Test suite tidies.
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
e49c7bb4 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.332 2006/03/16 14:00:50 ph10 Exp $
495ae4b0
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2
3Change log file for Exim from version 4.21
4-------------------------------------------
5
214e2000
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6Exim version 4.61
7-----------------
8
9PH/01 The code for finding all the local interface addresses on a FreeBSD
10 system running IPv6 was broken. This may well have applied to all BSD
11 systems, as well as to others that have similar system calls. The broken
12 code found IPv4 interfaces correctly, but gave incorrect values for the
13 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
14 that it would not match correctly against @[] and not recognize the IPv6
15 addresses as local.
16
f9daeae0
PH
17PH/02 The ipliteral router was not recognizing addresses of the form user@
18 [ipv6:....] because it didn't know about the "ipv6:" prefix.
19
7e66e54d
PH
20PH/03 Added disable_ipv6.
21
c8ea1597
PH
22PH/04 Changed $reply_address to use the raw form of the headers instead of the
23 decoded form, because it is most often used to construct To: headers
24 lines in autoreplies, and the decoded form may well be syntactically
25 invalid. However, $reply_address has leading white space removed, and all
26 newlines turned into spaces so that the autoreply transport does not
27 grumble.
28
911f6fde
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29PH/05 If group was specified without a user on a router, and no group or user
30 was specified on a transport, the group from the router was ignored.
31
47ca6d6c
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32PH/06 Increased the number of ACL variables to 20 of each type, and arranged
33 for visible compile-time settings that can be used to change these
34 numbers, for those that want even more. Backwards compatibility with old
35 spool files has been maintained. However, going back to a previous Exim
36 release will lost any variables that are in spool files.
37
ed0e9820
PH
38PH/07 Two small changes when running in the test harness: increase delay when
39 passing a TCP/IP connection to a new process, in case the original
40 process has to generate a bounce, and remove special handling of
41 127.0.0.2 (sic), which is no longer necessary.
42
eff37e47
PH
43PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
44 be the same on different OS.
45
1921d2ea
PH
46PH/09 Moved a debug statement in filter processing to avoid a race problem when
47 testing.
48
b3f69ca8
JJ
49JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
50 whether --show-vars was specified or not
51
52JJ/02 exipick: Added support for new ACL variable spool format introduced
53 in 4.61-PH/06
54
424a1c63
PH
55PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
56 syntactically invalid From: or Reply-to: line, and a filter used this to
57 generate an autoreply, and therefore failed to obtain an address for the
58 autoreply, Exim could try to deliver to a non-existent relative file
59 name, causing unrelated and misleading errors. What now happens is that
60 it logs this as a hard delivery error, but does not attempt to create a
61 bounce message.
62
7a100415
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63PH/11 The exinext utility has a -C option for testing purposes, but although
64 the given file was scanned by exinext itself; it wasn't being passed on
65 when Exim was called.
66
19b9dc85
PH
67PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
68 an end-of-file indication when reading a command response.
69
309bd837
PH
70PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
71 compiled. In many other places in Exim, IPv6 addresses are always
72 recognized, so I have changed this. It also means that IPv4 domain
73 literals of the form [IPV4:n.n.n.n] are now always recognized.
74
59e82a2a
PH
75PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
76 used if the router is not running as root, for example, when verifying at
77 ACL time, or when using -bh. The debugging output from this situation was
78 non-existent - all you got was a failure to exec. I have made two
79 changes:
80
81 (a) Failures to set uid/gid, the current directory, or a process leader
82 in a subprocess such as that created by queryprogram now generate
83 suitable debugging ouput when -d is set.
84
85 (b) The queryprogram router detects when it is not running as root,
86 outputs suitable debugging information if -d is set, and then runs
87 the subprocess without attempting to change uid/gid.
88
9edc04ce
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89PH/15 Minor change to Makefile for building test_host (undocumented testing
90 feature).
91
1349e1e5
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92PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
93 additional section of a DNS packet that returns MX or SRV records.
94 Instead, it always explicitly searches for A/AAAA records. This avoids
95 major problems that occur when a DNS server includes only records of one
96 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
97 fixed another bug: if SRV records were looked up and the corresponding
98 address records were *not* found in the additional section, the port
99 values from the SRV records were lost.
100
ea49d0e1
PH
101PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
102 using the correct key (the original address) when searching the retry
103 rules in order to find which one to use for generating the retry hint.
104
064a94c9
PH
105PH/18 If quota_warn_message contains a From: header, Exim now refrains from
106 adding the default one. Similarly, if it contains a Reply-To: header, the
107 errors_reply_to option, if set, is not used.
108
727071f8
PH
109PH/19 When calculating a retry time, Exim used to measure the "time since
110 failure" by looking at the "first failed" field in the retry record. Now
111 it does not use this if it is later than than the arrival time of the
112 message. Instead it uses the arrival time. This makes for better
113 behaviour in cases where some deliveries succeed, thus re-setting the
114 "first failed" field. An example is a quota failure for a huge message
115 when small messages continue to be delivered. Without this change, the
116 "time since failure" will always be short, possible causing more frequent
117 delivery attempts for the huge message than are intended.
118
f78eb7c6
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119PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
120 $1, $2, $3) because the numerical variables can be reset during some
121 expansion items (e.g. "match"), thereby losing the authentication data.
122
21c28500
PH
123PH/21 Make -bV show the size of off_t variables so that the test suite can
124 decide whether to run tests for quotas > 2G.
125
126PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
127 mailbox_size, and mailbox_filecount in the appendfile transport. If a
128 filecount value is greater than 2G or if a quota value is greater than 2G
129 on a system where the size of off_t is not greater than 4, a panic error
130 is given.
131
1688f43b
PH
132PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
133 never match. The debug and -bh output now contains an explicit error
134 message indicating a malformed IPv4 address or mask.
135
136PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
137 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
138 PH/23 above applies.
139
9675b384
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140PH/25 Do not write to syslog when running in the test harness. The only
141 occasion when this arises is a failure to open the main or panic logs
142 (for which there is an explicit test).
143
6a3f1455
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144PH/26 Added the /no_tell option to "control=freeze".
145
dac79d3e
PH
146PH/27 If a host name lookup failed very early in a connection, for example, if
147 the IP address matched host_lookup and the reverse lookup yielded a name
148 that did not have a forward lookup, an error message of the form "no IP
149 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
150 could be logged. Now it outputs the IP address instead of "NULL".
1349e1e5 151
5977a0b3
PH
152PH/28 An enabling patch from MH: add new function child_open_exim2() which
153 allows the sender and the authenticated sender to be set when
154 submitting a message from within Exim. Since child_open_exim() is
155 documented for local_scan(), the new function should be too.
156
c91535f3
PH
157PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
158 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
159 results in an empty string is now treated as unset.
160
0d46a8c8
PH
161PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
162
278c6e6c
PH
163PH/31 Added sender_verify_fail logging option.
164
2cbb4081
PH
165PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
166 needed by RFC 822 but not by RFC 2822 was commented out. I have now
167 tidied the source and removed it altogether.
168
3eef829e
PH
169PH/33 When a queue run was abandoned because the load average was too high, a
170 log line was always written; now it is written only if the queue_run log
171 selector is set. In addition, the log line for abandonment now contains
172 information about the queue run such as the pid. This is always present
173 in "start" and "stop" lines but was omitted from the "abandon" line.
174
1ab95fa6
PH
175PH/34 Omit spaces between a header name and the colon in the error message that
176 is given when verify = headers_syntax fails (if there are lots of them,
177 the message gets confusing).
178
230205fc
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179PH/35 Change the default for dns_check_names_pattern to allow slashes within
180 names, as there are now some PTR records that contain slashes. This check
181 is only to protect against broken name servers that fall over on strange
182 characters, so the fact that it applies to all lookups doesn't matter.
183
75e0e026
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184PH/36 Now that the new test suite is complete, we can remove some of the
185 special code in Exim that was needed for the old test suite. For example,
186 sorting DNS records because real resolvers return them in an arbitrary
187 order. The new test suite's fake resolver always returns records in the
188 same order.
189
190PH/37 When running in the test harness, use -odi for submitted messages (e.g.
191 bounces) except when queue_only is set, to avoid logging races between
192 the different processes.
193
145396a6
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194PH/38 Panic-die if .include specifies a non-absolute path.
195
3cd34f13
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196PH/39 A tweak to the "H" retry rule from its user.
197
11121d3d
JJ
198JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
199 a label. They prevented compilation on older perls.
200
201JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
202 a warning to be raised on newish perls.
203
204JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
205 on queue. Changes to match documented behaviour of showing count of
206 messages matching specified criteria.
207
8def5aaf
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208PH/40 Changed the default ident timeout from 30s to 5s.
209
929ba01c
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210PH/41 Added support for the use of login_cap features, on those BSD systems
211 that have them, for controlling the resources used by pipe deliveries.
212
2632889e
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213PH/42 The content-scanning code uses fopen() to create files in which to put
214 message data. Previously it was not paying any attention to the mode of
215 the files. Exim runs with umask(0) because the rest of the code creates
216 files with open(), and sets the required mode explicitly. Thus, these
217 files were ending up world-writeable. This was not a big issue, because,
218 being within the spool directory, they were not world-accessible. I have
219 created a function called modefopen, which takes an additional mode
220 argument. It sets umask(777), creates the file, chmods it to the required
221 mode, then resets the umask. All the relevant calls to fopen() in the
222 content scanning code have been changed to use this function.
223
944a9c55
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224PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
225 to 24 hours. This avoids potential overflow problems when processing G
226 and H retry rules. I suspect nobody ever tinkers with this value.
227
4a23603b
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228PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
229
4730f942
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230PH/45 When the plaintext authenticator is running as a client, the server's
231 challenges are checked to ensure they are valid base64 strings. By
232 default, the authentication attempt is cancelled if an invalid string is
233 received. Setting client_ignore_invalid_base64 true ignores these errors.
234 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
235 they are received. Thus, the responses can be made to depend on the
236 challenges. If an invalid string is ignored, an empty string is placed in
237 the variable.
238
30dba1e6
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239PH/46 Messages that are created by the autoreply transport now contains a
240 References: header, in accordance with RFCs 2822 and 3834.
241
382afc6b
PH
242PH/47 Added authenticated_sender_force to the smtp transport.
243
a86229cf
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244PH/48 The ${prvs expansion was broken on systems where time_t was long long.
245
50c99ba6
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246PH/49 Installed latest patch from the Sieve maintainer.
247
d35e429d
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248PH/50 When an Exim quota was set without a file count quota, and mailbox_size
249 was also set, the appendfile transport was unnecessarily scanning a
250 directory of message files (e.g. for maildir delivery) to find the count
251 of files (along with the size), even though it did not need this
252 information. It now does the scan only if it needs to find either the
253 size of the count of files.
254
f90d018c
PH
255PH/51 Added ${time_eval: to convert Exim time strings into seconds.
256
75def545
PH
257PH/52 Two bugs concerned with error handling when the smtp transport is
258 used in LMTP mode:
259
260 (i) Exim was not creating retry information for temporary errors given
261 for individual recipients after the DATA command when the smtp transport
262 was used in LMTP mode. This meant that they could be retried too
263 frequently, and not timed out correctly.
264
265 (ii) Exim was setting the flag that allows error details to be returned
266 for LMTP errors on RCPT commands, but not for LMTP errors for individual
267 recipients that were returned after the DATA command.
268
269PH/53 This is related to PH/52, but is more general: for any failing address,
270 when detailed error information was permitted to be returned to the
271 sender, but the error was temporary, then after the final timeout, only
272 "retry timeout exceeded" was returned. Now it returns the full error as
273 well as "retry timeout exceeded".
274
c46782ef
PH
275PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
276 do this, and (what is worse) MTAs that accept it.
277
71fafd95
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278PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
279 will now be deprecated.
280
2c5db4fd
PH
281PH/56 New os.c-cygwin from the Cygwin maintainer.
282
9cf6b11a
JJ
283JJ/06 exipick: added --unsorted option to allow unsorted output in all output
284 formats (previously only available in exim formats via -bpr, -bpru,
285 and -bpra. Now also available in native and exiqgrep formats)
286
287JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
288 with very large, slow to parse queues
289
290JJ/08 exipick: added ! as generic prefix to negate any criteria format
291
292JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
293
898d150f
PH
294PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
295 responses to authentication challenges, though it was showing the
296 challenges; (ii) I've removed the CR characters from the debug output for
297 SMTP output lines.
298
46218253
PH
299PH/58 Allow for the insertion of a newline as well as a space when a string
300 is turned into more than one encoded-word during RFC 2047 encoding. The
301 Sieve code now uses this.
302
e97957bc
PH
303PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
304 data_4xx, lost_connection, tls_required.
305
81e509d7
PH
306PH/60 When a VRFY deferred or FAILED, the log message rather than the user
307 message was being sent as an SMTP response.
308
3d240ff7
PH
309PH/61 Add -l and -k options to exicyclog.
310
b37c4101
PH
311PH/62 When verifying, if an address was redirected to one new address, so that
312 verification continued, and the new address failed or deferred after
313 having set something in $address_data, the value of $address_data was not
314 passed back to the ACL. This was different to the case when no
315 redirection occurred. The value is now passed back in both cases.
316
79378e0f
PH
317PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
318 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
319 use login_cap.h, so on its own it isn't the distinguishing feature. The
320 new name refers directly to the setclassresources() function.
321
e49c7bb4
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322PH/65 Added configuration files for NetBSD3.
323
214e2000 324
5de37277
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325Exim version 4.60
326-----------------
327
cc38ddbf
PH
328PH/01 Two changes to the default runtime configuration:
329
330 (1) Move the checks for relay_from_hosts and authenticated clients from
331 after to before the (commented out) DNS black list checks.
332
333 (2) Add control=submission to the relay_from_hosts and authenticated
334 clients checks, on the grounds that messages accepted by these
335 statements are most likely to be submissions.
5de37277 336
72fdd6ae
PH
337PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
338
339 (1) Generate an error if the third argument for the ${prvs expansion is
340 not a single digit.
341
342 (2) Treat a missing third argument of ${prvscheck as if it were an empty
343 string.
344
345 (3) Reset the variables that are obtained from the first argument of
346 ${prvscheck and used in the second argument before leaving the code,
347 because their memory is reclaimed, so using them afterwards may do
348 silly things.
349
350 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
351 one (it's much easier than Tom thought :-).
352
353 (5) Because of (4), we can now allow for the use of $prvscheck_result
354 inside the third argument.
cb9328de 355
cb741023
PH
356PH/03 For some reason, the default setting of PATH when running a command from
357 a pipe transport was just "/usr/bin". I have changed it to
358 "/bin:/usr/bin".
359
f174f16e
PH
360PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
361 anything to be listed in the output from -bV.
b2f5a032 362
c25242d7
PH
363PH/05 When a filter generated an autoreply, the entire To: header line was
364 quoted in the delivery log line, like this:
365
366 => >A.N.Other <ano@some.domain> <original@ddress> ...
