is a hostage to fortune. Exim now panics and dies
6170 if the condition is not met. A case was found where this could be provoked
6171 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6172 components; fortuitously, this particular loophole had already been fixed
6173 by change 4.50/55 or 4.44/33 above.
6175 If there are any other similar loopholes, the new check in host_aton()
6176 itself should stop them being exploited. The report I received stated that
6177 data on the command line could provoke the exploit when Exim was running as
6178 exim, but did not say which command line option was involved. All I could
6179 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6180 running as the user.
6183 35. There was a buffer overflow vulnerability in the SPA authentication code
6184 (which came originally from the Samba project). I have added a test to the
6185 spa_base64_to_bits() function which I hope fixes it.
6188 36. The daemon start-up calls getloadavg() while still root for those OS that
6189 need the first call to be done as root, but it missed one case: when
6190 deliver_queue_load_max is set with deliver_drop_privilege. This is
6191 necessary for the benefit of the queue runner, because there is no re-exec
6192 when deliver_drop_privilege is set.
6194 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6195 was in use, was not putting the data itself into the right store pool;
6196 consequently, it could be overwritten for a subsequent message in the same
6197 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6200 38. Sometimes the final signoff response after QUIT could fail to get
6201 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6202 < 0 before doing a fflush(). This bug looks as though it goes back to the
6203 introduction of TLS in release 3.20, but "sometimes" must have been rare
6204 because the tests only now provoked it.
6210 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6211 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6212 Now it returns an integer. A number of calls were still expecting a T/F
6213 return. Fortuitously, in all cases, the tests worked in OK situations,
6214 which is the norm. However, things would have gone wrong on any write
6215 failures on the smtp file descriptor. This function is used when sending
6216 messages over SMTP and also when doing verify callouts.
6218 2. When Exim is called to do synchronous delivery of a locally submitted
6219 message (the -odf or -odi options), it no longer closes stderr before doing
6222 3. Implemented the mua_wrapper option.
6224 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6226 5. Implemented the functions header_remove(), header_testname(),
6227 header_add_at_position(), and receive_remove_recipient(), and exported them
6230 6. If an ACL "warn" statement specified the addition of headers, Exim already
6231 inserted X-ACL-Warn: at the start if there was no header name. However, it
6232 was not making this test for the second and subsequent header lines if
6233 there were newlines in the string. This meant that an invalid header could
6234 be inserted if Exim was badly configured.
6236 7. Allow an ACL "warn" statement to add header lines at the start or after all
6237 the Received: headers, as well as at the end.
6239 8. Added the rcpt_4xx retry error code.
6241 9. Added postmaster_mailfrom=xxx to callout verification option.
6243 10. Added mailfrom=xxxx to the callout verification option, for verify=
6246 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6247 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6249 12. Inserted some casts to stop certain compilers warning when using pointer
6250 differences as field lengths or precisions in printf-type calls (mostly
6251 affecting debugging statements).
6253 13. Added optional readline() support for -be (dynamically loaded).
6255 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6256 same clock tick as a message's arrival, so that its received time was the
6257 same as the "first fail" time on the retry record, and that message
6258 remained on the queue past the ultimate address timeout, every queue runner
6259 would try a delivery (because it was past the ultimate address timeout) but
6260 after another failure, the ultimate address timeout, which should have then
6261 bounced the address, did not kick in. This was a "< instead of <=" error;
6262 in most cases the first failure would have been in the next clock tick
6263 after the received time, and all would be well.
6265 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6266 being recognized when the domain list was tested by the match_domain
6267 condition in an expansion string.
6269 16. Added the ${str2b64: operator.
6271 17. Exim was always calling setrlimit() to set a large limit for the number of
6272 processes, without checking whether the existing limit was already
6273 adequate. (It did check for the limit on file descriptors.) Furthermore,
6274 errors from getrlimit() and setrlimit() were being ignored. Now they are
6275 logged to the main and panic logs, but Exim does carry on, to try to do its
6276 job under whatever limits there are.
6278 18. Imported PCRE 5.0.
6280 19. Trivial typo in log message " temporarily refused connection" (the leading
6283 20. If the log selector return_path_on_delivery was set and an address was
6284 redirected to /dev/null, the delivery process crashed because it assumed
6285 that a return path would always be set for a "successful" delivery. In this
6286 case, the whole delivery is bypassed as an optimization, and therefore no
6289 21. Internal re-arrangement: the function for sending a challenge and reading
6290 a response while authentication was assuming a zero-terminated challenge
6291 string. It's now changed to take a pointer and a length, to allow for
6292 binary data in such strings.
6294 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6296 23. Exim was not respecting finduser_retries when seeking the login of the
6297 uid under which it was called; it was always trying 10 times. (The default
6298 setting of finduser_retries is zero.) Also, it was sleeping after the final
6299 failure, which is pointless.
6301 24. Implemented tls_on_connect_ports.
6303 25. Implemented acl_smtp_predata.
6305 26. If the domain in control=submission is set empty, Exim assumes that the
6306 authenticated id is a complete email address when it generates From: or
6307 Sender: header lines.
6309 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6310 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6311 chown and chgrp in /bin and hostname in /usr/bin.
6313 28. Exim was keeping the "process log" file open after each use, just as it
6314 does for the main log. This opens the possibility of it remaining open for
6315 long periods when the USR1 signal hits a daemon. Occasional processlog
6316 errors were reported, that could have been caused by this. Anyway, it seems
6317 much more sensible not to leave this file open at all, so that is what now
6320 29. The long-running daemon process does not normally write to the log once it
6321 has entered its main loop, and it closes the log before doing so. This is
6322 so that log files can straightforwardly be renamed and moved. However,
6323 there are a couple of unusual error situations where the daemon does write
6324 log entries, and I had neglected to close the log afterwards.
6326 30. The text of an SMTP error response that was received during a remote
6327 delivery was being truncated at 512 bytes. This is too short for some of
6328 the long messages that one sometimes sees. I've increased the limit to
6331 31. It is now possible to make retry rules that apply only when a message has a
6332 specific sender, in particular, an empty sender.
6334 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6335 it possible to be selective about when SMTP synchronization is enforced.
6337 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6339 32. Implemented hosts_connection_nolog.
6341 33. Added an ACL for QUIT.
6343 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6346 35. Added mailbox_size and mailbox_filecount to appendfile.
6348 36. Added control = no_multiline_responses to ACLs.
6350 37. There was a bug in the logic of the code that waits for the clock to tick
6351 in the case where the clock went backwards by a substantial amount such
6352 that the microsecond fraction of "now" was more than the microsecond
6353 fraction of "then" (but the whole seconds number was less).
6355 38. Added support for the libradius Radius client library this is found on
6356 FreeBSD (previously only the radiusclient library was supported).
6362 1. When certain lookups returned multiple values in the form name=value, the
6363 quoting of the values was not always being done properly. Specifically:
6364 (a) If the value started with a double quote, but contained no whitespace,
6366 (b) If the value contained whitespace other than a space character (i.e.
6367 tabs or newlines or carriage returns) it was not quoted.
6368 This fix has been applied to the mysql and pgsql lookups by writing a
6369 separate quoting function and calling it from the lookup code. The fix
6370 should probably also be applied to nisplus, ibase and oracle lookups, but
6371 since I cannot test any of those, I have not disturbed their existing code.
6373 2. A hit in the callout cache for a specific address caused a log line with no
6374 reason for rejecting RCPT. Now it says "Previous (cached) callout
6375 verification failure".
6377 3. There was an off-by-one bug in the queryprogram router. An over-long
6378 return line was truncated at 256 instead of 255 characters, thereby
6379 overflowing its buffer with the terminating zero. As well as fixing this, I
6380 have increased the buffer size to 1024 (and made a note to document this).
6382 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6383 when Exim is waiting for an SMTP response from a remote server, Exim
6384 restarts its select() call on the socket, thereby resetting its timeout.
6385 This is not a problem when such interrupts are rare. Somebody set up a cron
6386 job to run exiwhat every 2 minutes, which is less than the normal select()
6387 timeout (5 or 10 minutes). This meant that the select() timeout never
6388 kicked in because it was always reset. I have fixed this by comparing the
6389 time when an interrupt arrives with the time at the start of the first call
6390 to select(). If more time than the timeout has elapsed, the interrupt is
6391 treated as a timeout.
6393 5. Some internal re-factoring in preparation for the addition of Sieve
6394 extensions (by MH). In particular, the "personal" test is moved to a
6395 separate function, and given an option for scanning Cc: and Bcc: (which is
6396 not set for Exim filters).
6398 6. When Exim created an email address using the login of the caller as the
6399 local part (e.g. when creating a From: or Sender: header line), it was not
6400 quoting the local part when it contained special characters such as @.
6402 7. Installed new OpenBSD configuration files.
6404 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6405 try to make them clearer.
6407 9. Callout options, other than the timeout value, were being ignored when
6408 verifying sender addresses in header lines. For example, when using
6410 verify = header_sender/callout=no_cache
6412 the cache was (incorrectly) being used.
6414 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6415 only the Cygwin environment.