367
368 This has been changed so that it extracts the operative address. There
369 may be more than one such address. If so, they are comma-separated, like
370 this:
371
372 => >ano@some.domain,ona@other.domain <original@ddress> ...
373
82c19f95
PH
374PH/06 When a client host used a correct literal IP address in a HELO or EHLO
375 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
376 not being looked up in the rDNS to get a host name, Exim was showing the
377 IP address twice in Received: lines, even though the IP addresses were
378 identical. For example:
379
380 Received: from [1.2.3.4] (helo=[1.2.3.4])
381
382 However, if the real host name was known, it was omitting the HELO data
383 if it matched the actual IP address. This has been tidied up so that it
384 doesn't show the same IP address twice.
385
d7ffbc12
PH
386PH/07 When both +timestamp and +memory debugging was on, the value given by
387 $tod_xxx expansions could be wrong, because the tod_stamp() function was
388 called by the debug printing, thereby overwriting the timestamp buffer.
389 Debugging no longer uses the tod_stamp() function when +timestamp is set.
390
9f526266
PH
391PH/08 When the original message was included in an autoreply transport, it
392 always said "this is a copy of the message, including all the headers",
393 even if body_only or headers_only was set. It now gives an appropriate
394 message.
395
87fcc8b9
PH
396PH/09 Applied a patch from the Sieve maintainer which:
397
398 o fixes some comments
399 o adds the (disabled) notify extension core
400 o adds some debug output for the result of if/elsif tests
401 o points to the current vacation draft in the documentation
402 and documents the missing references header update
403
404 and most important:
405
406 o fixes a bug in processing the envelope test (when testing
407 multiple envelope elements, the last element determinted the
408 result)
409
456682f5
PH
410PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
411 Electronic Mail") by including:
412
413 Auto-submitted: auto-generated
414
415 in the messages that it generates (bounce messages and others, such as
416 warnings). In the case of bounce messages for non-SMTP mesages, there was
417 also a typo: it was using "Auto_submitted" (underscore instead of
418 hyphen). Since every message generated by Exim is necessarily in response
419 to another message, thes have all been changed to:
420
421 Auto-Submitted: auto-replied
422
423 in accordance with these statements in the RFC:
424
425 The auto-replied keyword:
426
427 - SHOULD be used on messages sent in direct response to another
428 message by an automatic process,
429
430 - MUST NOT be used on manually-generated messages,
431
432 - MAY be used on Delivery Status Notifications (DSNs) and Message
433 Disposition Notifications (MDNs),
434
435 - MUST NOT be used on messages generated by automatic or periodic
436 processes, except for messages which are automatic responses to
437 other messages.
438
3e46c1aa
PH
439PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
440 to the default Received: header definition.
456682f5 441
49826d12
PH
442PH/12 Added log selector acl_warn_skipped (default on).
443
eba0c039
PH
444PH/13 After a successful wildlsearch lookup, discard the values of numeric
445 variables because (a) they are in the wrong storage pool and (b) even if
446 they were copied, it wouldn't work properly because of the caching.
447
a0d6ba8a
PH
448PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
449 checking when decoding. Apparently there are clients that generate
450 overlong encoded strings. Why am I not surprised?
451
f0917727
PH
452PH/15 If the first argument of "${if match_address" was not empty, but did not
453 contain an "@" character, Exim crashed. Now it writes a panic log message
454 and treats the condition as false.
455
096fee00
PH
456PH/16 In autoreply, treat an empty string for "once" the same as unset.
457
024bd3c2
PH
458PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
459 extension "envelope-auth". The code is finished and in agreement with
460 other implementations, but there is no documentation so far and in fact,
461 nobody wrote the draft yet. This extension is currently #undef'ed, thus
462 not changing the active code.
463
464 Print executed "if" and "elsif" statements when debugging is used. This
465 helps a great deal to understand what a filter does.
466
467 Document more things not specified clearly in RFC3028. I had all this
468 sorted out, when out of a sudden new issues came to my mind. Oops."
469
df199fec
PH
470PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
471 (Bugzilla #53).
472
d27f1df3
PH
473PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
474 canonical form (as documented). However, after a host name lookup from
475 the IP address, check_host() was doing a simple string comparison with
476 addresses acquired from the DNS when checking that the found name did
477 have the original IP as one of its addresses. Since any found IPv6
478 addresses are likely to be in abbreviated form, the comparison could
479 fail. Luckily, there already exists a function for doing the comparison
480 by converting both addresses to binary, so now that is used instead of
481 the text comparison.
482
96776534
PH
483PH/20 There was another similar case to PH/19, when a complete host name was
484 given in a host list; looking up its IP address could give an abbreviated
485 form, whereas the current host's name might or might not be abbreviated.
486 The same fix has been applied.
487
5de37277 488
9a799bc0
PH
489Exim version 4.54
490-----------------
491
492PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
493 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
494 It now does.
495
99a4b039
PH
496PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
497 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
498
499PH/03 Typo: missing ".o" in src/pcre/Makefile.
500
4b233853
PH
501PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
502 header line, restrict the check to what is listed in RFCs 2369 and 2929.
503 Also, for "Auto-Submitted", treat anything other than "no" as
504 non-personal, in accordance with RFC 3834. (Previously it treated
505 anything starting "auto-" as non-personal.)
506
8857ccfd
PH
507TF/01 The control=submission/name=... option had a problem with syntax
508 errors if the name included a slash character. The /name= option
509 now slurps the rest of the string, so it can include any characters
510 but it must come last in the list of options (after /sender_retain
511 or /domain=).
512
433a2980
PH
513PH/05 Some modifications to the interface to the fake nameserver for the new
514 testing suite.
515
3e46c1aa 516
9a799bc0 517
e3a311ba
TK
518Exim version 4.53
519-----------------
520
521TK/01 Added the "success_on_redirect" address verification option. See
522 NewStuff for rationale and an example.
523
13b685f9
PH
524PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
525
395ff96d
PH
526PH/02 Patch to exigrep to allow it to work on syslog lines.
527
5b68f6e4
PH
528PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
529 fread() to skip over the body file's header line, because in Cygwin the
530 header line is locked and is inaccessible.
531
1ab52c69
PH
532PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
533 co-exist for some time) to make it clear that it is the Exim ID that is
534 referenced, not the Message-ID: header line.
535
b07e6aa3
PH
536PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
537 string_format() function, because snprintf() does not exist on all
538 operating systems.
539
254e032f
PH
540PH/06 The use of forbid_filter_existstest now also locks out the use of the
541 ${stat: expansion item.
542
3af76a81
PH
543PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
544 protocol synchronization error", to keep the pedants happy.
545
2548ba04
PH
546PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
547 well as for IRIX systems, when gcc is being used. See the host.c source
548 file for comments.
549
b6c6011d
PH
550PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
551
cf39cf57
PH
552PH/10 Named domain lists were not working if used in a queue_smtp_domains
553 setting.
554
f1513293
PH
555PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
556 transport and to the smtp transport in LMTP mode.
557
727549a4
PH
558TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
559
af46795e
PH
560PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
561 run a filter in a subprocess. This could lead to confusion in subsequent
562 lookups in the parent process. There should also be a search_tidyup() at
563 the end of the subprocess.
564
d7b47fd0
PH
565PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
566 only if the host matched helo_try_verify_hosts, which caused the
567 verification to occur when the EHLO/HELO command was issued. The ACL just
568 tested the remembered result. Now, if a previous verification attempt has
569 not happened, "verify = helo" does it there and then.
570
ee744174
JJ
571JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
572
b582ab87
PH
573TK/03 Fix log output including CR from clamd.
574
41a13e0a
PH
575PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
576 exist provoked a memory error which could cause a segfault.
577
f625cc5a
PH
578PH/15 Installed PCRE 6.2
579
580PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
581
21f7af35
PH
582PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
583 of the problem. Specifically, suggested +O2 rather than +O1 for the
584 HP-UX compiler.
585
31480e42
PH
586PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
587
2d280592
PH
588PH/20 If a delivery was routed to a non-standard port by means of an SRV
589 record, the port was not correctly logged when the outgoing_port log
590 selector was set (it logged the transort's default port).
591
7cd1141b
PH
592PH/21 Added support for host-specific ports to manualroute, queryprogram,
593 fallback_hosts, and "hosts" in the smtp transport.
594
595PH/22 If the log selector "outgoing_port" is set, the port is now also given on
596 host errors such as "Connection refused".
597
750af86e
PH
598PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
599 authentication with radiusclient 0.4.9:
600
601 - Error returned from rc_read_config was caught wrongly
602 - Username/password not passed on to radius server due to wrong length.
603
604 The presumption is that some radiusclient API changes for 4.51/PH/17
605 were not taken care of correctly. The code is still untested by me (my
606 Linux distribution still has 0.3.2 of radiusclient), but it was
607 contributed by a Radius user.
608
609PH/24 When doing a callout, the value of $domain wasn't set correctly when
610 expanding the "port" option of the smtp transport.
611
4304270b
TK
612TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
613 while reading a MIME header. Thanks to Tom Hughes for a patch.
614
750af86e
PH
615PH/24 Include config.h inside local_scan.h so that configuration settings are
616 available.
617
64ffc24f
PH
618PH/25 Make $smtp_command_argument available after all SMTP commands. This means
619 that in an ACL for RCPT (for example), you can examine exactly what was
620 received.
621
5dd9625b
PH
622PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
623 commands, but it was not correctly comparing the address with the actual
624 client host address. Thus, it would show the EHLO address in Received:
625 header lines when this was not necessary.
626
5591031b
PH
627PH/27 Added the % operator to ${eval:}.
628
ba18e66a
PH
629PH/28 Exim tries to create and chdir to its spool directory when it starts;
630 it should be ignoring failures (because with -C, for example, it has lost
631 privilege). It wasn't ignoring creation failures other than "already
632 exists".
633
9cec981f
PH
634PH/29 Added "crypteq" to the list of supported features that Exim outputs when
635 -bV or -d is used.
636
aa2b5c79
PH
637PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
638 because an input line was too long, either on its own, or by virtue of
1509d3a8
PH
639 too many continuations, the temporary file was not being removed, and the
640 return code was incorrect.
aa2b5c79 641
48a53b7f
PH
642PH/31 Missing "BOOL" in function definition in filtertest.c.
643
1c59d63b
PH
644PH/32 Applied Sieve patches from the maintainer.
645
671012da
TK
646TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
647
1509d3a8
PH
648PH/33 Added "verify = not_blind".
649
650PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
651 Local/Makefile (with some defaults set). These are used in built scripts
652 such as exicyclog, but they have never been used in the exim_install
653 script (though there are many overriding facilities there). I have
654 arranged that the exim_install script now takes note of these two
655 settings.
656
657PH/35 Installed configuration files for Dragonfly.
658
2fe1a124
PH
659PH/36 When a locally submitted message by a trusted user did not contain a
660 From: header, and the sender address was obtained from -f or from an SMTP
661 MAIL command, and the trusted user did not use -F to supply a sender
662 name, $originator_name was incorrectly used when constructing a From:
663 header. Furthermore, $originator_name was used for submission mode
664 messages from external hosts without From: headers in a similar way,
665 which is clearly wrong.
666
8800895a
PH
667PH/37 Added control=suppress_local_fixups.
668
ccfdb010
PH
669PH/38 When log_selector = +received_sender was set, and the addition of the
670 sender made the log line's construction buffer exactly full, or one byte
671 less than full, an overflow happened when the terminating "\n" was
672 subsequently added.
673
1130bfb0
PH
674PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
675 when the result of a list match is failure because a DNS lookup failed.
676
ebcb507f
PH
677PH/40 RM_COMMAND is now used in the building process.
678
c35e155c
PH
679PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
680 the "build-* directories that it finds.
681
95d1f782
PH
682PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
683 address in a domain literal was a prefix of an interface address.
684
fd6de02e
PH
685PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
686 when verifying a sender address, unless rewrite_headers is false.
687
58de37c5
PH
688PH/44 Wrote a long comment about why errors_to addresses are verified as
689 recipients, not senders.
690
261cf466
TF
691TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
692 the ratelimit ACL was added.
693
3ee512ff
PH
694PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
695
e08c430f
PH
696PH/46 Added extra information about PostgreSQL errors to the error string.
697
bef5a11f
PH
698PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
699 avoiding the need to install special zones in a real server. This is
700 backwards compatible; if it can't find the fake resolver, it drops back.
701 Thus, both old and new test suites can be run.
702
7546de58
TF
703TF/02 Added util/ratelimit.pl
704
e5d5a95f
TF
705TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
706 clock is set back in time.
707
2e88a017
TF
708TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
709 Candler <B.Candler@pobox.com>.
710
a5f65aa4
TF
711TF/05 The fix for PH/43 was not completely correct; widen_domains is always
712 OK for addresses that are the result of redirections.
713
e7726cbf
PH
714PH/48 A number of further additions for the benefit of the new test suite,
715 including a fake gethostbyname() that interfaces to the fake DNS resolver
716 (see PH/47 above).
717
a7fdad5b
TF
718TF/06 The fix for widen_domains has also been applied to qualify_single and
719 search_parents which are the other dnslookup options that can cause
720 header rewrites.
721
6af56900
PH
722PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
723 type ("H").
724
0925ede6
PH
725PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
726
66afa403
TF
727TF/07 Exim produced the error message "an SRV record indicated no SMTP
728 service" if it encountered an MX record with an empty target hostname.
729 The message is now "an MX or SRV record indicated no SMTP service".
730
0154e85a
TF
731TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
732 if the DNS of the sending site is misconfigured. This is quite a
733 common situation. This change restores the behaviour of treating a
734 helo verification defer as a failure.
735
16f12c76
PH
736PH/51 If self=fail was set on a router, the bounce message did not include the
737 actual error message.
738
bbe902f0 739
e5a9dba6
PH
740Exim version 4.52
741-----------------
742
743TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
744
22c3b60b
PH
745PH/01 When a transport filter timed out in a pipe delivery, and the pipe
746 command itself ended in error, the underlying message about the transport
747 filter timeout was being overwritten with the pipe command error. Now the
748 underlying error message should be appended to the second error message.
749
06a9b4b5
PH
750TK/01 Fix poll() being unavailable on Mac OSX 10.2.
751
c1ac6996
PH
752PH/02 Reduce the amount of output that "make" produces by default. Full output
753 can still be requested.
754
9c7a242c
PH
755PH/03 The warning log line about a condition test deferring for a "warn" verb
756 was being output only once per connection, rather than after each
757 occurrence (because it was using the same function as for successful
758 "warn" verbs). This seems wrong, so I have changed it.
759
87ba3f5f
PH
760TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
761 it should not have, which might have caused a crash in the right
762 circumstances, but probably never did.
763
764PH/04 Installed a modified version of Tony Finch's patch to make submission
765 mode fix the return path as well as the Sender: header line, and to
766 add a /name= option so that you can make the user's friendly name appear
767 in the header line.