6417 11. When return_path_on_delivery was set as a log selector, if different remote
6418 addresses in the same message used different return paths and parallel
6419 remote delivery occurred, the wrong values would sometimes be logged.
6420 (Whenever a remote delivery process finished, the return path value from
6421 the most recently started remote delivery process was logged.)
6423 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6424 lines when AUTH and/or TLS are in use. This is the "received protocol"
6425 field. Exim used to use "asmtp" for authenticated SMTP, without any
6426 indication (in the protocol name) for TLS use. Now it follows the RFC and
6427 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6428 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6429 names appear in log lines as well as in Received: header lines.
6431 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6432 extensions, and comparison tests, and to fix some bugs.
6434 14. Changes to the "personal" filter test:
6436 (1) The test was buggy in that it was just doing the equivalent of
6437 "contains" tests on header lines. For example, if a user's address was
6438 anne@some.where, the "personal" test would incorrectly be true for
6440 To: susanne@some.where
6442 This test is now done by extracting each address from the header in turn,
6443 and checking the entire address. Other tests that are part of "personal"
6444 are now done using regular expressions (for example, to check local parts
6445 of addresses in From: header lines).
6447 (2) The list of non-personal local parts in From: addresses has been
6448 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6449 taken from the Sieve specification recommendations.
6451 (3) If the message contains any header line starting with "List-" it is
6452 treated as non-personal.
6454 (4) The test for "circular" in the Subject: header line has been removed
6455 because it now seems ill-conceived.
6457 15. Minor typos in src/EDITME comments corrected.
6459 16. Installed latest exipick from John Jetmore.
6461 17. If headers_add on a router specified a text string that was too long for
6462 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6463 of string_sprintf() is now avoided.
6465 18. $message_body_size was not set (it was always zero) when running the DATA
6466 ACL and the local_scan() function.
6468 19. For the "mail" command in an Exim filter, no default was being set for
6469 the once_repeat time, causing a random time value to be used if "once" was
6470 specified. (If the value happened to be <= 0, no repeat happened.) The
6471 default is now 0s, meaning "never repeat". The "vacation" command was OK
6472 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6473 (I found it when inspecting the code).
6475 20. There is now an overall timeout for performing a callout verification. It
6476 defaults to 4 times the callout timeout, which applies to individual SMTP
6477 commands during the callout. The overall timeout applies when there is more
6478 than one host that can be tried. The timeout is checked before trying the
6479 next host. This prevents very long delays if there are a large number of
6480 hosts and all are timing out (e.g. when the network connections are timing
6481 out). The value of the overall timeout can be changed by specifying an
6482 additional sub-option for "callout", called "maxwait". For example:
6484 verify = sender/callout=5s,maxwait=20s
6486 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6487 to the end before writing, but this should make it even safer).
6489 22. Exim was forgetting that it had advertised PIPELINING for the second and
6490 subsequent messages on an SMTP connection. It was also not resetting its
6491 memory on STARTTLS and an internal HELO.
6493 23. When Exim logs an SMTP synchronization error within a session, it now
6494 records whether PIPELINING has been advertised or not.
6496 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6497 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6498 rather than long int.
6500 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6502 26. Added the never_mail option to autoreply.
6508 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6509 crash if the getsockname() call failed; this can happen if a connection is
6510 closed very soon after it is established. The problem was simply in the
6511 order in which certain operations were done, causing Exim to try to write
6512 to the SMTP stream before it had set up the file descriptor. The bug has
6513 been fixed by making things happen in the correct order.
6519 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6520 before the connection was closed, thus losing the rejection response.
6522 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6523 some early Solaris releases, but causes trouble in current releases where
6524 socklen_t is defined.
6526 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6529 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6532 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6533 that releasing the top of it at the end releases what was used for sub-
6534 expansions (unless the block got too big). However, discard this block if
6535 the first thing is a variable or header, so that we can use its block when
6536 it is dynamic (useful for very large $message_headers, for example).
6538 6. Lookups now cache *every* query, not just the most recent. A new, separate
6539 store pool is used for this. It can be recovered when all lookup caches are
6540 flushed. Lookups now release memory at the end of their result strings.
6541 This has involved some general refactoring of the lookup sources.
6543 7. Some code has been added to the store_xxx() functions to reduce the amount
6544 of flapping under certain conditions.
6546 8. log_incoming_interface used to affect only the <= reception log lines. Now
6547 it causes the local interface and port to be added to several more SMTP log
6548 lines, for example "SMTP connection from", and rejection lines.
6550 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6552 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6554 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6555 could be overwritten at the end of the current message (or the start of a
6556 new message if it was set in a HELO ACL). The value is now preserved for
6557 the duration of the SMTP connection.
6559 12. If a transport had a headers_rewrite setting, and a matching header line
6560 contained an unqualified address, that address was qualified, even if it
6561 did not match any rewriting rules. The underlying bug was that the values
6562 of the flags that permit the existence of unqualified sender and recipient
6563 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6564 non-local messages, and by -bnq for local messages) were not being
6565 preserved with the message after it was received.
6567 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6568 "next input=" as part of the text comprising the host identity instead of
6569 the correct text. The code was using the same buffer for two different
6570 strings. However, depending on which order the printing function evaluated
6571 its arguments, the bug did not always show up. Under Linux, for example, my
6572 test suite worked just fine.
6574 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6575 doesn't work with some older versions of Perl. It has been changed to "my",
6576 which in any case is probably the better facility to use.
6578 15. A really picky compiler found some instances of statements for creating
6579 error messages that either had too many or two few arguments for the format
6582 16. The size of the buffer for calls to the DNS resolver has been increased
6583 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6584 for addresses that have a lot of PTR records. This alleviates a problem; it
6585 does not fully solve it.
6587 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6588 buffer now truncates the list and logs the incident, which is the same
6589 action as happens when Exim is looking up a host name and its aliases.
6590 Previously in this situation something unpredictable would happen;
6591 sometimes it was "internal error: store_reset failed".
6593 18. If a server dropped the connection unexpectedly when an Exim client was
6594 using GnuTLS and trying to read a response, the client delivery process
6595 crashed while trying to generate an error log message.
6597 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6598 string, for example:
6600 warn message = H1: something\nH2: something
6602 the text was added as a single header line from Exim's point of view
6603 though it ended up OK in the delivered message. However, searching for the
6604 second and subsequent header lines using $h_h2: did not work. This has been
6605 fixed. Similarly, if a system filter added multiple headers in this way,
6606 the routers could not see them.
6608 20. Expanded the error message when iplsearch is called with an invalid key to
6609 suggest using net-iplsearch in a host list.
6611 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6612 ACLs are no longer actually imposed (and a message to that effect is
6615 22. If a "gecos" field in a passwd entry contained escaped characters, in
6616 particular, if it contained a \" sequence, Exim got it wrong when building
6617 a From: or a Sender: header from that name. A second bug also caused
6618 incorrect handling when an unquoted " was present following a character
6619 that needed quoting.
6621 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6622 was not being matched caselessly.
6624 24. Arranged for all hyphens in the exim.8 source to be escaped with
6627 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6628 properly. Recipient callout cache records were still being keyed to include
6629 the sender, even when use_sender was set false. This led to far more
6630 callouts that were necessary. The sender is no longer included in the key
6631 when use_sender is false.
6633 26. Added "control = submission" modifier to ACLs.
6635 27. Added the ${base62d: operator to decode base 62 numbers.
6637 28. dnsdb lookups can now access SRV records.
6639 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6640 the configuration file.
6642 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6643 (-v) mode. This makes the output for a verbose queue run more intelligible.
6645 31. Added a use_postmaster feature to recipient callouts.
6647 32. Added the $body_zerocount variable, containing the number of binary zero
6648 bytes in the message body.
6650 33. The time of last modification of the "new" subdirectory is now used as the
6651 "mailbox time last read" when there is a quota error for a maildir
6654 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6656 35. Added +ignore_unknown as a special item in host lists.
6658 36. Code for decoding IPv6 addresses in host lists is now included, even if
6659 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6660 address was recognized as an IP address, but was then not correctly decoded
6661 into binary, causing unexpected and incorrect effects when compared with
6668 1. Very minor rewording of debugging text in manualroute to say "list of
6669 hosts" instead of "hostlist".
6671 2. If verify=header_syntax was set, and a header line with an unqualified
6672 address (no domain) and a large number of spaces between the end of the
6673 name and the colon was received, the reception process suffered a buffer
6674 overflow, and (when I tested it) crashed. This was caused by some obsolete
6675 code that should have been removed. The fix is to remove it!
6677 3. When running in the test harness, delay a bit after writing a bounce
6678 message to get a bit more predictability in the log output.
6680 4. Added a call to search_tidyup() just before forking a reception process. In
6681 theory, someone could use a lookup in the expansion of smtp_accept_max_
6682 per_host which, without the tidyup, could leave open a database connection.
6684 5. Added the variables $recipient_data and $sender_data which get set from a
6685 lookup success in an ACL "recipients" or "senders" condition, or a router
6686 "senders" option, similar to $domain_data and $local_part_data.
6688 6. Moved the writing of debug_print from before to after the "senders" test
6691 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6692 problems for message scanning, either using a data ACL, or using
6693 local_scan() because the Received: header was not generated till after they
6694 were called (in order to set the time as the time of reception completion).
6695 I have revised the way this works. The header is now generated after the
6696 body is received, but before the ACL or local_scan() are called. After they
6697 are run, the timestamp in the header is updated.
6703 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6704 before starting a queue runner without re-exec. This happened only when
6705 deliver_drop_privilege was set or when the Exim user was set to root. The
6706 effect of the bug was that timeouts during subsequent deliveries caused
6707 crashes instead of being properly handled. The handler is now left at its
6708 default (and expected) setting.
6710 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6711 message, again when deliver_drop_privilege is set or Exim is run as root.
6712 The bug described in (1) was not present in this case, but the tidying up
6713 of the other signals was missing. I have made the two cases consistent.
6715 3. The ignore_target_hosts setting on a manualroute router was being ignored
6716 for hosts that were looked up using the /MX notation.
6718 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6721 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6722 operated on the sender address. After changing the $sender_address to <>
6723 for the sender address verify, Exim was re-instated it as the original
6724 (before rewriting) address, but remembering that it had rewritten it, so it
6725 wasn't rewriting it again. This bug also had the effect of breaking the
6726 sender address verification caching when the sender address was rewritten.
6728 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6729 This has been changed so that if the ip literal address matches
6730 ignore_target_hosts, the router declines.
6732 7. Added expansion conditions match_domain, match_address, and match_local_
6733 part (NOT match_host).
6735 8. The placeholder for the Received: header didn't have a length field set.
6737 9. Added code to Exim itself and to exim_lock to test for a specific race
6738 condition that could lead to file corruption when using MBX delivery. The
6739 issue is with the lockfile that is created in /tmp. If this file is removed
6740 after a process has opened it but before that process has acquired a lock,
6741 there is the potential for a second process to recreate the file and also
6742 acquire a lock. This could lead to two Exim processes writing to the file
6743 at the same time. The added code performs the same test as UW imapd; it
6744 checks after acquiring the lock that its file descriptor still refers to
6745 the same named file.
6747 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6748 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6751 11. Added the smtp_active_hostname option. If used, this will typically be made
6752 to depend on the incoming interface address. Because $interface_address is
6753 not set up until the daemon has forked a reception process, error responses
6754 that can happen earlier (such as "too many connections") no longer contain
6757 12. If an expansion in a condition on a "warn" statement fails because a lookup
6758 defers, the "warn" statement is abandoned, and the next ACL statement is
6759 processed. Previously this caused the whole ACL to be aborted.
6761 13. Added the iplsearch lookup type.
6763 14. Added ident_timeout as a log selector.
6765 15. Added tls_certificate_verified as a log selector.
6767 16. Added a global option tls_require_ciphers (compare the smtp transport
6768 option of the same name). This controls incoming TLS connections.
6770 17. I finally figured out how to make tls_require_ciphers do a similar thing
6771 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6772 before starting the TLS session.
6774 18. Tabs are now shown as \t in -bP output.
6776 19. If the log selector return_path_on_delivery was set, Exim crashed when
6777 bouncing a message because it had too many Received: header lines.
6779 20. If two routers both had headers_remove settings, and the first one included
6780 a superfluous trailing colon, the final name in the first list and the
6781 first name in the second list were incorrectly joined into one item (with a
6782 colon in the middle).
6788 1. Added -C and -D options to the exinext utility, mainly to make it easier
6789 to include in the automated testing, but these could be helpful when
6790 multiple configurations are in use.
6792 2. The exinext utility was not formatting the output nicely when there was
6793 an alternate port involved in the retry record key, nor when there was a
6794 message id as well (for retries that were specific to a specific message
6795 and a specific host). It was also confused by IPv6 addresses, because of
6796 the additional colons they contain. I have fixed the IPv4 problem, and
6797 patched it up to do a reasonable job for IPv6.
6799 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6800 delivery, the log line now contains "pipelined" if PIPELINING was used.
6802 4. An SMTP transport process used to panic and die if the bind() call to set
6803 an explicit outgoing interface failed. This has been changed; it is now
6804 treated in the same way as a connect() failure.
6806 5. A reference to $sender_host_name in the part of a conditional expansion
6807 that was being skipped was still causing a DNS lookup. This no longer
6810 6. The def: expansion condition was not recognizing references to header lines
6811 that used bh_ and bheader_.
6813 7. Added the _cache feature to named lists.
6815 8. The code for checking quota_filecount in the appendfile transport was
6816 allowing one more file than it should have been.
6818 9. For compatibility with Sendmail, the command line option
6826 and sets the incoming protocol and host name (for trusted callers). The
6827 host name and its colon can be omitted when only the protocol is to be set.
6828 Note the Exim already has two private options, -pd and -ps, that refer to
6829 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6830 "s", but I don't think that's a major issue.
6832 10. A number of refactoring changes to the code, none of which should affect
6835 (a) The number of logging options was getting close to filling up the
6836 32-bit word that was used as a bit map. I have split them into two classes:
6837 those that are passed in the argument to log_write(), and those that are
6838 only ever tested independently outside of that function. These are now in
6839 separate 32-bit words, so there is plenty of room for expansion again.
6840 There is no change in the user interface or the logging behaviour.
6842 (b) When building, for example, log lines, the code previously used a
6843 macro that called string_cat() twice, in order to add two strings. This is
6844 not really sufficiently general. Furthermore, there was one instance where
6845 it was actually wrong because one of the argument was used twice, and in
6846 one call a function was used. (As it happened, calling the function twice
6847 did not affect the overall behaviour.) The macro has been replaced by a
6848 function that can join an arbitrary number of extra strings onto a growing
6851 (c) The code for expansion conditions now uses a table and a binary chop
6852 instead of a serial search (which was left over from when there were very
6853 few conditions). Also, it now recognizes conditions like "pam" even when
6854 the relevant support is not compiled in: a suitably worded error message is
6855 given if an attempt is made to use such a condition.
6857 11. Added ${time_interval:xxxxx}.
6859 12. A bug was causing one of the ddress fields not to be passed back correctly
6860 from remote delivery subprocesses. The field in question was not being
6861 subsequently used, so this caused to problems in practice.
6863 13. Added new log selectors queue_time and deliver_time.
6865 14. Might have fixed a bug in maildirsizefile handling that threw up
6866 "unexpected character" debug warnings, and recalculated the data
6867 unnecessarily. In any case, I expanded the warning message to give more
6870 15. Added the message "Restricted characters in address" to the statements in
6871 the default ACL that block characters like @ and % in local parts.
6873 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6874 Three changes have been made:
6876 (a) There was a serious bug; a negative response to MAIL caused the whole
6877 recipient domain to be cached as invalid, thereby blocking all messages
6878 to all local parts at the same domain, from all senders. This bug has
6879 been fixed. The domain is no longer cached after a negative response to
6880 MAIL if the sender used is not empty.
6882 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6885 (c) A new callout option, "use_sender" has been added for people who want
6886 the modified behaviour.
6892 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6895 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6896 indeed breaks things for older releases.
6898 3. Added additional logging to the case where there is a problem reading data
6899 from a filter that is running in a subprocess using a pipe, in order to
6900 try to track down a specific problem.
6902 4. Testing facility fudge: when running in the test harness and attempting
6903 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6904 getting "No route to host". Convert this to a timeout.
6906 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6909 6. Some OS don't have socklen_t but use size_t instead. This affects the
6910 fifth argument of getsockopt() amongst other things. This is now
6911 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6912 can be set for individual OS. I have set it for SunOS5, OSF1, and
6913 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6914 some earlier ones do not.
6916 7. Change 4.30/15 was not doing the test caselessly.
6918 8. The standard form for an IPv6 address literal was being rejected by address
6919 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6920 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6921 this, as well as the form without the "IPv6" on the front (but only when
6922 address literals are enabled, of course).
6924 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6926 10. Exim crashed if a message with an empty sender address specified by -f
6927 encountered a router with an errors_to setting. This could be provoked only
6928 by a command such as
6932 where an empty string was supplied; "<>" did not hit this bug.
6934 11. Installed PCRE release 4.5.
6936 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6937 remained set. It is now erased.
6939 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6940 times from message ids (which are base 36 rather than the normal 62).
6942 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6943 were being counted as actual protocol errors, and logged if the log
6944 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6945 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6946 and DATA following a set of rejected RCPTs do not count as protocol errors.
6947 In other words, Exim assumes they were pipelined, though this may not
6948 actually be the case. Of course, in all cases the client gets an
6949 appropriate error code.
6951 15. If a lookup fails in an ACL condition, a message about the failure may
6952 be available; it is used if testing the ACL cannot continue, because most
6953 such messages specify what the cause of the deferral is. However, some
6954 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6955 that caused an old message to be retained and used if a later statement
6956 caused a defer, replacing the real cause of the deferral.
6958 16. If an IP address had so many PTR records that the DNS lookup buffer
6959 was not large enough to hold them, Exim could crash while trying to process
6960 the truncated data. It now detects and logs this case.