768
29aba418
TF
769TF/03 Added the control = fakedefer ACL modifier.
770
fe0dab11
TF
771TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
772 Mark Lowes for thorough testing.
870f6ba8 773
11d337a4
TK
774TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
775
776TK/03 Merged latest SRS patch from Miles Wilton.
777
415c8f3b
PH
778PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
779 with the definition in sysexits.h (which is #included earlier).
780 Fortunately, Exim does not actually use EX_OK. The code used to try to
781 preserve the sysexits.h value, by assumimg that macro definitions were
782 scanned for macro replacements. I have been disabused of this notion,
783 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 784
958541e9
PH
785PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
786 in the smtp transport. When a block could not be written in a single
787 write() function, the timeout was being re-applied to each part-write.
788 This seems wrong - if the receiver was accepting one byte at a time it
789 would take for ever. The timeout is now adjusted when this happens. It
790 doesn't have to be particularly precise.
791
c206415f
TK
792TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
793 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
794
2a4be8f9
PH
795PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
796 without a domain if the check to <postmaster@domain> fails.
797
1cba11c5
SC
798SC/01 Eximstats: added -xls and the ability to specify output files
799 (patch written by Frank Heydlauf).
800
801SC/02 Eximstats: use FileHandles for outputing results.
802
803SC/03 Eximstats: allow any combination of xls, txt, and html output.
804
805SC/04 Eximstats: fixed display of large numbers with -nvr option
806
807SC/05 Eximstats: fixed merging of reports with empty tables.
808
809SC/06 Eximstats: added the -include_original_destination flag
810
811SC/07 Eximstats: removed tabs and trailing whitespace.
812
1005d00e
TK
813TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
814
815TK/06 MBOX spool code: Add real "From " MBOX separator line
816 so the .eml file is really in mbox format (even though
817 most programs do not really care). Patch from Alex Miller.
818
819TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
820 The latter is generated from $received_to and is only set if the
821 message has one envelope recipient. SA can use these headers,
822 obviously out-of-the-box. Patch from Alex Miller.
823
9b4768fa
PH
824PH/08 The ${def test on a variable was returning false if the variable's
825 value was "0", contrary to what the specification has always said!
826 The result should be true unless the variable is empty.
827
828PH/09 The syntax error of a character other than { following "${if
829 def:variable_name" (after optional whitespace) was not being diagnosed.
830 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
831 accidental colon was present, for example, could give incorrect results.
832
0d7eb84a
PH
833PH/10 Tidied the code in a number of places where the st_size field of a stat()
834 result is used (not including appendfile, where other changes are about
835 to be made).
836
837PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
838 This involved changing a lot of size variables from int to off_t. It
839 should work with maildirs and everything.
840
40727bee
TK
841TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
842 spamd dying while we are connected to it.
843
554d2369
TF
844TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
845 <jgh@wizmail.org>
846
1f922db1
PH
847PH/12 Applied Alex Kiernan's patch for the API change for the error callback
848 function for BDB 4.3.
849
ef213c3b
PH
850PH/13 Changed auto_thaw such that it does not apply to bounce messages.
851
8ac170f3
PH
852PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
853 the sources for PCRE have been re-arranged and more files are now
854 involved.
855
b1c749bb
PH
856PH/15 The code I had for printing potentially long long variables in PH/11
857 above was not the best (it lost precision). The length of off_t variables
858 is now inspected at build time, and an appropriate printing format (%ld
c6c2dc1d
PH
859 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
860 to be "long long int" or "long int". This is needed for the internal
861 formatting function string_vformat().
b1c749bb 862
4aac9b49
PH
863PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
864 the configuration file to be ":syslog", then the script "guesses" where
865 the logs files are, rather than using the compiled in default. In our
866 case the guess is not the same as the compiled default, so the script
867 suddenly stopped working when I started to use syslog. The patch checks
868 to see if log_file_path is "". If so, it attempts to read it from exim
869 with no configuration file to get the compiled in version, before it
870 falls back to the previous guessing code."
871
294520c8
TK
872TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
873 implementing BATV in an Exim configuration. See NewStuff for the gory
874 details.
875
5bd022fe
PH
876PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
877 Makefile that are specific to HP-UX.
878
90e9ce59
PH
879PH/18 If the "use_postmaster" option was set for a recipient callout together
880 with the "random" option, the postmaster address was used as the MAIL
881 FROM address for the random test, but not for the subsequent recipient
882 test. It is now used for both.
883
5ea81592
PH
884PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
885 patch removes a few documentation additions to RFC 3028, because the
886 latest draft now contains them. It adds the new en;ascii-case comparator
887 and a new error check for 8bit text in MIME parts. Comparator and
888 require names are now matched exactly. I enabled the subaddress
889 extension, but it is not well tested yet (read: it works for me)."
890
c6c2dc1d
PH
891PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
892 rework some of the code of TK/09 above to avoid the hardwired use of
893 "%lld" and "long long". Replaced the call to snprintf() with a call to
894 string_vformat().
895
fffffe4c
PH
896PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
897 records point to non-existent hosts", "retry timeout exceeded", and
898 "retry time not reached for any host after a long failure period".
ca02eafb 899
9a26b6b2
PH
900PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
901 experimental DomainKeys support:
902
903 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
904 (2) On an error such as an illegally used "control", the wrong name for
905 the control was given.
906
907 These problems did NOT occur unless DomainKeys support was compiled.
908
4aee0225
PH
909PH/23 Added daemon_startup_retries and daemon_startup_sleep.
910
32d668a5
PH
911PH/24 Added ${if match_ip condition.
912
8187c3f3
PH
913PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
914 databases so that it will be absolutely obvious if a crash occurs in the
915 DB library. This is a regular occurrence (often caused by mis-matched
916 db.h files).
917
ff790e47 918PH/26 Insert a lot of missing (void) casts for functions such as chown(),
f1e894f3
PH
919 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
920 picked up on a user's system that detects such things. There doesn't seem
921 to be a gcc warning option for this - only an attribute that has to be
922 put on the function's prototype. It seems that in Fedora Core 4 they have
923 set this on a number of new functions. No doubt there will be more in due
924 course.
ff790e47 925
5417f6d1
PH
926PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
927 specify a transport. However, if an address that was verified by such a
928 router was the subject of a callout, Exim crashed because it tried to
929 read the rcpt_include_affixes from the non-existent transport. Now it
930 just assumes that the setting of that option is false. This bug was
931 introduced by 4.51/PH/31.
932
59cf8544
PH
933PH/28 Changed -d+all to exclude +memory, because that information is very
934 rarely of interest, but it makes the output a lot bigger. People tend to
935 do -d+all out of habit.
936
e7ad8a65
PH
937PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
938 code in os-type was giving problems when libc.so lives in lib64, like on
939 x86_64 Fedora Core.
940
ade42478
PH
941PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
942 aren't the modern standard, and it seems that some systems' include files
943 don't always have them. Exim was already checking for some of the newer
944 ones like T_AAAA, and defining it itself. I've added checks for all the
945 record types that Exim uses.
946
182ad5cf
PH
947PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
948 not automatically generating a new one, as it is supposed to. This
949 prevented TLS from working. If the file did exist, but contained invalid
950 data, a new version was generated, as expected. It was only the case of a
951 non-existent file that was broken.
952
b0d9fc80
TK
953TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
954 with a change in libdomainkeys > 0.64.
955
956TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
957 from DNS. If the selector record carries the flag, it now has
958 precedence over the domain-wide flag.
959
960TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
961
47c7a64a
PH
962PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
963 the use of a port name that isn't defined in /etc/services) occurred, the
964 message was deferred as in a normal delivery, and thus remained on the
965 spool, instead of being failed because of the mua_wrapper setting. This
966 is now fixed, and I tidied up some of the mua_wrapper messages at the
967 same time.
968
a388bce4
SC
969SC/08 Eximstats: whilst parsing the mainlog(s), store information about
970 the messages in a hash of arrays rather than using individual hashes.
971 This is a bit cleaner and results in dramatic memory savings, albeit
972 at a slight CPU cost.
973
974SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
975 as requested by Marc Sherman.
976
977SC/10 Eximstats: added histograms for user specified patterns as requested
978 by Marc Sherman.
979
0793e4ed
SC
980SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
981
c58b88df
PH
982PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
983 fopen() in the content-scanning modules that did not already have it.
984
e7ad8a65 985
7982096b
PH
986Exim version 4.51
987-----------------
988
1a46a8c5
PH
989TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
990 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
991
2f079f46 992TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
PH
993
994TK/03 Fix ACL "regex" condition not being available in MIME ACL.
995
996PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
997 to test Sieve filters that use "vacation".
998
999PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1000 that changes the way the GnuTLS parameters are stored in the cache file.
1001 The new format can be generated externally. For backward compatibility,
1002 if the data in the cache doesn't make sense, Exim assumes it has read an
1003 old-format file, and it generates new data and writes a new file. This
1004 means that you can't go back to an older release without removing the
1005 file.
1006
1007PH/03 A redirect router that has both "unseen" and "one_time" set does not
1008 work if there are any delivery delays because "one_time" forces the
1009 parent to be marked "delivered", so its unseen clone is never tried
1010 again. For this reason, Exim now forbids the simultaneous setting of
1011 these two options.
1012
1013PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1014 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1015 entry if you want to know the details. The fix, however, neglected to
1016 consider the case when local delivery batching is involved. The test for
1017 "previously delivered" was not happening when checking to see if an
1018 address could be batched with a previous (undelivered) one; under
1019 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 1020 address.
1a46a8c5
PH
1021
1022PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1023 in its include files, and this causes problems building Exim.
1024
1025PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1026 header_syntax) but Exim was just ignoring anything given after a slash.
1027 In particular, this caused confusion with an attempt to use "verify =
1028 reverse_host_lookup/defer_ok". An error is now given when options are
1029 supplied for verify items that do not have them. (Maybe reverse_host_
1030 lookup should have a defer_ok option, but that's a different point.)
1031
1032PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1033 defined by RFC 821) to 2048, because there were problems with some AUTH
1034 commands, and RFC 1869 says the size should be increased for extended
1035 SMTP commands that take arguments.
1036
1037PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1038 Finch).
1039
1040PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1041 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 1042
49c2d5ea
PH
1043PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1044 an address' error message when a string expansion fails (syntax or
f331f3b6
PH
1045 whatever). Otherwise the password may appear in the log. Following change
1046 PH/42 below, there is no longer a chance of it appearing in a bounce
1047 message.
49c2d5ea 1048
bf759a8b
PH
1049PH/11 Installed exipick version 20050225.0 from John Jetmore.
1050
83364d30
PH
1051PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1052 of its addresses was ever tried. (Bugzilla bug #2.)
1053
7999bbd7
PH
1054PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1055 the result incorrectly in the debug output. (It correctly added a newline
1056 to what was transported.)
1057
7dbf77c9
PH
1058TF/01 Added $received_time.
1059
74e0617f
PH
1060PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1061 commented out examples of how to interface to a virus scanner and to
1062 SpamAssassin. Also added commented examples of av_scanner and
1063 spamd_address settings.
1064
2f079f46
PH
1065PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1066 and controls are allowed in which ACLs. There were a couple of minor
1067 errors. Some of the entries in the conditions table (which is a table of
1068 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1069 negation of where the condition IS allowed.
1070
8c841523
PH
1071PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1072
7766a4f0
PH
1073PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1074 header file does not have a version number, so I've had to invent a new
1075 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1076 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1077 radiusclient), but it was contributed by a Radius user.
1078
8b417f2c
PH
1079PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1080 files or directories, for OpenSSL.
1081
901f42cb
PH
1082PH/19 When an Exim process that is running as root has to create an Exim log
1083 file, it does so in a subprocess that runs as exim:exim so as to get the
1084 ownership right at creation (otherwise, other Exim processes might see
1085 the file with the wrong ownership). There was no test for failure of this
1086 fork() call, which would lead to the process getting stuck as it waited
1087 for a non-existent subprocess. Forks do occasionally fail when resources
1088 run out. I reviewed all the other calls to fork(); they all seem to check
1089 for failure.
1090
f9b9210e
PH
1091PH/20 When checking for unexpected SMTP input at connect time (before writing
1092 the banner), Exim was not dealing correctly with a non-positive return
1093 from the read() function. If the client had disconnected by this time,
1094 the result was a log entry for a synchronization error with an empty
1095 string after "input=" when read() returned zero. If read() returned -1
1096 (an event I could not check), uninitialized data bytes were printed.
1097 There were reports of junk text (parts of files, etc) appearing after
1098 "input=".
1099
54cdb463
PH
1100PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1101
cf00dad6
PH
1102PH/22 Added support for macro redefinition, and (re)definition in between
1103 driver and ACL definitions.
1104
acb1b346
PH
1105PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1106 forgetting to use the resulting value; it was using the unexpanded value.
1107
c5ddb310
PH
1108PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1109 hadn't been configured. The fix is from Juergen Kreileder, who
1110 understands it better than I do:
1111
1112 "Here's what I see happening with three configured cyrus_sasl
1113 authenticators configured (plain, login, cram-md5):
1114
1115 On startup auth_cyrus_sasl_init() gets called for each of these.
1116 This means three calls to sasl_listmech() without a specified mech_list.
1117 => SASL tests which mechs of all available mechs actually work
1118 => three warnings about OTP not working
1119 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1120
1121 With the patch, sasl_listmech() also gets called three times. But now
1122 SASL's mech_list option is set to the server_mech specified in the the
1123 authenticator. Or in other words, the answer from sasl_listmech()
1124 gets limited to just the mech you're testing for (which is different
1125 for each call.)
1126 => the return list contains just 'plain' or 'login', 'cram-md5' or
1127 nothing depending on the value of ob->server_mech.
1128
1129 I've just tested the patch: Authentication still works fine,
1130 unavailable mechs specified in the exim configuration are still
1131 caught, and the auth.log warnings about OTP are gone."
1132
31619da6
PH
1133PH/25 When debugging is enabled, the contents of the command line are added
1134 to the debugging output, even when log_selector=+arguments is not
1135 specified.
1136
bebaf0fc
PH
1137PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1138 answer is "GNU", and only if the return is "GNU/something" is the answer
1139 "Linux".
1140
475fe28a
PH
1141PH/27 $acl_verify_message is now set immediately after the failure of a
1142 verification in an ACL, and so is available in subsequent modifiers. In
1143 particular, the message can be preserved by coding like this:
1144
1145 warn !verify = sender
1146 set acl_m0 = $acl_verify_message
1147
1148 Previously, $acl_verify_message was set only while expanding "message"
1149 and "log_message" when a very denied access.
1150
7e8bec7a
PH
1151PH/28 Modified OS/os.c-Linux with
1152
1153 -#ifndef OS_LOAD_AVERAGE
1154 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1155
1156 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1157 nomenclature these days.)
1158
e4a89c47
PH
1159PH/29 Installed patch from the Sieve maintainer that adds the options
1160 sieve_useraddress and sieve_subaddress to the redirect router.