6962 17. Further to 4.21/58, another change has been made: if (and only if) the
6963 first line of a message (the first header line) ends with CRLF, a bare LF
6964 in a subsequent header line has a space inserted after it, so as not to
6965 terminate the header.
6967 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6968 unnecessarily, used atoi() instead of strtol(), and didn't check the
6969 termination when getting file sizes from file names by regex.
6971 19. Completely re-implemented the support for maildirsize files, in the light
6972 of a number of problems with the previous contributed implementation
6973 (4.30/29). In particular:
6975 . If the quota is zero, the maildirsize file is maintained, but no quota is
6978 . If the maildir directory does not exist, it is created before any attempt
6979 to write a maildirsize file.
6981 . The quota value in the file is just a cache; if the quota is changed in
6982 the transport, the new value overrides.
6984 . A regular expression is available for excluding directories from the
6987 20. The autoreply transport checks the characters in options that define the
6988 message's headers; it allows continued headers, but it was checking with
6989 isspace() after an embedded newline instead of explicitly looking for a
6992 21. If all the "regular" hosts to which an address was routed had passed their
6993 expiry times, and had not reached their retry times, the address was
6994 bounced, even if fallback hosts were defined. Now Exim should go on to try
6997 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6998 equivalent code in the SMTP transport. Some hosts send humungous responses
6999 to HELO/EHLO, more than 1024 it seems.
7001 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7002 gives compiler warnings in some environments. I've now done it "properly",
7005 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7006 (because of problems with the built-in one) was declared to return uschar *
7007 instead of char *, causing compiler failure.
7009 25. Fixed a file descriptor leak when processing alias/forward files.
7011 26. Fixed a minor format string issue in dbfn.c.
7013 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7015 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7016 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7019 29. When a sender address is verified, it is cached, to save repeating the test
7020 when there is more than one recipient in a message. However, when the
7021 verification involves a callout, it is possible for different callout
7022 options to be set for different recipients. It is too complicated to keep
7023 track of this in the cache, so now Exim always runs a verification when a
7024 callout is required, relying on the callout cache for the optimization.
7025 The overhead is duplication of the address routing, but this should not be
7028 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7029 to be verified with callout=postmaster, and the main callout worked but the
7030 postmaster check failed, the verification correctly failed. However, if a
7031 subsequent RCPT command asked for sender verification *without* the
7032 postmaster check, incorrect caching caused this verification also to fail,
7035 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7036 it was not caching the DNS options (qualify_single, search_parents) that
7037 were used when the lookup failed. A subsequent lookup with different
7038 options therefore always gave the same answer, though there were cases
7039 where it should not have. (Example: a "domains = !$mx_any" option on a
7040 dnslookup router: the "domains" option is always processed without any
7041 widening, but the router might have qualify_single set.) Now Exim uses the
7042 cached value only when the same options are set.
7044 32. Added John Jetmore's "exipick" utility to the distribution.
7046 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7047 than a timeout (e.g. a certificate is required, and is not provided), an
7048 Exim server now closes the connection immediately. Previously it waited for
7049 the client to close - but if the client is SSL, it seems that they each
7050 wait for each other, leading to a delay before one of them times out.
7052 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7053 maintained 0.8.x compatibility because I don't think many are using it, and
7054 it is clearly obsolete.
7056 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7059 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7060 client certificate was expired. A simple patch fixes this, though I don't
7061 understand the full logic of why the verify callback is called multiple
7064 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7065 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7066 which causes problems with some clients (such as the Certicom SSL Plus
7067 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7068 disables the coutermeasure allowing Eudora to connect."
7070 38. Exim was not checking that a write() to a log file succeeded. This could
7071 lead to Bad Things if a log got too big, in particular if it hit a file
7072 size limit. Exim now panics and dies if it cannot write to a log file, just
7073 as it does if it cannot open a log file.
7075 39. Modified OS/Makefile-Linux so that it now contains
7077 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7079 The two -D definitions ensure that Exim is compiled with large file
7080 support, which makes it possible to handle log files that are bigger than
7083 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7084 instance) a domain was checked against a named list that involved a lookup,
7085 causing $domain_data to be set, then another domain was checked against the
7086 same list, then the first domain was re-checked, the value of $domain_data
7087 after the final check could be wrong. In particular, if the second check
7088 failed, it could be set empty. This bug probably also applied to
7091 41. The strip_trailing_dot option was not being applied to the address given
7092 with the -f command-line option.
7094 42. The code for reading a message's header from the spool was incrementing
7095 $received_count, but never initializing it. This meant that the value was
7096 incorrect (doubled) while delivering a message in the same process in which
7097 it was received. In the most common configuration of Exim, this never
7098 happens - a fresh exec is done - but it can happen when
7099 deliver_drop_privilege is set.
7101 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7102 it now includes up to 150 characters of the unexpected data in the log
7105 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7106 and building data strings. The size of both of these buffers was 10 000
7107 bytes - far larger than anybody would *ever* want, thought I. Needless to
7108 say, somebody hit the limit. I have increased the maximum line length to
7109 20 000 and the maximum data length of concatenated lines to 100 000. I have
7110 also fixed two bugs, because there was no checking on these buffers. Tsk,
7111 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7112 buffer is too small.
7114 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7115 lsearch lookups. Now it does.
7117 46. When parsing a route_list item in a manualroute router, a fixed-length
7118 buffer was used for the list of hosts. I made this 1024 bytes long,
7119 thinking that nobody would ever have a list of hosts that long. Wrong.
7120 Somebody had a whole pile of complicated expansion conditions, and the
7121 string was silently truncated, leading to an expansion error. It turns out
7122 that it is easier to change to an unlimited length (owing to other changes
7123 that have happened since this code was originally written) than to build
7124 structure for giving a limitation error. The length of the item that
7125 expands into the list of hosts is now unlimited.
7127 47. The lsearch lookup could not handle data where the length of text line was
7128 more than 4095 characters. Such lines were truncated, leading to shortened
7129 data being returned. It should now handle lines of any length.
7131 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7132 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7135 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7136 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7137 no longer happens in comment lines. A list of replacements is now placed
7138 at the head of all of the source files, except those whose only change is
7139 to replace PERL_COMMAND in the very first #! line.
7141 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7142 messages on the queue, with a bottom-up merge sort, using code contributed
7143 by Michael Haardt. This should make operations like -bp somewhat faster on
7144 large queues. It won't affect queue runners, except when queue_run_in_order
7147 51. Installed eximstats 1.31 in the distribution.
7149 52. Added support for SRV lookups to the dnslookup router.
7151 53. If an ACL referred to $message_body or $message_body_end, the value was not
7152 reset for any messages that followed in the same SMTP session.
7154 54. The store-handling optimization for building very long strings was not
7155 differentiating between the different store pools. I don't think this
7156 actually made any difference in practice, but I've tidied it.
7158 55. While running the routers to verify a sender address, $sender_address
7159 was still set to the sender address. This is wrong, because when routing to
7160 send a bounce to the sender, it would be empty. Therefore, I have changed
7161 it so that, while verifying a sender address, $sender_address is set to <>.
7162 (There is no change to what happens when verifying a recipient address.)
7164 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7165 target A or AAAA records (if not already returned) without resetting the
7166 qualify_single or search_parents options of the DNS resolver. These are
7167 inappropriate in this case because the targets of MX and SRV records must
7168 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7169 target that, when qualified, matched something in the local domain. These
7170 two options are now turned off when doing these lookups.
7172 57. It seems that at least some releases of Reiserfs (which does not have the
7173 concept of a fixed number of inodes) returns zero and not -1 for the
7174 number of available inodes. This interacted badly with check_spool_inodes,
7175 which assumed that -1 was the "no such thing" setting. What I have done is
7176 to check that the total number of inodes is greater than zero before doing
7177 the test of how many are available.
7179 58. When a "warn" ACL statement has a log_message modifier, the message is
7180 remembered, and not repeated. This is to avoid a lot of repetition when a
7181 message has many recipients that cause the same warning to be written.
7182 However, Exim was preserving the list of already written lines for an
7183 entire SMTP session, which doesn't seem right. The memory is now reset if a
7184 new message is started.
7186 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7187 debugging output unless log_rewrite was also set.
7189 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7190 of (int)(handle) when we know that handle contains (void *)(-1).
7192 61. The Exim daemon panic-logs an error return when it closes the incoming
7193 connection. However "connection reset by peer" seems to be common, and
7194 isn't really an error worthy of noting specially, so that particular error
7197 62. When Exim is trying to find all the local interfaces, it used to panic and
7198 die if the ioctl to get the interface flags failed. However, it seems that
7199 on at least one OS (Solaris 9) it is possible to have an interface that is
7200 included in the list of interfaces, but for which you get a failure error
7201 for this call. This happens when the interface is not "plumbed" into a
7202 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7203 failure of the "get flags" call assumes that the interface is down.
7205 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7206 makes life easier for people who are doing arithmetic on fields extracted
7207 from dates, where you often get leading zeros that should not be
7208 interpreted as octal.
7210 64. Added qualify_domain to the redirect router, to override the global
7213 65. If a pathologically long header line contained very many addresses (the
7214 report of this problem mentioned 10 000) and each of them was rewritten,
7215 Exim could use up a very large amount of memory. (It kept on making new
7216 copies of the header line as it rewrote, and never released the old ones.)