1161
5ca2a9a1
PH
1162PH/30 In these circumstances:
1163 . Two addresses routed to the same list of hosts;
1164 . First host does not offer TLS;
1165 . First host accepts first address;
1166 . First host gives temporary error to second address;
1167 . Second host offers TLS and a TLS session is established;
1168 . Second host accepts second address.
1169 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1170 and peerdn, if requested) that were in fact used only for the second
1171 address.
7e8bec7a 1172
c688b954
PH
1173PH/31 When doing a callout as part of verifying an address, Exim was not paying
1174 attention to any local part prefix or suffix that was matched by the
1175 router that accepted the address. It now behaves in the same way as it
1176 does for delivery: the affixes are removed from the local part unless
1177 rcpt_include_affixes is set on the transport.
1178
fed77020
PH
1179PH/32 Add the sender address, as F=<...>, to the log line when logging a
1180 timeout during the DATA phase of an incoming message.
1181
7fe1560f
PH
1182PH/33 Sieve envelope tests were broken for match types other than :is. I have
1183 applied a patch sanctioned by the Sieve maintainer.
c688b954 1184
ebb6e6d5
PH
1185PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1186 the uid or gid is negative. A case of a negative gid caused this to be
1187 noticed. The fix allows for either to be negative.
1188
9c4e8f60
PH
1189PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1190 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1191 overlooked.
1192
1193PH/36 The change PH/12 above was broken. Fixed it.
1194
d7174846
PH
1195PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1196 the grounds that routing the same address twice would always produce the
1197 same answer. This might have been true once, but it is certainly no
1198 longer true now. Routing a child address may depend on the previous
1199 routing that produced that child. Some complicated redirection strategies
1200 went wrong when messages had multiple recipients, and made Exim's
1201 behaviour dependent on the order in which the addresses were given.
1202
1203 I have moved the duplicate checking until after the routing is complete.
1204 Exim scans the addresses that are assigned to local and remote
1205 transports, and removes any duplicates. This means that more work will be
1206 done, as duplicates will always all be routed, but duplicates are
1207 presumably rare, so I don't expect this is of any significance.
1208
1209 For deliveries to pipes, files, and autoreplies, the duplicate checking
1210 still happens during the routing process, since they are not going to be
1211 routed further.
1212
cfe75fc3
PH
1213PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1214 It corrects a timeout issue with spamd. This is Ian's comment: "The
1215 background is that sometimes spamd either never reads data from a
1216 connection it has accepted, or it never writes response data. The exiscan
1217 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1218 blindly assumes that writes won't block so it may never time out."
1219
be22d70e
PH
1220PH/39 Allow G after quota size as well as K and M.
1221
0612b098
PH
1222PH/40 The value set for $authenticated_id in an authenticator may not contain
1223 binary zeroes or newlines because the value is written to log lines and
1224 to spool files. There was no check on this. Now the value is run through
1225 the string_printing() function so that such characters are converted to
1226 printable escape sequences.
1227
2e0c1448
PH
1228PH/41 $message_linecount is a new variable that contains the total number of
1229 lines in the message. Compare $body_linecount, which is the count for the
1230 body only.
1231
447d236c
PH
1232PH/42 Exim no longer gives details of delivery errors for specific addresses in
1233 bounce and delay warning messages, except in certain special cases, which
1234 are as follows:
1235
1236 (a) An SMTP error message from a remote host;
1237 (b) A message specified in a :fail: redirection;
1238 (c) A message specified in a "fail" command in a system filter;
1239 (d) A message specified in a FAIL return from the queryprogram router;
1240 (e) A message specified by the cannot_route_message router option.
1241
1242 In these cases only, Exim does include the error details in bounce and
1243 warning messages. There are also a few cases where bland messages such
1244 as "unrouteable address" or "local delivery error" are given.
1245
d20976dc
PH
1246PH/43 $value is now also set for the "else" part of a ${run expansion.
1247
f656d135
PH
1248PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1249 being worked on, but at least Exim now implements the latest version to
1250 play with."
1251
2e2a30b4
PH
1252PH/45 In a pipe transport, although a timeout while waiting for the pipe
1253 process to complete was treated as a delivery failure, a timeout while
1254 writing the message to the pipe was logged, but erroneously treated as a
1255 successful delivery. Such timeouts include transport filter timeouts. For
1256 consistency with the overall process timeout, these timeouts are now
1257 treated as errors, giving rise to delivery failures by default. However,
1258 there is now a new Boolean option for the pipe transport called
1259 timeout_defer, which, if set TRUE, converts the failures into defers for
1260 both kinds of timeout. A transport filter timeout is now identified in
1261 the log output.
1262
9176e9f0
PH
1263PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1264 systems where "make" and "gmake" are different, calling "gmake" at top
1265 level broke things. I've arranged for the value of $(MAKE) to be passed
1266 from the Makefile to this script so that it can call the same version of
1267 "make".
1268
7982096b 1269
bbe902f0
PH
1270A note about Exim versions 4.44 and 4.50
1271----------------------------------------
1272
1273Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1274changes of various kinds. As a consequence, a big documentation update was
1275needed. This delayed the release for rather longer than seemed good, especially
1276in the light of a couple of (minor) security issues. Therefore, the changes
1277that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1278release. So 4.44 and 4.50 are in effect two different branches that both start
1279from 4.43.
1280
1281I have left the 4.50 change log unchanged; it contains all the changes since
12824.43. The change log for 4.44 is below; many of its items are identical to
1283those for 4.50. This seems to be the most sensible way to preserve the
1284historical information.
1285
1286
f7b63901 1287Exim version 4.50
495ae4b0
PH
1288-----------------
1289
5fe762f6
PH
1290 1. Minor wording change to the doc/README.SIEVE file.
1291
139059f6 1292 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 1293 computation of the current number of files was incorrect.
495ae4b0 1294
7086e875
PH
1295 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1296 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1297 place.
1298
35af9f61
PH
1299 4. Give more explanation in the error message when the command for a transport
1300 filter fails to execute.
1301
b668c215
PH
1302 5. There are several places where Exim runs a non-Exim command in a
1303 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1304 was being done only for the command run by the queryprogram router. It is
1305 now done for all such subprocesses. The other cases are: ${run, transport
1306 filters, and the commands run by the lmtp and pipe transports.
1307
a494b1e1
PH
1308 6. Added CONFIGURE_GROUP build-time option.
1309
1310 7. Some older OS have a limit of 256 on the maximum number of file
1311 descriptors. Exim was using setrlimit() to set 1000 as a large value
1312 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1313 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 1314
c5fcb476
PH
1315 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1316 was an oversight, and furthermore, ever since the addition of extra
1317 controls (e.g. 4.43/32), the checks on when to allow different forms of
1318 "control" were broken. There should now be diagnostics for all cases when a
1319 control that does not make sense is encountered.
1320
69358f02
PH
1321 9. Added the /retain_sender option to "control=submission".
1322
5be20824
PH
132310. $recipients is now available in the predata ACL (oversight).
1324
eb2c0248
PH
132511. Tidy the search cache before the fork to do a delivery from a message
1326 received from the command line. Otherwise the child will trigger a lookup
1327 failure and thereby defer the delivery if it tries to use (for example) a
1328 cached ldap connection that the parent has called unbind on.
1329
2a3eea10
PH
133012. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1331 of $address_data from the recipient verification was clobbered by the
1332 sender verification.
1333
133413. The value of address_data from a sender verification is now available in
1335 $sender_address_data in subsequent conditions in the ACL statement.
1336
23c7ff99
PH
133714. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1338
4deaf07d
PH
133915. Added a new option "connect=<time>" to callout options, to set a different
1340 connection timeout.
1341
926e1192
PH
134216. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1343 was its contents. (It was OK if the option was not defined at all.)
1344
650edc6f
PH
134517. A "Completed" log line is now written for messages that are removed from
1346 the spool by the -Mrm option.
1347
2c7db3f5
PH
134818. New variables $sender_verify_failure and $recipient_verify_failure contain
1349 information about exactly what failed.
1350
3d235903
PH
135119. Added -dd to debug only the daemon process.
1352
7c7ad977
PH
135320. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1354 handles timeouts, both on the server side and network timeouts. Renamed the
1355 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1356
981756db
PH
135721. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1358 It is now set to "smtps".
1359
d4eb88df
PH
136022. $host_address is now set to the target address during the checking of
1361 ignore_target_hosts.
1362
136323. When checking ignore_target_hosts for an ipliteral router, no host name was
1364 being passed; this would have caused $sender_host_name to have been used if
1365 matching the list had actually called for a host name (not very likely,
1366 since this list is usually IP addresses). A host name is now passed as
1367 "[x.x.x.x]".
1368
7d468ab8
PH
136924. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1370 code that specifies a non-restarting handler (typically sigaction() in
1371 modern systems) in an attempt to fix a rare and obscure crash bug.
1372
137325. Narrowed the window for a race in the daemon that could cause it to ignore
1374 SIGCHLD signals. This is not a major problem, because they are used only to
1375 wake it up if nothing else does.
1376
62c0818f
PH
137726. A malformed maildirsize file could cause Exim to calculate negative values
1378 for the mailbox size or file count. Odd effects could occur as a result.
1379 The maildirsize information is now recalculated if the size or filecount
1380 end up negative.
1381
26034054
PH
138227. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1383 support for a long time. Removed HAVE_SYS_VFS_H.
1384
af66f652
PH
138528. Installed the latest version of exipick from John Jetmore.
1386
90af77f4
PH
138729. In an address list, if the pattern was not a regular expression, an empty
1388 subject address (from a bounce message) matched only if the pattern was an
1389 empty string. Non-empty patterns were not even tested. This was the wrong
1390 because it is perfectly reasonable to use an empty address as part of a
1391 database query. An empty address is now tested by patterns that are
1392 lookups. However, all the other forms of pattern expect the subject to
1393 contain a local part and a domain, and therefore, for them, an empty
1394 address still always fails if the pattern is not itself empty.
1395
d8ef3577
PH
139630. Exim went into a mad DNS loop when attempting to do a callout where the
1397 host was specified on an smtp transport, and looking it up yielded more
1398 than one IP address.
1399
5cb8cbc6
PH
140031. Re-factored the code for checking spool and log partition space into a
1401 function that finds that data and another that does the check. The former
1402 is then used to implement four new variables: $spool_space, $log_space,
1403 $spool_inodes, and $log_inodes.
1404
14702f5b
PH
140532. The RFC2047 encoding function was originally intended for short strings
1406 such as real names; it was not keeping to the 75-character limit for
1407 encoded words that the RFC imposes. It now respects the limit, and
1408 generates multiple encoded words if necessary. To be on the safe side, I
1409 have increased the buffer size for the ${rfc2047: expansion operator from
1410 1024 to 2048 bytes.
1411
063b1e99
PH
141233. It is now permitted to omit both strings after an "if" condition; if the
1413 condition is true, the result is "true". As before, when the second string
1414 is omitted, a false condition yields an empty string. This makes it less
1415 cumbersome to write custom ACL and router conditions.
1416
652e1b65
PH
141734. Failure to deliver a bounce message always caused it to be frozen, even if
1418 there was an errors_to setting on the router. The errors_to setting is now
1419 respected.
1420
6f0c9a4f
PH
142135. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1422 canonical form (fully expanded) before being placed in
1423 $sender_host_address.
1424
33397d19
PH
142536. The table in the code that translates DNS record types into text (T_A to
1426 "A" for instance) was missing entries for NS and CNAME. It is just possible
1427 that this could have caused confusion if both these types were looked up
1428 for the same domain, because the text type is used as part of Exim's
1429 per-process caching. But the chance of anyone hitting this buglet seems
1430 very small.
1431
7bb56e1f
PH
143237. The dnsdb lookup has been extended in a number of ways.
1433
1434 (1) There is a new type, "zns", which walks up the domain tree until it
1435 finds some nameserver records. It should be used with care.
1436
ea3bc19b
PH
1437 (2) There is a new type, "mxh", which is like "mx" except that it returns
1438 just the host names, not the priorities.
1439
1440 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
1441 looked up. The behaviour when one of the lookups defers can be
1442 controlled by a keyword.
7bb56e1f 1443
ea3bc19b 1444 (4) It is now possible to specify the separator character for use when
7bb56e1f 1445 multiple records are returned.
33397d19 1446
0bcb2a0e
PH
144738. The dnslists ACL condition has been extended: it is now possible to supply
1448 a list of IP addresses and/or domains to be looked up in a particular DNS
1449 domain.
1450
2ac0e484
PH
145139. Added log_selector=+queue_time_overall.
1452
4e1fde53
PH
145340. When running the queue in the test harness, wait just a tad after forking a
1454 delivery process, to get repeatability of debugging output.
1455
de365ded
PH
145641. Include certificate and key file names in error message when GnuTLS fails
1457 to set them up, because the GnuTLS error message doesn't include the name
1458 of the failing file when there is a problem reading it.
1459
f05da2e8
PH
146042. Allow both -bf and -bF in the same test run.
1461
d6453af2
PH
146243. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1463
f7b63901
PH
146444. The "Exiscan patch" is now merged into the mainline Exim source.
1465
146645. Sometimes the final signoff response after QUIT could fail to get
1467 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1468 < 0 before doing a fflush(). This bug looks as though it goes back to the
1469 introduction of TLS in release 3.20, but "sometimes" must have been rare
1470 because the tests only now provoked it.
1471
a444213a
PH
147246. Reset the locale to "C" after calling embedded Perl, in case it was changed
1473 (this can affect the format of dates).
1474
0ec020ea
PH
147547. exim_tidydb, when checking for the continued existence of a message for
1476 which it has found a message-specific retry record, was not finding
1477 messages that were in split spool directories. Consequently, it was
1478 deleting retry records that should have stayed in existence.
1479
b1206957
PH
148048. Steve fixed some bugs in eximstats.
1481
148249. The SPA authentication driver was not abandoning authentication and moving
1483 on to the next authenticator when an expansion was forced to fail,
1484 contradicting the general specification for all authenticators. Instead it
1485 was generating a temporary error. It now behaves as specified.
1486
26dd5a95
PH
148750. The default ordering of permitted cipher suites for GnuTLS was pessimal
1488 (the order specifies the preference for clients). The order is now AES256,
1489 AES128, 3DES, ARCFOUR128.
1490
343b2385
PH
149151. Small patch to Sieve code - explicitly set From: when generating an
1492 autoreply.
1493
1c5466b9
PH
149452. Exim crashed if a remote delivery caused a very long error message to be
1495 recorded - for instance if somebody sent an entire SpamAssassin report back
1496 as a large number of 550 error lines. This bug was coincidentally fixed by
1497 increasing the size of one of Exim's internal buffers (big_buffer) that
1498 happened as part of the Exiscan merge. However, to be on the safe side, I
1499 have made the code more robust (and fixed the comments that describe what
1500 is going on).