7217 At the expense of a bit more processing, the header rewriting function has
7218 been changed so that it no longer eats memory in this way.
7220 66. The generation of the Received: header has been moved from the time that a
7221 message starts to be received, to the time that it finishes. The timestamp
7222 in the Received: header should now be very close to that of the <= log
7223 line. There are two side-effects of this change:
7225 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7226 logged header lines no longer include the local Received: line, because
7227 it has not yet been created. The same applies to a copy of the message
7228 that is returned to a non-SMTP sender when a message is rejected.
7230 (b) When a filter file is tested using -bf, no additional Received: header
7231 is added to the test message. After some thought, I decided that this
7234 This change does not affect the value of $received_for. It is still set
7235 after address rewriting, but before local_scan() is called.
7237 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7239 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7240 gave an unhelpful panic error message, and a defer error. I have managed to
7241 change this behaviour so that it now rejects any supplied certificate,
7242 which seems right, as the list of acceptable certificates is empty.
7244 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7245 gave an unhelpful defer error. I have not managed to make this reject any
7246 supplied certificates, but the error message it gives is "no certificate
7247 supplied", which is not helpful.
7249 70. exigrep's output now also includes lines that are not associated with any
7250 message, but which match the given pattern. Implemented by a patch from
7251 Martin Sluka, which also tidied up the Perl a bit.
7253 71. Recipient callout verification, like sender verification, was using <> in
7254 the MAIL FROM command. This isn't really the right thing, since the actual
7255 sender may affect whether the remote host accepts the recipient or not. I
7256 have changed it to use the actual sender in the callout; this means that
7257 the cache record is now keyed on a recipient/sender pair, not just the
7258 recipient address. There doesn't seem to be a real danger of callout loops,
7259 since a callout by the remote host to check the sender would use <>.
7260 [SEE ABOVE: changed after hitting problems.]
7262 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7263 temporary errors. However, in the case of such a code being given after
7264 the end of a data transmission (i.e. after ".") Exim was failing to write
7265 a retry record for the message. (Yes, there was some broken host that was
7266 actually sending 8xx at this point.)
7268 73. An unknown lookup type in a host list could cause Exim to panic-die when
7269 the list was checked. (An example that provoked this was putting <; in the
7270 middle of a list instead of at the start.) If this happened during a DATA
7271 ACL check, a -D file could be left lying around. This kind of configuration
7272 error no longer causes Exim to die; instead it causes a defer error. The
7273 incident is still logged to the main and panic logs.
7275 74. Buglet left over from Exim 3 conversion. The message "too many messages
7276 in one connection" was written to the rejectlog but not the mainlog, except
7277 when address rewriting (yes!) was being logged.
7279 75. Added write_rejectlog option.
7281 76. When a system filter was run not as root (that is, when system_filter_user
7282 was set), the values of the $n variables were not being returned to the
7283 main process; thus, they were not subsequently available in the $sn
7286 77. Added +return_path_on_delivery log selector.
7288 78. A connection timeout was being treated differently from recipients deferred
7289 when testing hosts_max_try with a message that was older than the host's
7290 retry timeout. (The host should not be counted, thus allowing all hosts to
7291 be tried at least once before bouncing.) This may have been the cause of an
7292 occasionally reported bug whereby a message would remain on the queue
7293 longer than the retry timeout, but would be bounced if a delivery was
7294 forced. I say "may" because I never totally pinned down the problem;
7295 setting up timeout/retry tests is difficult. See also the next item.
7297 79. The ultimate address timeout was not being applied to errors that involved
7298 a combination of host plus message (for example, a timeout on a MAIL
7299 command). When an address resolved to a number of possible hosts, and they
7300 were not all tried for each delivery (e.g. because of hosts_max_try), a
7301 message could remain on the queue longer than the retry timeout.
7303 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7306 81. Fixed an obscure SMTP outgoing bug which required at least the following
7307 conditions: (a) there was another message waiting for the same server;
7308 (b) the server returned 5xx to all RCPT commands in the first message so
7309 that the message was not completed; (c) the server dropped the connection
7310 or gave a negative response to the RSET that Exim sends to abort the
7311 transaction. The observed case was a dropped connection after DATA that had
7312 been sent in pipelining mode. That is, the server had advertised PIPELINING
7313 but was not implementing it correctly. The effect of the bug was incorrect
7314 behaviour, such as trying another host, and this could lead to a crash.
7320 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7321 and daemon.c were passed as pointers to ints; they should have been
7322 pointers to socklen_t variables (which are typically unsigned ints).
7324 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7327 3. Fixed a really odd bug that affected only the testing scheme; patching a
7328 certain fixed string in the binary changed the value of another string that
7329 happened to be identical to the end of the original first string.
7331 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7332 name", it returns that address as the IP address. On some operating
7333 systems (e.g. Solaris), it also passes back the IP address string as the
7334 "host name". However, on others (e.g. Linux), it passes back an empty
7335 string. Exim wasn't checking for this, and was changing the host name to an
7336 empty string, assuming it had been canonicalized.
7338 5. Although rare, it is permitted to have more than one PTR record for a given
7339 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7340 all the names associated with an address, because they do in Solaris.
7341 However, it seems that they do not in Linux for data that comes from the
7342 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7343 I found this out when I moved to a new Linux workstation and tried to run
7344 the Exim test suite.
7346 To get round this problem I have changed the code so that it now does its
7347 own call to the DNS to look up PTR records when searching for a host name.
7348 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7349 addresses that are only in /etc/hosts are still found.
7351 This behaviour is, however, controlled by an option called host_lookup_
7352 order, which defaults to "bydns:byaddr". If people want to use the other
7353 order, or indeed, just use one or the other means of lookup, they can
7354 specify it in this variable.
7356 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7357 some operating systems, this comes back from gethostbyaddr() as an empty
7358 string, and this is what Exim used to test for. However, it seems that in
7359 other systems, "." is yielded. Exim now tests for this case too.
7361 7. The values of check_spool_space and check_log_space are now held internally
7362 as a number of kilobytes instead of an absolute number of bytes. If a
7363 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7364 kilobyte. This means that much larger values can be stored.
7366 8. Exim monitor: an attempt to get the action menu when not actually pointing
7367 at a message produces an empty menu entitled "No message selected". This
7368 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7369 no entries in it ("Shell widget menu has zero width and/or height"). So I
7370 have added a single, blank menu entry in this case.
7372 9. Added ${quote_local_part.
7374 10. MIME decoding is now applied to the contents of Subject: header lines when
7377 11. Now that a reference to $sender_host_address automatically causes a reverse
7378 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7379 host lookup before query-style lookups in lists that might use this
7380 variable. This has therefore been abolished, and the "net-" prefix is no
7381 longer necessary for query-style lookups.
7383 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7384 have been a typo for LFLAGS, so it has been changed.
7386 13. The install script calls Exim with "-C /dev/null" in order to find the
7387 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7388 to be output. However, since Exim outputs its version number before the
7389 error, it didn't break the script. It just looked ugly. I fixed this by
7390 always allowing "-C /dev/null" if the caller is root.
7392 14. Ignore overlarge ACL variable number when reading spool file - insurance
7393 against a later release with more variables having written the file.
7395 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7396 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7397 this, as well as the form without the "IPv6" on the front.
7399 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7400 OS/Makefile-Darwin file.
7402 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7403 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7405 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7406 variable. However, some OS use ints for inodes. I've added cast to long int
7407 to get rid of the compiler warning.
7409 19. I had forgotten to lock out "/../" in configuration file names when
7410 ALT_CONFIG_PREFIX was set.
7412 20. Routers used for verification do not need to specify transports. However,
7413 if such a router generated a host list, and callout was configured, Exim
7414 crashed, because it could not find a port number from the (non-existent)
7415 transport. It now assumes port 25 in this circumstance.
7417 21. Added the -t option to exigrep.
7419 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7420 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7421 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7422 them is set, LOOKUP_LSEARCH is forced.
7424 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7426 24. Added sender and host information to the "rejected by local_scan()" log
7427 line; previously there was no indication of these.
7429 25. Added .include_if_exists.
7431 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7432 Linux. It turns out that not all file systems support this. Apparently some
7433 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7434 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7435 not supported on the file descriptor, is now ignored when Exim is trying to
7436 sync a directory. This applies only to Linux.
7438 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7440 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7441 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7444 29. Added support for maildirsize files from supplied patch (modified a bit).
7446 30. The use of :fail: followed by an empty string could lead Exim to respond to
7447 sender verification failures with (e.g.):
7449 550 Verification failed for <xxx>
7450 550 Sender verify failed
7452 where the first response line was missing the '-' that indicates it is not
7453 the final line of the response.
7455 31. The loop for finding the name of the user that called Exim had a hardwired
7456 limit of 10; it now uses the value of finduser_retries, which is used for
7457 all other user lookups.
7459 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7462 33. Exim was neglecting to zero errno before one call of strtol() when
7463 expanding a string and expecting an integer value. On some systems this
7464 resulted in spurious "integer overflow" errors. Also, it was casting the
7465 result into an int without checking.