1501
55ee9ee3
PH
150253. Now that there can be additional text after "Completed" in log lines (if
1503 the queue_time_overall log selector is set), a one-byte patch to exigrep
1504 was needed to allow it to recognize "Completed" as not the last thing in
1505 the line.
1506
d38f8232
PH
150754. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1508 patch that reportedly fixes this has been added. I am not expert enough to
1509 create a test for it. This is what the patch creator wrote:
1510
1511 "I found a little strange behaviour of ldap code when working with
1512 Windows 2003 AD Domain, where users was placed in more than one
1513 Organization Units. When I tried to give exim partial DN, the exit code
1514 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1515 But simultaneously result of request was absolutely normal ldap result,
1516 so I produce this patch..."
1517
3295e65b
PH
1518 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1519 REFERENCE, so I have modified the code to exclude the patch when that macro
1520 is not defined.
1521
7102e136
PH
152255. Some experimental protocols are using DNS PTR records for new purposes. The
1523 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
1524 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1525 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 1526 CAN-2005-0021
7102e136 1527
3ca0ba97
PH
152856. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1529
c2bcbe20
PH
153057. Double the size of the debug message buffer (to 2048) so that more of very
1531 long debug lines gets shown.
1532
18ce445d
PH
153358. The exicyclog utility now does better if the number of log files to keep
1534 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1535
1f5b4c3d
PH
153659. Two changes related to the smtp_active_hostname option:
1537
1538 (1) $smtp_active_hostname is now available as a variable.
1539 (2) The default for smtp_banner uses $smtp_active_hostname instead
1540 of $primary_hostname.
1541
b975ba52
PH
154260. The host_aton() function is supposed to be passed a string that is known
1543 to be a valid IP address. However, in the case of IPv6 addresses, it was
1544 not checking this. This is a hostage to fortune. Exim now panics and dies
1545 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
1546 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1547 components; fortuitously, this particular loophole had already been fixed
1548 by change 4.50/55 above.
1549
1550 If there are any other similar loopholes, the new check in host_aton()
1551 itself should stop them being exploited. The report I received stated that
1552 data on the command line could provoke the exploit when Exim was running as
1553 exim, but did not say which command line option was involved. All I could
1554 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1555 running as the user.
ea3a6f44 1556 CAN-2005-0021
85b87bc2
PH
1557
155861. There was a buffer overflow vulnerability in the SPA authentication code
1559 (which came originally from the Samba project). I have added a test to the
1560 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 1561 CAN-2005-0022
b975ba52 1562
17ffcae7
PH
156362. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1564 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1565
d95f9fdb
PH
156663. The daemon start-up calls getloadavg() while still root for those OS that
1567 need the first call to be done as root, but it missed one case: when
1568 deliver_queue_load_max is set with deliver_drop_privilege. This is
1569 necessary for the benefit of the queue runner, because there is no re-exec
1570 when deliver_drop_privilege is set.
1571
86b8287f
PH
157264. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1573 This has been fixed.
1574
60dc5e56
PH
157565. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1576 was in use, was not putting the data itself into the right store pool;
1577 consequently, it could be overwritten for a subsequent message in the same
1578 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1579 the caching.)
1580
533244af
PH
158166. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1582
a5a28604
PH
158367. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1584 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1585 the function were treating the return as a boolean value, which happened to
1586 work because 0=false and not-0=true, but is not correct code.
1587
7e634d24
PH
158868. The host_aton() function was not handling scoped IPv6 addresses (those
1589 with, for example, "%eth0" on the end) correctly.
1590
3e11c26b
PH
159169. Fixed some compiler warnings in acl.c for the bitmaps specified with
1592 negated items (that is, ~something) in unsigned ints. Some compilers
1593 apparently mutter when there is no cast.
1594
6729cf78
PH
159570. If an address verification called from an ACL failed, and did not produce a
1596 user-specific message (i.e. there was only a "system" message), nothing was
1597 put in $acl_verify_message. In this situation, it now puts the system
1598 message there.
1599
00f00ca5
PH
160071. Change 4.23/11 added synchronization checking at the start of an SMTP
1601 session; change 4.31/43 added the unwanted input to the log line - except
1602 that it did not do this in the start of session case. It now does.
1603
c9bdd01c
PH
160472. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1605 This is wrong and can cause the other end to generate a synchronization
1606 error if it is another Exim or anything else that does the synchronization
1607 check. A QUIT command is no longer sent after a timeout.
1608
d43194df
PH
160973. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1610 during host lookups.
1611
fe5b5d0b
PH
161274. The defer_ok option of callout verification was not working if it was used
1613 when verifying addresses in header lines, that is, for this case:
1614
1615 verify = header_sender/callout=defer_ok
1616
76a2d7ba
PH
161775. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1618 those file descriptors could be used for SMTP connections. If anything
1619 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1620 could be sent to the SMTP client, causing chaos. The daemon now opens
1621 stdin, stdout, and stderr to /dev/null when it puts itself into the
1622 background.
1623
162476. Arrange for output from Perl's "warn" command to be written to Exim's main
1625 log by default. The user can override this with suitable Perl magic.
1626
04f7d5b9
PH
162777. The use of log_message on a "discard" ACL verb, which is supposed to add to
1628 the log message when discard triggers, was not working for the DATA ACL or
1629 for the non-SMTP ACL.
1630
bc60667e
PH
163178. Error message wording change in sieve.c.
1632
bb6e88ff
PH
163379. If smtp_accept_max_per_host was set, the number of connections could be
1634 restricted to fewer than expected, because the daemon was trying to set up
1635 a new connection before checking whether the processes handling previous
1636 connections had finished. The check for completed processes is now done
1637 earlier. On busy systems, this bug wouldn't be noticed because something
1638 else would have woken the daemon, and it would have reaped the completed
1639 process earlier.
1640
1e70f85b
PH
164180. If a message was submitted locally by a user whose login name contained one
1642 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1643 It caused a spool format error. I have fixed the spool reading code. A
1644 related problem was that the "from" clause in the Received: line became
1645 illegal because of the space(s). It is now covered by ${quote_local_part.
1646
164781. Included the latest eximstats from Steve (adds average sizes to HTML Top
1648 tables).
1649
4e01f9d6
PH
165082. Updated OS/Makefile-AIX as per message from Mike Meredith.
1651
1ee1cef2
PH
165283. Patch from Sieve maintainer to fix unterminated string problem in
1653 "vacation" handling.
1654
6e2b4ccc
PH
165584. Some minor changes to the Linux configuration files to help with other
1656 OS variants using glibc.
1657
8e669ac1
PH
165885. One more patch for Sieve to update vacation handling to latest spec.
1659
495ae4b0 1660
bbe902f0
PH
1661----------------------------------------------------
1662See the note above about the 4.44 and 4.50 releases.
1663----------------------------------------------------
1664
1665
1666Exim version 4.44
1667-----------------
1668
1669 1. Change 4.43/35 introduced a bug that caused file counts to be
1670 incorrectly computed when quota_filecount was set in an appendfile
1671 transport
1672
1673 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1674 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1675 place.
1676
1677 3. Give more explanation in the error message when the command for a transport
1678 filter fails to execute.
1679
1680 4. There are several places where Exim runs a non-Exim command in a
1681 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1682 was being done only for the command run by the queryprogram router. It is
1683 now done for all such subprocesses. The other cases are: ${run, transport
1684 filters, and the commands run by the lmtp and pipe transports.
1685
1686 5. Some older OS have a limit of 256 on the maximum number of file
1687 descriptors. Exim was using setrlimit() to set 1000 as a large value
1688 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1689 systems. I've change it so that if it can't get 1000, it tries for 256.
1690
1691 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1692 was an oversight, and furthermore, ever since the addition of extra
1693 controls (e.g. 4.43/32), the checks on when to allow different forms of
1694 "control" were broken. There should now be diagnostics for all cases when a
1695 control that does not make sense is encountered.
1696
1697 7. $recipients is now available in the predata ACL (oversight).
1698
1699 8. Tidy the search cache before the fork to do a delivery from a message
1700 received from the command line. Otherwise the child will trigger a lookup
1701 failure and thereby defer the delivery if it tries to use (for example) a
1702 cached ldap connection that the parent has called unbind on.
1703
1704 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1705 of $address_data from the recipient verification was clobbered by the
1706 sender verification.
1707
170810. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1709 was its contents. (It was OK if the option was not defined at all.)
1710
171111. A "Completed" log line is now written for messages that are removed from
1712 the spool by the -Mrm option.
1713
171412. $host_address is now set to the target address during the checking of
1715 ignore_target_hosts.
1716
171713. When checking ignore_target_hosts for an ipliteral router, no host name was
1718 being passed; this would have caused $sender_host_name to have been used if
1719 matching the list had actually called for a host name (not very likely,
1720 since this list is usually IP addresses). A host name is now passed as
1721 "[x.x.x.x]".
1722
172314. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1724 code that specifies a non-restarting handler (typically sigaction() in
1725 modern systems) in an attempt to fix a rare and obscure crash bug.
1726
172715. Narrowed the window for a race in the daemon that could cause it to ignore
1728 SIGCHLD signals. This is not a major problem, because they are used only to
1729 wake it up if nothing else does.
1730
173116. A malformed maildirsize file could cause Exim to calculate negative values
1732 for the mailbox size or file count. Odd effects could occur as a result.
1733 The maildirsize information is now recalculated if the size or filecount
1734 end up negative.
1735
173617. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1737 support for a long time. Removed HAVE_SYS_VFS_H.
1738
ea3a6f44 173918. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1740
174119. Allow an empty sender to be matched against a lookup in an address list.
1742 Previously the only cases considered were a regular expression, or an
1743 empty pattern.
1744
174520. Exim went into a mad DNS lookup loop when doing a callout where the
1746 host was specified on the transport, if the DNS lookup yielded more than
1747 one IP address.
1748
ea3a6f44
NM
174921. The RFC2047 encoding function was originally intended for short strings
1750 such as real names; it was not keeping to the 75-character limit for
1751 encoded words that the RFC imposes. It now respects the limit, and
1752 generates multiple encoded words if necessary. To be on the safe side, I
1753 have increased the buffer size for the ${rfc2047: expansion operator from
1754 1024 to 2048 bytes.
bbe902f0 1755
ea3a6f44
NM
175622. Failure to deliver a bounce message always caused it to be frozen, even if
1757 there was an errors_to setting on the router. The errors_to setting is now
1758 respected.
bbe902f0
PH
1759
176023. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1761 canonical form (fully expanded) before being placed in
1762 $sender_host_address.
1763
176424. Updated eximstats to version 1.33
1765
ea3a6f44
NM
176625. Include certificate and key file names in error message when GnuTLS fails
1767 to set them up, because the GnuTLS error message doesn't include the name
1768 of the failing file when there is a problem reading it.
bbe902f0
PH
1769
177026. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1771 As per change 25.
bbe902f0 1772
ea3a6f44
NM
177327. Reset the locale to "C" after calling embedded Perl, in case it was changed
1774 (this can affect the format of dates).
bbe902f0 1775
ea3a6f44
NM
177628. exim_tidydb, when checking for the continued existence of a message for
1777 which it has found a message-specific retry record, was not finding
1778 messages that were in split spool directories. Consequently, it was
1779 deleting retry records that should have stayed in existence.
bbe902f0
PH
1780
178129. eximstats updated to version 1.35
1782 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1783 1.35 - bugfix such that pie charts by volume are generated correctly
1784
ea3a6f44
NM
178530. The SPA authentication driver was not abandoning authentication and moving
1786 on to the next authenticator when an expansion was forced to fail,
1787 contradicting the general specification for all authenticators. Instead it
1788 was generating a temporary error. It now behaves as specified.
bbe902f0 1789
ea3a6f44
NM
179031. The default ordering of permitted cipher suites for GnuTLS was pessimal
1791 (the order specifies the preference for clients). The order is now AES256,
1792 AES128, 3DES, ARCFOUR128.
bbe902f0 1793
ea3a6f44
NM
179431. Small patch to Sieve code - explicitly set From: when generating an
1795 autoreply.
bbe902f0 1796
ea3a6f44
NM
179732. Exim crashed if a remote delivery caused a very long error message to be
1798 recorded - for instance if somebody sent an entire SpamAssassin report back
1799 as a large number of 550 error lines. This bug was coincidentally fixed by
1800 increasing the size of one of Exim's internal buffers (big_buffer) that
1801 happened as part of the Exiscan merge. However, to be on the safe side, I
1802 have made the code more robust (and fixed the comments that describe what
1803 is going on).
bbe902f0 1804
ea3a6f44
NM
180533. Some experimental protocols are using DNS PTR records for new purposes. The
1806 keys for these records are domain names, not reversed IP addresses. The
1807 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1808 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1809 CAN-2005-0021
1810
ea3a6f44
NM
181134. The host_aton() function is supposed to be passed a string that is known
1812 to be a valid IP address. However, in the case of IPv6 addresses, it was
1813 not checking this. This is a hostage to fortune. Exim now panics and dies
1814 if the condition is not met. A case was found where this could be provoked
1815 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1816 components; fortuitously, this particular loophole had already been fixed
1817 by change 4.50/55 or 4.44/33 above.
1818
1819 If there are any other similar loopholes, the new check in host_aton()
1820 itself should stop them being exploited. The report I received stated that
1821 data on the command line could provoke the exploit when Exim was running as
1822 exim, but did not say which command line option was involved. All I could
1823 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1824 running as the user.
bbe902f0
PH
1825 CAN-2005-0021
1826
ea3a6f44
NM
182735. There was a buffer overflow vulnerability in the SPA authentication code
1828 (which came originally from the Samba project). I have added a test to the
1829 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1830 CAN-2005-0022
1831
ea3a6f44
NM
183236. The daemon start-up calls getloadavg() while still root for those OS that
1833 need the first call to be done as root, but it missed one case: when
1834 deliver_queue_load_max is set with deliver_drop_privilege. This is
1835 necessary for the benefit of the queue runner, because there is no re-exec
1836 when deliver_drop_privilege is set.
bbe902f0 1837
ea3a6f44
NM
183837. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1839 was in use, was not putting the data itself into the right store pool;
1840 consequently, it could be overwritten for a subsequent message in the same
1841 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1842 the caching.)
bbe902f0 1843
ea3a6f44
NM
184438. Sometimes the final signoff response after QUIT could fail to get
1845 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1846 < 0 before doing a fflush(). This bug looks as though it goes back to the
1847 introduction of TLS in release 3.20, but "sometimes" must have been rare
1848 because the tests only now provoked it.
bbe902f0
PH
1849
1850
495ae4b0
PH
1851Exim version 4.43
1852-----------------
1853
1854 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1855 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1856 Now it returns an integer. A number of calls were still expecting a T/F
1857 return. Fortuitously, in all cases, the tests worked in OK situations,
1858 which is the norm. However, things would have gone wrong on any write
1859 failures on the smtp file descriptor. This function is used when sending
1860 messages over SMTP and also when doing verify callouts.
1861
1862 2. When Exim is called to do synchronous delivery of a locally submitted
1863 message (the -odf or -odi options), it no longer closes stderr before doing
1864 the delivery.
1865
1866 3. Implemented the mua_wrapper option.
1867
1868 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1869
1870 5. Implemented the functions header_remove(), header_testname(),
1871 header_add_at_position(), and receive_remove_recipient(), and exported them
1872 to local_scan().
1873
1874 6. If an ACL "warn" statement specified the addition of headers, Exim already
1875 inserted X-ACL-Warn: at the start if there was no header name. However, it
1876 was not making this test for the second and subsequent header lines if
1877 there were newlines in the string. This meant that an invalid header could
1878 be inserted if Exim was badly configured.
1879
1880 7. Allow an ACL "warn" statement to add header lines at the start or after all
1881 the Received: headers, as well as at the end.
1882
1883 8. Added the rcpt_4xx retry error code.
1884
1885 9. Added postmaster_mailfrom=xxx to callout verification option.
1886
188710. Added mailfrom=xxxx to the callout verification option, for verify=
1888 header_sender only.
1889
189011. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1891 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1892
189312. Inserted some casts to stop certain compilers warning when using pointer
1894 differences as field lengths or precisions in printf-type calls (mostly
1895 affecting debugging statements).
1896
189713. Added optional readline() support for -be (dynamically loaded).
1898
189914. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1900 same clock tick as a message's arrival, so that its received time was the
1901 same as the "first fail" time on the retry record, and that message
1902 remained on the queue past the ultimate address timeout, every queue runner
1903 would try a delivery (because it was past the ultimate address timeout) but
1904 after another failure, the ultimate address timeout, which should have then
1905 bounced the address, did not kick in. This was a "< instead of <=" error;
1906 in most cases the first failure would have been in the next clock tick
1907 after the received time, and all would be well.
1908
190915. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1910 being recognized when the domain list was tested by the match_domain
1911 condition in an expansion string.
1912
191316. Added the ${str2b64: operator.
1914
191517. Exim was always calling setrlimit() to set a large limit for the number of
1916 processes, without checking whether the existing limit was already
1917 adequate. (It did check for the limit on file descriptors.) Furthermore,
1918 errors from getrlimit() and setrlimit() were being ignored. Now they are
1919 logged to the main and panic logs, but Exim does carry on, to try to do its
1920 job under whatever limits there are.
1921
192218. Imported PCRE 5.0.
1923
192419. Trivial typo in log message " temporarily refused connection" (the leading
1925 space).
1926
192720. If the log selector return_path_on_delivery was set and an address was
1928 redirected to /dev/null, the delivery process crashed because it assumed
1929 that a return path would always be set for a "successful" delivery. In this
1930 case, the whole delivery is bypassed as an optimization, and therefore no
1931 return path is set.
1932
193321. Internal re-arrangement: the function for sending a challenge and reading
1934 a response while authentication was assuming a zero-terminated challenge
1935 string. It's now changed to take a pointer and a length, to allow for
1936 binary data in such strings.
1937
193822. Added the cyrus_sasl authenticator (code supplied by MBM).
1939
194023. Exim was not respecting finduser_retries when seeking the login of the
1941 uid under which it was called; it was always trying 10 times. (The default
1942 setting of finduser_retries is zero.) Also, it was sleeping after the final
1943 failure, which is pointless.
1944
194524. Implemented tls_on_connect_ports.
1946
194725. Implemented acl_smtp_predata.
1948
194926. If the domain in control=submission is set empty, Exim assumes that the
1950 authenticated id is a complete email address when it generates From: or
1951 Sender: header lines.
1952
195327. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1954 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1955 chown and chgrp in /bin and hostname in /usr/bin.
1956
195728. Exim was keeping the "process log" file open after each use, just as it
1958 does for the main log. This opens the possibility of it remaining open for
1959 long periods when the USR1 signal hits a daemon. Occasional processlog
1960 errors were reported, that could have been caused by this. Anyway, it seems
1961 much more sensible not to leave this file open at all, so that is what now
1962 happens.
1963
196429. The long-running daemon process does not normally write to the log once it
1965 has entered its main loop, and it closes the log before doing so. This is
1966 so that log files can straightforwardly be renamed and moved. However,
1967 there are a couple of unusual error situations where the daemon does write
1968 log entries, and I had neglected to close the log afterwards.
1969
197030. The text of an SMTP error response that was received during a remote
1971 delivery was being truncated at 512 bytes. This is too short for some of
1972 the long messages that one sometimes sees. I've increased the limit to
1973 1024.
1974
197531. It is now possible to make retry rules that apply only when a message has a
1976 specific sender, in particular, an empty sender.
1977
197832. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1979 it possible to be selective about when SMTP synchronization is enforced.
1980
198133. Added "control = caseful_local_part" and "control = "caselower_local_part".
1982
198332. Implemented hosts_connection_nolog.
1984
198533. Added an ACL for QUIT.
1986
198734. Setting "delay_warning=" to disable warnings was not working; it gave a
1988 syntax error.
1989
199035. Added mailbox_size and mailbox_filecount to appendfile.
1991
199236. Added control = no_multiline_responses to ACLs.
1993
199437. There was a bug in the logic of the code that waits for the clock to tick
1995 in the case where the clock went backwards by a substantial amount such
1996 that the microsecond fraction of "now" was more than the microsecond
1997 fraction of "then" (but the whole seconds number was less).
1998
199938. Added support for the libradius Radius client library this is found on
2000 FreeBSD (previously only the radiusclient library was supported).
2001
2002
2003Exim version 4.42
2004-----------------
2005
2006 1. When certain lookups returned multiple values in the form name=value, the
2007 quoting of the values was not always being done properly. Specifically:
2008 (a) If the value started with a double quote, but contained no whitespace,
2009 it was not quoted.
2010 (b) If the value contained whitespace other than a space character (i.e.
2011 tabs or newlines or carriage returns) it was not quoted.
2012 This fix has been applied to the mysql and pgsql lookups by writing a
2013 separate quoting function and calling it from the lookup code. The fix
2014 should probably also be applied to nisplus, ibase and oracle lookups, but
2015 since I cannot test any of those, I have not disturbed their existing code.
2016
2017 2. A hit in the callout cache for a specific address caused a log line with no
2018 reason for rejecting RCPT. Now it says "Previous (cached) callout
2019 verification failure".
2020
2021 3. There was an off-by-one bug in the queryprogram router. An over-long
2022 return line was truncated at 256 instead of 255 characters, thereby
2023 overflowing its buffer with the terminating zero. As well as fixing this, I
2024 have increased the buffer size to 1024 (and made a note to document this).
2025
2026 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2027 when Exim is waiting for an SMTP response from a remote server, Exim
2028 restarts its select() call on the socket, thereby resetting its timeout.
2029 This is not a problem when such interrupts are rare. Somebody set up a cron
2030 job to run exiwhat every 2 minutes, which is less than the normal select()
2031 timeout (5 or 10 minutes). This meant that the select() timeout never
2032 kicked in because it was always reset. I have fixed this by comparing the
2033 time when an interrupt arrives with the time at the start of the first call
2034 to select(). If more time than the timeout has elapsed, the interrupt is
2035 treated as a timeout.
2036
2037 5. Some internal re-factoring in preparation for the addition of Sieve
2038 extensions (by MH). In particular, the "personal" test is moved to a
2039 separate function, and given an option for scanning Cc: and Bcc: (which is
2040 not set for Exim filters).
2041
2042 6. When Exim created an email address using the login of the caller as the
2043 local part (e.g. when creating a From: or Sender: header line), it was not
2044 quoting the local part when it contained special characters such as @.
2045
2046 7. Installed new OpenBSD configuration files.
2047
2048 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2049 try to make them clearer.
2050
2051 9. Callout options, other than the timeout value, were being ignored when
2052 verifying sender addresses in header lines. For example, when using
2053
2054 verify = header_sender/callout=no_cache
2055
2056 the cache was (incorrectly) being used.
2057
205810. Added a missing instance of ${EXE} to the exim_install script; this affects
2059 only the Cygwin environment.
2060
206111. When return_path_on_delivery was set as a log selector, if different remote
2062 addresses in the same message used different return paths and parallel
2063 remote delivery occurred, the wrong values would sometimes be logged.
2064 (Whenever a remote delivery process finished, the return path value from
2065 the most recently started remote delivery process was logged.)
2066
206712. RFC 3848 specifies standard names for the "with" phrase in Received: header
2068 lines when AUTH and/or TLS are in use. This is the "received protocol"
2069 field. Exim used to use "asmtp" for authenticated SMTP, without any
2070 indication (in the protocol name) for TLS use. Now it follows the RFC and
2071 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2072 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2073 names appear in log lines as well as in Received: header lines.
2074
207513. Installed MH's patches for Sieve to add the "copy" and "vacation"
2076 extensions, and comparison tests, and to fix some bugs.
2077
207814. Changes to the "personal" filter test:
2079
2080 (1) The test was buggy in that it was just doing the equivalent of
2081 "contains" tests on header lines. For example, if a user's address was
2082 anne@some.where, the "personal" test would incorrectly be true for
2083
2084 To: susanne@some.where
2085
2086 This test is now done by extracting each address from the header in turn,
2087 and checking the entire address. Other tests that are part of "personal"
2088 are now done using regular expressions (for example, to check local parts
2089 of addresses in From: header lines).
2090
2091 (2) The list of non-personal local parts in From: addresses has been
2092 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2093 taken from the Sieve specification recommendations.
2094
2095 (3) If the message contains any header line starting with "List-" it is
2096 treated as non-personal.
2097
2098 (4) The test for "circular" in the Subject: header line has been removed
2099 because it now seems ill-conceived.
2100
210115. Minor typos in src/EDITME comments corrected.
2102
210316. Installed latest exipick from John Jetmore.
2104
210517. If headers_add on a router specified a text string that was too long for
2106 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2107 of string_sprintf() is now avoided.
2108
210918. $message_body_size was not set (it was always zero) when running the DATA
2110 ACL and the local_scan() function.
2111
211219. For the "mail" command in an Exim filter, no default was being set for
2113 the once_repeat time, causing a random time value to be used if "once" was
2114 specified. (If the value happened to be <= 0, no repeat happened.) The
2115 default is now 0s, meaning "never repeat". The "vacation" command was OK
2116 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2117 (I found it when inspecting the code).
2118
211920. There is now an overall timeout for performing a callout verification. It
2120 defaults to 4 times the callout timeout, which applies to individual SMTP
2121 commands during the callout. The overall timeout applies when there is more
2122 than one host that can be tried. The timeout is checked before trying the
2123 next host. This prevents very long delays if there are a large number of
2124 hosts and all are timing out (e.g. when the network connections are timing
2125 out). The value of the overall timeout can be changed by specifying an
2126 additional sub-option for "callout", called "maxwait". For example:
2127
2128 verify = sender/callout=5s,maxwait=20s
2129
213021. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2131 to the end before writing, but this should make it even safer).
2132
213322. Exim was forgetting that it had advertised PIPELINING for the second and
2134 subsequent messages on an SMTP connection. It was also not resetting its
2135 memory on STARTTLS and an internal HELO.
2136
213723. When Exim logs an SMTP synchronization error within a session, it now
2138 records whether PIPELINING has been advertised or not.
2139
214024. Added 3 instances of "(long int)" casts to time_t variables that were being
2141 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2142 rather than long int.
2143
214425. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2145
214626. Added the never_mail option to autoreply.
2147
2148
2149Exim version 4.41
2150-----------------
2151
2152 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2153 crash if the getsockname() call failed; this can happen if a connection is
2154 closed very soon after it is established. The problem was simply in the
2155 order in which certain operations were done, causing Exim to try to write
2156 to the SMTP stream before it had set up the file descriptor. The bug has
2157 been fixed by making things happen in the correct order.
2158
2159
2160Exim version 4.40
2161-----------------
2162
2163 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2164 before the connection was closed, thus losing the rejection response.
2165
2166 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2167 some early Solaris releases, but causes trouble in current releases where
2168 socklen_t is defined.
2169
2170 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2171 always exist.
2172
2173 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2174 configured.
2175
2176 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2177 that releasing the top of it at the end releases what was used for sub-
2178 expansions (unless the block got too big). However, discard this block if
2179 the first thing is a variable or header, so that we can use its block when
2180 it is dynamic (useful for very large $message_headers, for example).
2181
2182 6. Lookups now cache *every* query, not just the most recent. A new, separate
2183 store pool is used for this. It can be recovered when all lookup caches are
2184 flushed. Lookups now release memory at the end of their result strings.
2185 This has involved some general refactoring of the lookup sources.
2186
2187 7. Some code has been added to the store_xxx() functions to reduce the amount
2188 of flapping under certain conditions.
2189
2190 8. log_incoming_interface used to affect only the <= reception log lines. Now
2191 it causes the local interface and port to be added to several more SMTP log
2192 lines, for example "SMTP connection from", and rejection lines.
2193
2194 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2195
219610. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2197
219811. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2199 could be overwritten at the end of the current message (or the start of a
2200 new message if it was set in a HELO ACL). The value is now preserved for
2201 the duration of the SMTP connection.
2202
220312. If a transport had a headers_rewrite setting, and a matching header line
2204 contained an unqualified address, that address was qualified, even if it
2205 did not match any rewriting rules. The underlying bug was that the values
2206 of the flags that permit the existence of unqualified sender and recipient
2207 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2208 non-local messages, and by -bnq for local messages) were not being
2209 preserved with the message after it was received.
2210
221113. When Exim was logging an SMTP synchronization error, it could sometimes log
2212 "next input=" as part of the text comprising the host identity instead of
2213 the correct text. The code was using the same buffer for two different
2214 strings. However, depending on which order the printing function evaluated
2215 its arguments, the bug did not always show up. Under Linux, for example, my
2216 test suite worked just fine.
2217
221814. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2219 doesn't work with some older versions of Perl. It has been changed to "my",
2220 which in any case is probably the better facility to use.
2221
222215. A really picky compiler found some instances of statements for creating
2223 error messages that either had too many or two few arguments for the format
2224 string.
2225
222616. The size of the buffer for calls to the DNS resolver has been increased
2227 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2228 for addresses that have a lot of PTR records. This alleviates a problem; it
2229 does not fully solve it.
2230
223117. A dnsdb lookup for PTR records that receives more data than will fit in the
2232 buffer now truncates the list and logs the incident, which is the same
2233 action as happens when Exim is looking up a host name and its aliases.
2234 Previously in this situation something unpredictable would happen;
2235 sometimes it was "internal error: store_reset failed".
2236
223718. If a server dropped the connection unexpectedly when an Exim client was
2238 using GnuTLS and trying to read a response, the client delivery process
2239 crashed while trying to generate an error log message.
2240
224119. If a "warn" verb in an ACL added multiple headers to a message in a single
2242 string, for example:
2243
2244 warn message = H1: something\nH2: something
2245
2246 the text was added as a single header line from Exim's point of view
2247 though it ended up OK in the delivered message. However, searching for the
2248 second and subsequent header lines using $h_h2: did not work. This has been
2249 fixed. Similarly, if a system filter added multiple headers in this way,
2250 the routers could not see them.