7467 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7468 did not work. The code looks as if it has *never* worked, though it appears
7469 to have been documented since at least release 1.62. I have made it work.
7471 35. The "timeout_DNS" error in retry rules, also documented since at least
7472 1.62, also never worked. As it isn't clear exactly what this means, and
7473 clearly it isn't a major issue, I have abolished the feature by treating it
7474 as "timeout", and writing a warning to the main and panic logs.
7476 36. The display of retry rules for -brt wasn't always showing the error code
7479 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7480 timeout_connect_A, timeout_connect_MX.
7482 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7483 to the empty sender.
7485 39. The daemon was not analysing the content of -oX till after it had closed
7486 stderr and disconnected from the controlling terminal. This meant that any
7487 syntax errors were only noted on the panic log, and the return code from
7488 the command was 0. By re-arranging the code a little, I've made the
7489 decoding happen first, so such errors now appear on stderr, and the return
7490 code is 1. However, the actual setting up of the sockets still happens in
7491 the disconnected process, so errors there are still only recorded on the
7494 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7495 connections (as happens on some IP stacks) was logged at start up time as
7496 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7497 it from "IPv6 and IPv4", which means that two separate sockets are being
7500 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7501 says whether AF_INET or AF_INET6 was passed as an argument.
7503 42. Exiwhat output was messed up when time zones were included in log
7506 43. Exiwhat now gives more information about the daemon's listening ports,
7507 and whether -tls-on-connect was used.
7509 44. The "port" option of the smtp transport is now expanded.
7511 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7512 silently ignored. Now an error message is written to the main and panic
7515 46. There's a new ACL modifier called "logwrite" which writes to a log file
7516 as soon as it is encountered.
7518 47. Added $local_user_uid and $local_user_gid at routing time.
7520 48. Exim crashed when trying to verify a sender address that was being
7523 49. Exim was recognizing only a space character after ".include". It now also
7524 recognizes a tab character.
7526 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7527 extracting the relevant information from the specification. The man page no
7528 longer contains scrambled data for the -d option, and I've added a section
7529 at the front about calling Exim under different names.
7531 51. Added "extra_headers" argument to the "mail" command in filter files.
7533 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7536 53. Installed eximstats 1.29.
7538 54. Added transport_filter_timeout as a generic transport option.
7540 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7541 Cc: header lines. This was required by RFC 822, but it not required by RFC
7544 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7545 incoming messages that did not have them. Now it does so only if the
7546 message originates locally, that is, if there is no associated remote host
7547 address. When Resent- header lines are present, this applies to the Resent-
7548 lines rather than the non-Resent- lines.
7550 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7551 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7553 58. Messages for configuration errors now include the name of the main
7554 configuration file - useful now that there may be more than one file in a
7555 list (.included file names were always shown).
7557 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7558 for those rare installations that do not start the daemon as root or run it
7559 setuid root. I've cut out the call to initgroups() if the daemon is not
7562 60. The Exim user and group can now be bound into the binary as text strings
7563 that are looked up at the start of Exim's processing.
7565 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7567 62. Added $mailstore_basename variable.
7569 63. Installed patch to sieve.c from Michael Haardt.
7571 64. When Exim failed to open the panic log after failing to open the main log,
7572 the original message it was trying to log was written to stderr and debug
7573 output, but if they were not available (the usual case in production), it
7574 was lost. Now it is written to syslog before the two lines that record the
7575 failures to open the logs.
7577 65. Users' Exim filters run in subprocesses under the user's uid. It is
7578 possible for a "deliver" command or an alias in a "personal" command to
7579 provoke an address rewrite. If logging of address rewriting is configured,
7580 this fails because the process is not running as root or exim. There may be
7581 a better way of dealing with this, but for the moment (because 4.30 needs
7582 to be released), I have disabled address rewrite logging when running a
7583 filter in a non-root, non-exim process.
7589 1. The buildconfig auxiliary program wasn't quoting the value set for
7590 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7591 not defined. This bug was masked in 4.22 by the effect that was fixed in
7594 2. Some messages that were rejected after a message id was allocated were
7595 shown as "incomplete" by exigrep. It no longer does this for messages that
7596 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7598 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7599 have allow_domain_literals set, the ID did not get logged in the <= line.
7600 Domain literals are now always recognized in Message-ID: header lines.
7602 4. The first argument for a ${extract expansion item is the key name or field
7603 number. Leading and trailing spaces in this item were not being ignored,
7604 causing some misleading effects.
7606 5. When deliver_drop_privilege was set, single queue runner processes started
7607 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7608 same command in the process it spins off) were not dropping privilege.
7610 6. When the daemon running as "exim" started a queue runner, it always
7611 re-executed Exim in the spun-off process. This is a waste of effort when
7612 deliver_drop_privilege is set. The new process now just calls the
7613 queue-runner function directly.
7619 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7622 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7623 ignored. Though the use of -oP was forcing the writing of a pid file, it
7624 was always written to the default place.
7626 3. If the message "no IP address found for host xxxx" is generated during
7627 incoming verification, it is now followed by identification of the incoming
7628 connection (so you can more easily find what provoked it).
7630 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7632 5. Added some features to "harden" Exim a bit more against certain attacks:
7634 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7635 be put in Local/Makefile. This is like the never_users runtime option,
7636 but it cannot be overridden. The default setting is "root".
7638 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7639 prefix string with which any file named in a -C command line option
7642 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7643 is retained for -C and -D only if the caller of Exim is root. Without
7644 it, the exim user may also use -C and -D and retain privilege.
7646 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7647 command line option is disabled.
7649 6. Macro names set by the -D option must start with an upper case letter, just
7650 like macro names defined in the configuration file.
7652 7. Added "dereference=" facility to LDAP.
7654 8. Two instances of the typo "uknown" in the source files are fixed.
7656 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7657 the Configure-Makefile script screwed up while processing it.
7659 10. Incorporated PCRE 4.4.
7661 11. The SMTP synchronization check was not operating right at the start of an
7662 SMTP session. For example, it could not catch a HELO sent before the client
7663 waited for the greeting. There is now a check for outstanding input at the
7664 point when the greeting is written. Because of the duplex, asynchronous
7665 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7666 way, but not yet received, when the check is performed.
7668 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7669 on TCP/IP sockets, because this apparently causes some broken clients to
7672 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7673 unchanged) from the Cygwin maintainer.
7675 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7676 was supported instead of testing for mbx. Effectively a typo.
7678 15. The spa authenticator server code was not checking that the input it
7679 received was valid base64.
7681 16. The debug output line for the "set" modifier in ACLs was not showing the
7682 name of the variable that was being set.
7684 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7686 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7687 lookup on its own. Something else was needed to trigger the lookup. For
7688 example, a match in host_lookup or the need for a host name in a host list.
7689 Now, if $sender_host_name is referenced and the host name has not yet been
7690 looked up, a lookup is performed. If the lookup fails, the variable remains
7691 empty, and $host_lookup_failed is set to "1".
7693 19. Added "eqi" as a case-independent comparison operator.
7695 20. The saslauthd authentication condition could segfault if neither service
7696 nor realm was specified.
7698 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7699 error message that was logged was misleading, and incoming SMTP
7700 connections were dropped. The message is now more accurate, and temporary
7701 errors are given to SMTP connections.
7703 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7704 (except RSET) with a 421 error, until QUIT is received. However, it was
7705 failing to send a response to QUIT.
7707 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7708 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7709 ACL is now run after the helo_try_verify_hosts code.
7711 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7712 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7713 case-independent, so other case variants are also recognized). Apparently
7714 some systems use these upper case variants.
7716 25. If more than two messages were waiting for the same host, and a transport
7717 filter was specified for the transport, Exim sent two messages over the
7718 same TCP/IP connection, and then failed with "socket operation on non-
7719 socket" when it tried to send the third.
7721 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7723 27. The extern definition of crypt16() in expand.c was not being excluded when
7724 the OS had its own crypt16() function.
7726 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7727 as a preferred synonym for return_size_limit, both as an option and as an
7730 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7732 30. Changed the default configuration ACL to relax the local part checking rule
7733 for addresses that are not in any local domains. For these addresses,
7734 slashes and pipe symbols are allowed within local parts, but the sequence
7735 /../ is explicitly forbidden.
7737 31. SPA server authentication was not clearing the challenge buffer before
7740 32. log_message in a "warn" ACL statement was writing to the reject log as
7741 well as to the main log, which contradicts the documentation and doesn't
7742 seem right (because no rejection is happening). So I have stopped it.
7744 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7745 However, I am unable to do any testing of this.
7747 34. Fixed an infelicity in the appendfile transport. When checking directories
7748 for a mailbox, to see if any needed to be created, it was accidentally
7749 using path names with one or more superfluous leading slashes; tracing
7750 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7752 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7753 contents are added to the log line that is written for every discarded
7754 recipient. (Previously a log_message setting was ignored.)
7756 36. The ${quote: operator now quotes the string if it is empty.
7758 37. The install script runs exim in order to find its version number. If for
7759 some reason other than non-existence or emptiness, which it checks, it
7760 could not run './exim', it was installing it with an empty version number,
7761 i.e. as "exim-". This error state is now caught, and the installation is
7764 38. An argument was missing from the function that creates an error message
7765 when Exim fails to connect to the socket for saslauthd authentication.
7766 This could cause Exim to crash, or give a corrupted message.
7768 39. Added isip, isip4, and isip6 to ${if conditions.
7770 40. The ACL variables $acl_xx are now saved with the message, and can be
7771 accessed later in routers, transports, and filters.
7773 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7774 strings in the file are not string-expanded.
7776 42. If a MAIL command specified a SIZE value that was too large to fit into an
7777 int variable, the check against message_size_limit failed. Such values are
7778 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7779 day this will have to be increased, but I don't think I want to be around
7780 when emails are that large.
7787 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7788 iconv() is not standard in FreeBSD.
7790 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7791 IPv6 enabled. The observed symptom was a segmentation fault on return from
7792 the function os_common_find_running_interfaces() in src/os.c.
7794 3. In the check_special_case() function in daemon.c I had used "errno" as an
7795 argument name, which causes warnings on some systems. This was basically a
7796 typo, since it was named "eno" in the comments!
7798 4. The code that waits for the clock to tick (at a resolution of some fraction
7799 of a second) so as to ensure message-id uniqueness was always waiting for
7800 at least one whole tick, when it could have waited for less. [This is
7801 almost certainly not relevant at current processor speeds, where it is
7802 unlikely to ever wait at all. But we try to future-proof.]
7804 5. The function that sleeps for a time interval that includes fractions of a
7805 second contained a race. It did not block SIGALRM between setting the
7806 timer, and suspending (a couple of lines later). If the interval was short
7807 and the sigsuspend() was delayed until after it had expired, the suspension
7808 never ended. On busy systems this could lead to processes getting stuck for
7811 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7812 process, before it forks any delivery processes. The open lookup caching
7813 mechanism meant that the open file or database connection was passed into
7814 the delivery process. The problem was that delivery processes always tidy
7815 up cached lookup data. This could cause a problem for the next delivery
7816 process started by the queue runner, because the external queue runner
7817 process does not know about the closure. So the next delivery process
7818 still has data in the lookup cache. In the case of a file lookup, there was
7819 no problem because closing a file descriptor in a subprocess doesn't affect
7820 the parent. However, if the lookup was caching a connection to a database,
7821 the connection was closed, and the second delivery process was likely to
7822 see errors such as "PGSQL: query failed: server closed the connection
7823 unexpectedly". The problem has been fixed by closing all cached lookups
7824 in a queue runner before running a delivery process.
7826 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7827 seem to have the "const" qualifier which it has on other OS. I've
7830 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7831 *of the same type* (client or server) with the same public name that an
7832 error should be diagnosed.
7834 9. When Exim looked up a host name for an IP address, but failed to find the
7835 original IP address when looking up the host name (a safety check), it
7836 output the message "<ip address> does not match any IP for NULL", which was
7837 confusing, to say the least. The bug was that the host name should have
7838 appeared instead of "NULL".
7840 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7841 user that is built into the binary, and the -C or -D options is used, root
7842 privilege is dropped before the configuration file is read. In addition,
7843 logging is switched to stderr instead of the normal log files. If the
7844 configuration then re-defines the Exim user, the unprivileged environment
7845 is probably not what is expected, so Exim logs a panic warning message (but
7848 However, if deliver_drop_privilege is set, the unprivileged state may well
7849 be exactly what is intended, so the warning has been cut out in that case,
7850 and Exim is allowed to try to write to its normal log files.
7856 1. smtp_return_error_details was not giving details for temporary sender
7857 or receiver verification errors.
7859 2. Diagnose a configuration error if two authenticators have the same public
7862 3. Exim used not to create the message log file for a message until the first
7863 delivery attempt. This could be confusing when incoming messages were held
7864 for policy or load reasons. The message log file is now created at the time
7865 the message is received, and an initial "Received" line is written to it.
7867 4. The automatically generated man page for command line options had a minor
7868 bug that caused no ill effects; however, a more serious problem was that
7869 the procedure for building the man page automatically didn't always
7870 operate. Consequently, release 4.20 contains an out-of-date version. This
7871 shouldn't happen again.
7873 5. When building Exim with embedded Perl support, the script that builds the
7874 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7875 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7877 6. The freeze_tell option was not being used for messages that were frozen on
7878 arrival, either by an ACL or by local_scan().
7880 7. Added the smtp_incomplete_transaction log selector.
7882 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7883 was accepting AUTH without a new EHLO.
7885 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7886 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7889 10. Logging of TCP/IP connections (when configured) now happens in the main
7890 daemon process instead of the child process, so that the TCP/IP connection
7891 count is more accurate (but it can never be perfect).
7893 11. The use of "drop" in a nested ACL was not being handled correctly in the
7894 outer ACL. Now, if condition failure induced by the nested "drop" causes
7895 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7896 or "require"), the connection is dropped.
7898 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7899 that yield "discard" can now be used with an "accept" or a "discard" verb,
7900 but an error is generated for any others (because I can't see a useful way
7901 to define what should happen).
7903 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7904 are now processed in the same way as lines in the Exim configuration file.
7905 In particular, continuation lines are supported.
7907 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7909 15. Added -ti meaning -t -i.
7911 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7912 domains, and warn by logging if others are found.
7914 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7915 returned from GIFCONF when Exim is trying to find the list of interfaces on
7916 a host. The code in os.c has been modified to copy each ifreq to an aligned
7917 structure in all cases.
7919 Also, in some cases, the returned ifreq's were being copied to a 'struct
7920 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7921 means the last couple of bytes of an IPv6 address could be chopped if the
7922 ifreq contained only a normal sockaddr (14 bytes storage).
7924 18. Named domain lists were not supported in the hosts_treat_as_local option.
7925 An entry such as +xxxx was not recognized, and was treated as a literal
7928 19. Ensure that header lines added by a DATA ACL are included in the reject log
7929 if the ACL subsequently rejects the message.
7931 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7932 MD5 (which is deprecated).
7934 21. When testing a filter file using -bf, Exim was writing a message when it
7935 took the sender from a "From " line in the message, but it was not doing so
7936 when it took $return_path from a Return-Path: header line. It now does.
7938 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7939 with a valid header line field name (a series of printing characters
7940 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7942 23. Changed "disc" in the source to "disk" to conform to the documentation and
7943 the book and for uniformity.
7945 24. Ignore Sendmail's -Ooption=value command line item.
7947 25. When execve() failed while trying to run a command in a pipe transport,
7948 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7949 could be confused with a return value of 69 from the command itself. This
7950 has been changed to 127, the value the shell returns if it is asked to run
7951 a non-existent command. The wording for the related log line suggests a
7952 non-existent command as the problem.
7954 26. If received_header_text expands to an empty string, do not add a Received:
7955 header line to the message. (Well, it adds a token one on the spool, but
7956 marks it "old" so that it doesn't get used or transmitted.)
7958 27. Installed eximstats 1.28 (addition of -nt option).
7960 28. There was no check for failure on the call to getsockname() in the daemon
7961 code. This can fail if there is a shortage of resources on the system, with
7962 ENOMEM, for example. A temporary error is now given on failure.
7964 29. Contrary to the C standard, it seems that in some environments, the
7965 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7966 program. Exim now does this explicitly; it affects the formatting of
7967 timestamps using strftime().
7969 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7970 complaints. I've now initialized all the variables, to avoid this.
7972 32. Header lines added by a system filter were not being "seen" during
7973 transport-time rewrites.
7975 33. The info_callback() function passed to OpenSSL is set up with type void
7976 (*)(SSL *, int, int), as described somewhere. However, when calling the
7977 function (actually a macro) that sets it up, the type void(*)() is
7978 expected. I've put in a cast to prevent warnings from picky compilers.
7980 34. If a DNS black list lookup found a CNAME record, but there were no A
7981 records associated with the domain it pointed at, Exim crashed.
7983 35. If a DNS black list lookup returned more than one A record, Exim ignored
7984 all but the first. It now scans all returned addresses if a particular IP
7985 value is being sought. In this situation, the contents of the
7986 $dnslist_value variable are a list of all the addresses, separated by a
7989 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7990 to accept a host name and all its aliases if the forward lookup for any of
7991 them yielded the IP address of the incoming connection. Now it accepts only
7992 those names whose forward lookup yields the correct IP address. Any other
7993 names are discarded. This closes a loophole whereby a rogue DNS
7994 administrator could create reverse DNS records to break through a
7995 wildcarded host restriction in an ACL.
7997 37. If a user filter or a system filter that ran in a subprocess used any of
7998 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7999 the wrong values were passed to the pipe command ($thisaddress had the
8000 value of $0, $0 had the value of $1, etc). This bug was introduced by
8001 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8003 38. Improved the line breaking for long SMTP error messages from ACLs.
8004 Previously, if there was no break point between 40 and 75 characters, Exim
8005 left the rest of the message alone. Two changes have been made: (a) I've
8006 reduced the minimum length to 35 characters; (b) if it can't find a break
8007 point between 35 and 75 characters, it looks ahead and uses the first one
8008 that it finds. This may give the occasional overlong line, but at least the
8009 remaining text gets split now.