2251
225220. Expanded the error message when iplsearch is called with an invalid key to
2253 suggest using net-iplsearch in a host list.
2254
225521. When running tests using -bh, any delays imposed by "delay" modifiers in
2256 ACLs are no longer actually imposed (and a message to that effect is
2257 output).
2258
225922. If a "gecos" field in a passwd entry contained escaped characters, in
2260 particular, if it contained a \" sequence, Exim got it wrong when building
2261 a From: or a Sender: header from that name. A second bug also caused
2262 incorrect handling when an unquoted " was present following a character
2263 that needed quoting.
2264
226523. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2266 was not being matched caselessly.
2267
226824. Arranged for all hyphens in the exim.8 source to be escaped with
2269 backslashes.
2270
227125. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2272 properly. Recipient callout cache records were still being keyed to include
2273 the sender, even when use_sender was set false. This led to far more
2274 callouts that were necessary. The sender is no longer included in the key
2275 when use_sender is false.
2276
227726. Added "control = submission" modifier to ACLs.
2278
227927. Added the ${base62d: operator to decode base 62 numbers.
2280
228128. dnsdb lookups can now access SRV records.
2282
228329. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2284 the configuration file.
2285
228630. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2287 (-v) mode. This makes the output for a verbose queue run more intelligible.
2288
228931. Added a use_postmaster feature to recipient callouts.
2290
229132. Added the $body_zerocount variable, containing the number of binary zero
2292 bytes in the message body.
2293
229433. The time of last modification of the "new" subdirectory is now used as the
2295 "mailbox time last read" when there is a quota error for a maildir
2296 delivery.
2297
229834. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2299
230035. Added +ignore_unknown as a special item in host lists.
2301
230236. Code for decoding IPv6 addresses in host lists is now included, even if
2303 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2304 address was recognized as an IP address, but was then not correctly decoded
2305 into binary, causing unexpected and incorrect effects when compared with
2306 another IP address.
2307
2308
2309Exim version 4.34
2310-----------------
2311
2312 1. Very minor rewording of debugging text in manualroute to say "list of
2313 hosts" instead of "hostlist".
2314
2315 2. If verify=header_syntax was set, and a header line with an unqualified
2316 address (no domain) and a large number of spaces between the end of the
2317 name and the colon was received, the reception process suffered a buffer
2318 overflow, and (when I tested it) crashed. This was caused by some obsolete
2319 code that should have been removed. The fix is to remove it!
2320
2321 3. When running in the test harness, delay a bit after writing a bounce
2322 message to get a bit more predictability in the log output.
2323
2324 4. Added a call to search_tidyup() just before forking a reception process. In
2325 theory, someone could use a lookup in the expansion of smtp_accept_max_
2326 per_host which, without the tidyup, could leave open a database connection.
2327
2328 5. Added the variables $recipient_data and $sender_data which get set from a
2329 lookup success in an ACL "recipients" or "senders" condition, or a router
2330 "senders" option, similar to $domain_data and $local_part_data.
2331
2332 6. Moved the writing of debug_print from before to after the "senders" test
2333 for routers.
2334
2335 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2336 problems for message scanning, either using a data ACL, or using
2337 local_scan() because the Received: header was not generated till after they
2338 were called (in order to set the time as the time of reception completion).
2339 I have revised the way this works. The header is now generated after the
2340 body is received, but before the ACL or local_scan() are called. After they
2341 are run, the timestamp in the header is updated.
2342
2343
2344Exim version 4.33
2345-----------------
2346
2347 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2348 before starting a queue runner without re-exec. This happened only when
2349 deliver_drop_privilege was set or when the Exim user was set to root. The
2350 effect of the bug was that timeouts during subsequent deliveries caused
2351 crashes instead of being properly handled. The handler is now left at its
2352 default (and expected) setting.
2353
2354 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2355 message, again when deliver_drop_privilege is set or Exim is run as root.
2356 The bug described in (1) was not present in this case, but the tidying up
2357 of the other signals was missing. I have made the two cases consistent.
2358
2359 3. The ignore_target_hosts setting on a manualroute router was being ignored
2360 for hosts that were looked up using the /MX notation.
2361
2362 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2363 in domain lists.
2364
2365 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2366 operated on the sender address. After changing the $sender_address to <>
2367 for the sender address verify, Exim was re-instated it as the original
2368 (before rewriting) address, but remembering that it had rewritten it, so it
2369 wasn't rewriting it again. This bug also had the effect of breaking the
2370 sender address verification caching when the sender address was rewritten.
2371
2372 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2373 This has been changed so that if the ip literal address matches
2374 ignore_target_hosts, the router declines.
2375
2376 7. Added expansion conditions match_domain, match_address, and match_local_
2377 part (NOT match_host).
2378
2379 8. The placeholder for the Received: header didn't have a length field set.
2380
2381 9. Added code to Exim itself and to exim_lock to test for a specific race
2382 condition that could lead to file corruption when using MBX delivery. The
2383 issue is with the lockfile that is created in /tmp. If this file is removed
2384 after a process has opened it but before that process has acquired a lock,
2385 there is the potential for a second process to recreate the file and also
2386 acquire a lock. This could lead to two Exim processes writing to the file
2387 at the same time. The added code performs the same test as UW imapd; it
2388 checks after acquiring the lock that its file descriptor still refers to
2389 the same named file.
2390
239110. The buffer for building added header lines was of fixed size, 8192 bytes.
2392 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2393 when Exim is built.
2394
239511. Added the smtp_active_hostname option. If used, this will typically be made
2396 to depend on the incoming interface address. Because $interface_address is
2397 not set up until the daemon has forked a reception process, error responses
2398 that can happen earlier (such as "too many connections") no longer contain
2399 a host name.
2400
240112. If an expansion in a condition on a "warn" statement fails because a lookup
2402 defers, the "warn" statement is abandoned, and the next ACL statement is
2403 processed. Previously this caused the whole ACL to be aborted.
2404
240513. Added the iplsearch lookup type.
2406
240714. Added ident_timeout as a log selector.
2408
240915. Added tls_certificate_verified as a log selector.
2410
241116. Added a global option tls_require_ciphers (compare the smtp transport
2412 option of the same name). This controls incoming TLS connections.
2413
241417. I finally figured out how to make tls_require_ciphers do a similar thing
2415 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2416 before starting the TLS session.
2417
241818. Tabs are now shown as \t in -bP output.
2419
242019. If the log selector return_path_on_delivery was set, Exim crashed when
2421 bouncing a message because it had too many Received: header lines.
2422
242320. If two routers both had headers_remove settings, and the first one included
2424 a superfluous trailing colon, the final name in the first list and the
2425 first name in the second list were incorrectly joined into one item (with a
2426 colon in the middle).
2427
2428
2429Exim version 4.32
2430-----------------
2431
2432 1. Added -C and -D options to the exinext utility, mainly to make it easier
2433 to include in the automated testing, but these could be helpful when
2434 multiple configurations are in use.
2435
2436 2. The exinext utility was not formatting the output nicely when there was
2437 an alternate port involved in the retry record key, nor when there was a
2438 message id as well (for retries that were specific to a specific message
2439 and a specific host). It was also confused by IPv6 addresses, because of
2440 the additional colons they contain. I have fixed the IPv4 problem, and
2441 patched it up to do a reasonable job for IPv6.
2442
2443 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2444 delivery, the log line now contains "pipelined" if PIPELINING was used.
2445
2446 4. An SMTP transport process used to panic and die if the bind() call to set
2447 an explicit outgoing interface failed. This has been changed; it is now
2448 treated in the same way as a connect() failure.
2449
2450 5. A reference to $sender_host_name in the part of a conditional expansion
2451 that was being skipped was still causing a DNS lookup. This no longer
2452 occurs.
2453
2454 6. The def: expansion condition was not recognizing references to header lines
2455 that used bh_ and bheader_.
2456
2457 7. Added the _cache feature to named lists.
2458
2459 8. The code for checking quota_filecount in the appendfile transport was
2460 allowing one more file than it should have been.
2461
2462 9. For compatibility with Sendmail, the command line option
2463
2464 -prval:sval
2465
2466 is equivalent to
2467
2468 -oMr rval -oMs sval
2469
2470 and sets the incoming protocol and host name (for trusted callers). The
2471 host name and its colon can be omitted when only the protocol is to be set.
2472 Note the Exim already has two private options, -pd and -ps, that refer to
2473 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2474 "s", but I don't think that's a major issue.
2475
247610. A number of refactoring changes to the code, none of which should affect
2477 Exim's behaviour:
2478
2479 (a) The number of logging options was getting close to filling up the
2480 32-bit word that was used as a bit map. I have split them into two classes:
2481 those that are passed in the argument to log_write(), and those that are
2482 only ever tested independently outside of that function. These are now in
2483 separate 32-bit words, so there is plenty of room for expansion again.
2484 There is no change in the user interface or the logging behaviour.
2485
2486 (b) When building, for example, log lines, the code previously used a
2487 macro that called string_cat() twice, in order to add two strings. This is
2488 not really sufficiently general. Furthermore, there was one instance where
2489 it was actually wrong because one of the argument was used twice, and in
2490 one call a function was used. (As it happened, calling the function twice
2491 did not affect the overall behaviour.) The macro has been replaced by a
2492 function that can join an arbitrary number of extra strings onto a growing
2493 string.
2494
2495 (c) The code for expansion conditions now uses a table and a binary chop
2496 instead of a serial search (which was left over from when there were very
2497 few conditions). Also, it now recognizes conditions like "pam" even when
2498 the relevant support is not compiled in: a suitably worded error message is
2499 given if an attempt is made to use such a condition.
2500
250111. Added ${time_interval:xxxxx}.
2502
250312. A bug was causing one of the ddress fields not to be passed back correctly
2504 from remote delivery subprocesses. The field in question was not being
2505 subsequently used, so this caused to problems in practice.
2506
250713. Added new log selectors queue_time and deliver_time.
2508
250914. Might have fixed a bug in maildirsizefile handling that threw up
2510 "unexpected character" debug warnings, and recalculated the data
2511 unnecessarily. In any case, I expanded the warning message to give more
2512 information.
2513
251415. Added the message "Restricted characters in address" to the statements in
2515 the default ACL that block characters like @ and % in local parts.
2516
251716. Change 71 for release 4.31 proved to be much less benign that I imagined.
2518 Three changes have been made:
2519
2520 (a) There was a serious bug; a negative response to MAIL caused the whole
2521 recipient domain to be cached as invalid, thereby blocking all messages
2522 to all local parts at the same domain, from all senders. This bug has
2523 been fixed. The domain is no longer cached after a negative response to
2524 MAIL if the sender used is not empty.
2525
2526 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2527 been restored.
2528
2529 (c) A new callout option, "use_sender" has been added for people who want
2530 the modified behaviour.
2531
2532
2533Exim version 4.31
2534-----------------
2535
2536 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2537 Larry Rosenman.
2538
2539 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2540 indeed breaks things for older releases.
2541
2542 3. Added additional logging to the case where there is a problem reading data
2543 from a filter that is running in a subprocess using a pipe, in order to
2544 try to track down a specific problem.
2545
2546 4. Testing facility fudge: when running in the test harness and attempting
2547 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2548 getting "No route to host". Convert this to a timeout.
2549
2550 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2551 warning.
2552
2553 6. Some OS don't have socklen_t but use size_t instead. This affects the
2554 fifth argument of getsockopt() amongst other things. This is now
2555 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2556 can be set for individual OS. I have set it for SunOS5, OSF1, and
2557 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2558 some earlier ones do not.
2559
2560 7. Change 4.30/15 was not doing the test caselessly.
2561
2562 8. The standard form for an IPv6 address literal was being rejected by address
2563 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2564 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2565 this, as well as the form without the "IPv6" on the front (but only when
2566 address literals are enabled, of course).
2567
2568 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2569
257010. Exim crashed if a message with an empty sender address specified by -f
2571 encountered a router with an errors_to setting. This could be provoked only
2572 by a command such as
2573
2574 exim -f "" ...
2575
2576 where an empty string was supplied; "<>" did not hit this bug.
2577
257811. Installed PCRE release 4.5.
2579
258012. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2581 remained set. It is now erased.
2582
258313. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2584 times from message ids (which are base 36 rather than the normal 62).
2585
258614. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2587 were being counted as actual protocol errors, and logged if the log
2588 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2589 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2590 and DATA following a set of rejected RCPTs do not count as protocol errors.
2591 In other words, Exim assumes they were pipelined, though this may not
2592 actually be the case. Of course, in all cases the client gets an
2593 appropriate error code.
2594
259515. If a lookup fails in an ACL condition, a message about the failure may
2596 be available; it is used if testing the ACL cannot continue, because most
2597 such messages specify what the cause of the deferral is. However, some
2598 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2599 that caused an old message to be retained and used if a later statement
2600 caused a defer, replacing the real cause of the deferral.
2601
260216. If an IP address had so many PTR records that the DNS lookup buffer
2603 was not large enough to hold them, Exim could crash while trying to process
2604 the truncated data. It now detects and logs this case.
2605
260617. Further to 4.21/58, another change has been made: if (and only if) the
2607 first line of a message (the first header line) ends with CRLF, a bare LF
2608 in a subsequent header line has a space inserted after it, so as not to
2609 terminate the header.
2610
261118. Refactoring: tidied an ugly bit of code in appendfile that copied data
2612 unnecessarily, used atoi() instead of strtol(), and didn't check the
2613 termination when getting file sizes from file names by regex.
2614
261519. Completely re-implemented the support for maildirsize files, in the light
2616 of a number of problems with the previous contributed implementation
2617 (4.30/29). In particular:
2618
2619 . If the quota is zero, the maildirsize file is maintained, but no quota is
2620 imposed.
2621
2622 . If the maildir directory does not exist, it is created before any attempt
2623 to write a maildirsize file.
2624
2625 . The quota value in the file is just a cache; if the quota is changed in
2626 the transport, the new value overrides.
2627
2628 . A regular expression is available for excluding directories from the
2629 count.
2630
263120. The autoreply transport checks the characters in options that define the
2632 message's headers; it allows continued headers, but it was checking with
2633 isspace() after an embedded newline instead of explicitly looking for a
2634 space or a tab.
2635
263621. If all the "regular" hosts to which an address was routed had passed their
2637 expiry times, and had not reached their retry times, the address was
2638 bounced, even if fallback hosts were defined. Now Exim should go on to try
2639 the fallback hosts.
2640
264122. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2642 equivalent code in the SMTP transport. Some hosts send humungous responses
2643 to HELO/EHLO, more than 1024 it seems.
2644
264523. Refactoring: code in filter.c used (void *) for "any old type" but this
2646 gives compiler warnings in some environments. I've now done it "properly",
2647 using a union.
2648
264924. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2650 (because of problems with the built-in one) was declared to return uschar *
2651 instead of char *, causing compiler failure.
2652
265325. Fixed a file descriptor leak when processing alias/forward files.
2654
265526. Fixed a minor format string issue in dbfn.c.
2656
265727. Typo in exim.c: ("dmbnz" for "dbmnz").
2658
265928. If a filter file refered to $h_xxx or $message_headers, and the headers
2660 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2661 become corrupted.
2662
266329. When a sender address is verified, it is cached, to save repeating the test
2664 when there is more than one recipient in a message. However, when the
2665 verification involves a callout, it is possible for different callout
2666 options to be set for different recipients. It is too complicated to keep
2667 track of this in the cache, so now Exim always runs a verification when a
2668 callout is required, relying on the callout cache for the optimization.
2669 The overhead is duplication of the address routing, but this should not be
2670 too great.
2671
267230. Fixed a bug in callout caching. If a RCPT command caused the sender address
2673 to be verified with callout=postmaster, and the main callout worked but the
2674 postmaster check failed, the verification correctly failed. However, if a
2675 subsequent RCPT command asked for sender verification *without* the
2676 postmaster check, incorrect caching caused this verification also to fail,
2677 incorrectly.
2678
267931. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2680 it was not caching the DNS options (qualify_single, search_parents) that
2681 were used when the lookup failed. A subsequent lookup with different
2682 options therefore always gave the same answer, though there were cases
2683 where it should not have. (Example: a "domains = !$mx_any" option on a
2684 dnslookup router: the "domains" option is always processed without any
2685 widening, but the router might have qualify_single set.) Now Exim uses the
2686 cached value only when the same options are set.
2687
268832. Added John Jetmore's "exipick" utility to the distribution.
2689
269033. GnuTLS: When an attempt to start a TLS session fails for any reason other
2691 than a timeout (e.g. a certificate is required, and is not provided), an
2692 Exim server now closes the connection immediately. Previously it waited for
2693 the client to close - but if the client is SSL, it seems that they each
2694 wait for each other, leading to a delay before one of them times out.
2695
269634: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2697 maintained 0.8.x compatibility because I don't think many are using it, and
2698 it is clearly obsolete.
2699
270035. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2701 transport.
2702
270336. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2704 client certificate was expired. A simple patch fixes this, though I don't
2705 understand the full logic of why the verify callback is called multiple
2706 times.
2707
270837. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2709 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2710 which causes problems with some clients (such as the Certicom SSL Plus
2711 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2712 disables the coutermeasure allowing Eudora to connect."
2713
271438. Exim was not checking that a write() to a log file succeeded. This could
2715 lead to Bad Things if a log got too big, in particular if it hit a file
2716 size limit. Exim now panics and dies if it cannot write to a log file, just
2717 as it does if it cannot open a log file.
2718
271939. Modified OS/Makefile-Linux so that it now contains
2720
2721 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2722
2723 The two -D definitions ensure that Exim is compiled with large file
2724 support, which makes it possible to handle log files that are bigger than
2725 2^31.
2726
272740. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2728 instance) a domain was checked against a named list that involved a lookup,
2729 causing $domain_data to be set, then another domain was checked against the
2730 same list, then the first domain was re-checked, the value of $domain_data
2731 after the final check could be wrong. In particular, if the second check
2732 failed, it could be set empty. This bug probably also applied to
2733 $localpart_data.
2734
273541. The strip_trailing_dot option was not being applied to the address given
2736 with the -f command-line option.
2737
273842. The code for reading a message's header from the spool was incrementing
2739 $received_count, but never initializing it. This meant that the value was
2740 incorrect (doubled) while delivering a message in the same process in which
2741 it was received. In the most common configuration of Exim, this never
2742 happens - a fresh exec is done - but it can happen when
2743 deliver_drop_privilege is set.
2744
274543. When Exim logs an SMTP synchronization error - client data sent too soon -
2746 it now includes up to 150 characters of the unexpected data in the log
2747 line.
2748
274944. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2750 and building data strings. The size of both of these buffers was 10 000
2751 bytes - far larger than anybody would *ever* want, thought I. Needless to
2752 say, somebody hit the limit. I have increased the maximum line length to
2753 20 000 and the maximum data length of concatenated lines to 100 000. I have
2754 also fixed two bugs, because there was no checking on these buffers. Tsk,
2755 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2756 buffer is too small.
2757
275845. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2759 lsearch lookups. Now it does.
2760
276146. When parsing a route_list item in a manualroute router, a fixed-length
2762 buffer was used for the list of hosts. I made this 1024 bytes long,
2763 thinking that nobody would ever have a list of hosts that long. Wrong.
2764 Somebody had a whole pile of complicated expansion conditions, and the
2765 string was silently truncated, leading to an expansion error. It turns out
2766 that it is easier to change to an unlimited length (owing to other changes
2767 that have happened since this code was originally written) than to build
2768 structure for giving a limitation error. The length of the item that
2769 expands into the list of hosts is now unlimited.
2770
277147. The lsearch lookup could not handle data where the length of text line was
2772 more than 4095 characters. Such lines were truncated, leading to shortened
2773 data being returned. It should now handle lines of any length.
2774
277548. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2776 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2777 ACL").
2778
277949. Cosmetic tidy to scripts like exicyclog that are generated by globally
2780 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2781 no longer happens in comment lines. A list of replacements is now placed
2782 at the head of all of the source files, except those whose only change is
2783 to replace PERL_COMMAND in the very first #! line.
2784
278550. Replaced the slow insertion sort in queue.c, for sorting the list of
2786 messages on the queue, with a bottom-up merge sort, using code contributed
2787 by Michael Haardt. This should make operations like -bp somewhat faster on
2788 large queues. It won't affect queue runners, except when queue_run_in_order
2789 is set.
2790
279151. Installed eximstats 1.31 in the distribution.
2792
279352. Added support for SRV lookups to the dnslookup router.
2794
279553. If an ACL referred to $message_body or $message_body_end, the value was not
2796 reset for any messages that followed in the same SMTP session.
2797
279854. The store-handling optimization for building very long strings was not
2799 differentiating between the different store pools. I don't think this
2800 actually made any difference in practice, but I've tidied it.
2801
280255. While running the routers to verify a sender address, $sender_address
2803 was still set to the sender address. This is wrong, because when routing to
2804 send a bounce to the sender, it would be empty. Therefore, I have changed
2805 it so that, while verifying a sender address, $sender_address is set to <>.
2806 (There is no change to what happens when verifying a recipient address.)
2807
280856. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2809 target A or AAAA records (if not already returned) without resetting the
2810 qualify_single or search_parents options of the DNS resolver. These are
2811 inappropriate in this case because the targets of MX and SRV records must
2812 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2813 target that, when qualified, matched something in the local domain. These
2814 two options are now turned off when doing these lookups.
2815
281657. It seems that at least some releases of Reiserfs (which does not have the
2817 concept of a fixed number of inodes) returns zero and not -1 for the
2818 number of available inodes. This interacted badly with check_spool_inodes,
2819 which assumed that -1 was the "no such thing" setting. What I have done is
2820 to check that the total number of inodes is greater than zero before doing
2821 the test of how many are available.
2822
282358. When a "warn" ACL statement has a log_message modifier, the message is
2824 remembered, and not repeated. This is to avoid a lot of repetition when a
2825 message has many recipients that cause the same warning to be written.
2826 Howewer, Exim was preserving the list of already written lines for an
2827 entire SMTP session, which doesn't seem right. The memory is now reset if a
2828 new message is started.
2829
283059. The "rewrite" debugging flag was not showing the result of rewriting in the
2831 debugging output unless log_rewrite was also set.
2832
283360. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2834 of (int)(handle) when we know that handle contains (void *)(-1).
2835
283661. The Exim daemon panic-logs an error return when it closes the incoming
2837 connection. However "connection reset by peer" seems to be common, and
2838 isn't really an error worthy of noting specially, so that particular error
2839 is no long logged.
2840
284162. When Exim is trying to find all the local interfaces, it used to panic and
2842 die if the ioctl to get the interface flags failed. However, it seems that
2843 on at least one OS (Solaris 9) it is possible to have an interface that is
2844 included in the list of interfaces, but for which you get a failure error
2845 for this call. This happens when the interface is not "plumbed" into a
2846 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2847 failure of the "get flags" call assumes that the interface is down.
2848
284963. Added a ${eval10: operator, which assumes all numbers are decimal. This
2850 makes life easier for people who are doing arithmetic on fields extracted
2851 from dates, where you often get leading zeros that should not be
2852 interpreted as octal.
2853
285464. Added qualify_domain to the redirect router, to override the global
2855 setting.
2856
285765. If a pathologically long header line contained very many addresses (the
2858 report of this problem mentioned 10 000) and each of them was rewritten,
2859 Exim could use up a very large amount of memory. (It kept on making new
2860 copies of the header line as it rewrote, and never released the old ones.)
2861 At the expense of a bit more processing, the header rewriting function has
2862 been changed so that it no longer eats memory in this way.
2863
286466. The generation of the Received: header has been moved from the time that a
2865 message starts to be received, to the time that it finishes. The timestamp
2866 in the Received: header should now be very close to that of the <= log
2867 line. There are two side-effects of this change:
2868
2869 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2870 logged header lines no longer include the local Received: line, because
2871 it has not yet been created. The same applies to a copy of the message
2872 that is returned to a non-SMTP sender when a message is rejected.
2873
2874 (b) When a filter file is tested using -bf, no additional Received: header
2875 is added to the test message. After some thought, I decided that this
2876 is a bug fix.
2877
2878 This change does not affect the value of $received_for. It is still set
2879 after address rewriting, but before local_scan() is called.
2880
288167. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2882
288368. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2884 gave an unhelpful panic error message, and a defer error. I have managed to
2885 change this behaviour so that it now rejects any supplied certificate,
2886 which seems right, as the list of acceptable certificates is empty.
2887
288869. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2889 gave an unhelpful defer error. I have not managed to make this reject any
2890 supplied certificates, but the error message it gives is "no certificate
2891 supplied", which is not helpful.
2892
289370. exigrep's output now also includes lines that are not associated with any
2894 message, but which match the given pattern. Implemented by a patch from
2895 Martin Sluka, which also tidied up the Perl a bit.
2896
289771. Recipient callout verification, like sender verification, was using <> in
2898 the MAIL FROM command. This isn't really the right thing, since the actual
2899 sender may affect whether the remote host accepts the recipient or not. I
2900 have changed it to use the actual sender in the callout; this means that
2901 the cache record is now keyed on a recipient/sender pair, not just the
2902 recipient address. There doesn't seem to be a real danger of callout loops,
2903 since a callout by the remote host to check the sender would use <>.
2904 [SEE ABOVE: changed after hitting problems.]
2905
290672. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2907 temporary errors. However, in the case of such a code being given after
2908 the end of a data transmission (i.e. after ".") Exim was failing to write
2909 a retry record for the message. (Yes, there was some broken host that was
2910 actually sending 8xx at this point.)
2911
291273. An unknown lookup type in a host list could cause Exim to panic-die when
2913 the list was checked. (An example that provoked this was putting <; in the
2914 middle of a list instead of at the start.) If this happened during a DATA
2915 ACL check, a -D file could be left lying around. This kind of configuration
2916 error no longer causes Exim to die; instead it causes a defer errror. The
2917 incident is still logged to the main and panic logs.
2918
291974. Buglet left over from Exim 3 conversion. The message "too many messages
2920 in one connection" was written to the rejectlog but not the mainlog, except
2921 when address rewriting (yes!) was being logged.
2922
292375. Added write_rejectlog option.
2924
292576. When a system filter was run not as root (that is, when system_filter_user
2926 was set), the values of the $n variables were not being returned to the
2927 main process; thus, they were not subsequently available in the $sn
2928 variables.
2929
293077. Added +return_path_on_delivery log selector.
2931
293278. A connection timeout was being treated differently from recipients deferred
2933 when testing hosts_max_try with a message that was older than the host's
2934 retry timeout. (The host should not be counted, thus allowing all hosts to
2935 be tried at least once before bouncing.) This may have been the cause of an
2936 occasionally reported bug whereby a message would remain on the queue
2937 longer than the retry timeout, but would be bounced if a delivery was
2938 forced. I say "may" because I never totally pinned down the problem;
2939 setting up timeout/retry tests is difficult. See also the next item.
2940
294179. The ultimate address timeout was not being applied to errors that involved
2942 a combination of host plus message (for example, a timeout on a MAIL
2943 command). When an address resolved to a number of possible hosts, and they
2944 were not all tried for each delivery (e.g. because of hosts_max_try), a
2945 message could remain on the queue longer than the retry timeout.
2946
294780. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2948 Haardt.
2949
295081. Fixed an obscure SMTP outgoing bug which required at least the following
2951 conditions: (a) there was another message waiting for the same server;
2952 (b) the server returned 5xx to all RCPT commands in the first message so
2953 that the message was not completed; (c) the server dropped the connection
2954 or gave a negative response to the RSET that Exim sends to abort the
2955 transaction. The observed case was a dropped connection after DATA that had
2956 been sent in pipelining mode. That is, the server had advertised PIPELINING
2957 but was not implementing it correctly. The effect of the bug was incorrect
2958 behaviour, such as trying another host, and this could lead to a crash.
2959
2960
2961Exim version 4.30
2962-----------------
2963
2964 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2965 and daemon.c were passed as pointers to ints; they should have been
2966 pointers to socklen_t variables (which are typically unsigned ints).
2967
2968 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2969 fixed.
2970
2971 3. Fixed a really odd bug that affected only the testing scheme; patching a
2972 certain fixed string in the binary changed the value of another string that
2973 happened to be identical to the end of the original first string.
2974
2975 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2976 name", it returns that address as the IP address. On some operating
2977 systems (e.g. Solaris), it also passes back the IP address string as the
2978 "host name". However, on others (e.g. Linux), it passes back an empty
2979 string. Exim wasn't checking for this, and was changing the host name to an
2980 empty string, assuming it had been canonicized.
2981
2982 5. Although rare, it is permitted to have more than one PTR record for a given
2983 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2984 all the names associated with an address, because they do in Solaris.
2985 However, it seems that they do not in Linux for data that comes from the
2986 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2987 I found this out when I moved to a new Linux workstation and tried to run
2988 the Exim test suite.
2989
2990 To get round this problem I have changed the code so that it now does its
2991 own call to the DNS to look up PTR records when searching for a host name.
2992 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2993 addresses that are only in /etc/hosts are still found.
2994
2995 This behaviour is, however, controlled by an option called host_lookup_
2996 order, which defaults to "bydns:byaddr". If people want to use the other
2997 order, or indeed, just use one or the other means of lookup, they can
2998 specify it in this variable.
2999
3000 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3001 some operating systems, this comes back from gethostbyaddr() as an empty
3002 string, and this is what Exim used to test for. However, it seems that in
3003 other systems, "." is yielded. Exim now tests for this case too.
3004