8011 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8012 file descriptors might be low, and that setting 1000 would always raise it.
8013 It turns out that in some environments, the limit is already over 1000 and
8014 that lowering it causes trouble. So now Exim takes care not to decrease it.
8016 40. When delivering a message, the value of $return_path is set to $sender_
8017 address at the start of routing (routers may change the value). By an
8018 oversight, this default was not being set up when an address was tested by
8019 -bt or -bv, which affected the outcome if any router or filter referred to
8022 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8023 log only when "message" or "log_message" are set. However, if one of the
8024 conditions was an address verification, or a call to a nested ACL, the
8025 messages generated by the underlying test were being passed through. This
8026 no longer happens. The underlying message is available in $acl_verify_
8027 message for both "message" and "log_message" expansions, so it can be
8028 passed through if needed.
8030 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8031 new expansion $bh_ to give the encoded byte string without charset
8032 translation. Translation happens only if iconv() is available; HAVE_ICONV
8033 indicates this at build time. HEADERS_CHARSET gives the charset to
8034 translate to; headers_charset can change it in the configuration, and
8035 "headers charset" can change it in an individual filter file.
8037 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8038 that creates RFC 2047 encoded "words" labels them as that charset instead
8039 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8040 expansion operator; (ii) when Exim creates a From: line for a local
8041 message; (iii) when a header line is rewritten to include a "phrase" part.
8043 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8044 buggy, causing it to skip the first lines of messages whose message ID
8045 ended in 'D'. This would not have bitten before Exim release 4.14, because
8046 message IDs were unlikely to end in 'D' before then. The effect was to have
8047 incorrect size information for certain domains.
8049 45. #include "config.h" was missing at the start of the crypt16.c module. This
8050 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8053 46. If there was a timeout during a "random" callout check, Exim treated it as
8054 a failure of the random address, and carried on sending RSET and the real
8055 address. If the delay was just some slowness somewhere, the response to the
8056 original RCPT would be taken as a response to RSET and so on, causing
8057 mayhem of various kinds.
8059 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8060 when I implemented it. It didn't allow for the fact that some option values
8061 may legitimately be negative (e.g. size_addition), and it didn't even do
8062 the right test for positive values.
8064 48. Domain names in DNS records are case-independent. Exim always looks them up
8065 in lower case. Some resolvers return domain names in exactly the case they
8066 appear in the zone file, that is, they may contain uppercase letters. Not
8067 all resolvers do this - some return always lower case. Exim was treating a
8068 change of case by a resolver as a change of domain, similar to a widening
8069 of a domain abbreviation. This triggered its re-routing code and so it was
8070 trying to route what was effectively the same domain again. This normally
8071 caused routing to fail (because the router wouldn't handle the domain
8072 twice). Now Exim checks for this case specially, and just changes the
8073 casing of the domain that it ultimately uses when it transmits the message
8076 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8079 50. If a filter generated a file delivery with a non-absolute name (possible if
8080 no home directory exists for the router), the forbid_file option was not
8083 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8084 the existing equality matching.
8086 52. Exim was using ints instead of ino_t variables in some places where it was
8087 dealing with inode numbers.
8089 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8090 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8091 called TMPDIR, and if it finds it is different, it changes its value.
8093 54. The smtp_printf() function is now made available to local_scan() so
8094 additional output lines can be written before returning. There is also an
8095 smtp_fflush() function to enable the detection of a dropped connection.
8096 The variables smtp_input and smtp_batched_input are exported to
8099 55. Changed the default runtime configuration: the message "Unknown user"
8100 has been removed from the ACL, and instead placed on the localuser router,
8101 using the cannot_route_message feature. This means that any verification
8102 failures that generate their own messages won't get overridden. Similarly,
8103 the "Unrouteable address" message that was in the ACL for unverifiable
8104 relay addresses has also been removed.
8106 56. Added hosts_avoid_esmtp to the smtp transport.
8108 57. The exicyclog script was not checking for the esoteric option
8109 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8110 will work only if exicyclog is run under the appropriate euid.
8112 58. Following a discussion on the list, the rules by which Exim recognises line
8113 endings on incoming messages have been changed. The -dropcr and drop_cr
8114 options are now no-ops, retained only for backwards compatibility. The
8115 following line terminators are recognized: LF CRLF CR. However, special
8116 processing applies to CR:
8118 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8119 nor a local message in the state where . is a terminator.
8121 (ii) If a bare CR is encountered in a header line, an extra space is added
8122 after the line terminator so as not to end the header. The reasoning
8123 behind this is that bare CRs in header lines are most likely either
8124 to be mistakes, or people trying to play silly games.
8126 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8127 was being incorrectly given as 18 bytes larger than it should have been.
8128 This is a VOB (very old bug).
8130 60. This may never have affected anything current, but just in case it has:
8131 When the local host is found other than at the start of a list of hosts,
8132 the local host, those with the same MX, and any that follow, are discarded.
8133 When the list in question was part of a longer list of hosts, the following
8134 hosts (not currently being processed) were also being discarded. This no
8135 longer happens. I'm not sure if this situation could ever has previously
8138 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8141 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8142 header. This is something that is recommended in a new Internet Draft, and
8143 is something that is documented as being done by Sendmail. There are two
8144 possible values. For messages generated by the autoreply transport, Exim
8147 Auto-Submitted: auto-replied
8149 whereas for all other generated messages (e.g. bounces) it adds
8151 Auto-Submitted: auto-generated
8153 63. The "personal" condition in filters now includes a test for the
8154 Auto-Submitted: header. If it contains the string "auto-" the message it
8155 not considered personal.
8157 64. Added rcpt_include_affixes as a generic transport option.
8159 65. Added queue_only_override (default true).
8161 66. Added the syslog_duplication option.
8163 67. If what should have been the first header line of a message consisted of
8164 a space followed by a colon, Exim was mis-interpreting it as a header line.
8165 It isn't of course - it is syntactically invalid and should therefore be
8166 treated as the start of the message body. The misbehaviour could have
8167 caused a number of strange effects, including loss of data in subsequent
8168 header lines, and spool format errors.
8170 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8171 client host had authenticated. This control can now be exercised by an ACL
8172 for more flexibility.
8174 69. By default, callouts do not happen when testing with -bh. There is now a
8175 variant, -bhc, which does actually run the callout code, including
8176 consulting and updating the callout cache.
8178 70. Added support for saslauthd authentication, courtesy of Alexander
8181 71. If statvfs() failed on the spool or log directories while checking their
8182 size for availability, Exim confusingly gave the error "space shortage".
8183 Furthermore, in debugging mode it crashed with a floating point exception.
8184 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8185 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8186 serious problem, Exim now writes to the main and panic logs when this
8187 happens, with details of the failure. It then refuses to accept the
8188 incoming message, giving the message "spool directory problem" or "log
8189 directory problem" with a 421 code for SMTP messages.
8191 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8192 0, 1, and 2 exist, because some OS complain for execs without them (see
8193 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8194 descriptors. However, the code omitted to check that the open succeeded,
8195 causing mysterious errors if for some reason the permissions on /dev/null
8196 got screwed. Now Exim writes a message to the main and panic logs, and
8197 bombs out if it can't open /dev/null.
8199 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8200 interact so that it is all more flexible. It is supposed to remain
8201 backwards compatible. Also added extra_local_interfaces.
8203 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8204 to bomb out with an assertion failure - to the client this appears as a
8205 connection drop. This problem occurs in the part of the code that was taken
8206 from the Samba project. Fortunately, the assertion is in a very simple
8207 function, so I have fixed this by reproducing the function inline in the
8208 one place where it is called, and arranging for authentication to fail
8209 instead of killing the process with assert().
8211 75. The SPA client code was not working when the server requested OEM rather
8212 than Unicode encoding.
8214 76. Added code to make require_files with a specific uid setting more usable in
8215 the case where statting the file as root fails - usually a non-root-mounted
8216 NFS file system. When this happens and the failure is EACCES, Exim now
8217 forks a subprocess and does the per-uid checking as the relevant uid.
8219 77. Added process_log_path.
8221 78. If log_file_path was not explicitly set, a setting of check_log_space or
8222 check_log_inodes was ignored.
8224 79. If a space check for the spool or log partitions fails, the incident is now
8225 logged. Of course, in the latter case the data may get lost...
8227 80. Added the %p formatting code to string_format() so that it can be used to
8228 print addresses in debug_print(). Adjusted all the address printing in the
8229 debugging in store.c to use %p rather than %d.
8231 81. There was a concern that a line of code in smtp_in.c could overflow a
8232 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8233 initially expressed, the concern was not well-founded, because trailing
8234 spaces are removed early. However, if the trailing spaces were followed by
8235 a NULL, they did not get removed, so the overflow was possible. Two fixes
8238 (a) I re-wrote the offending code in a cleaner fashion.
8239 (b) If an incoming SMTP command contains a NULL character, it is rejected
8242 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8243 runs initgroups(), so that if the Exim user is in any additional groups,
8244 they will be used during message reception.
8250 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob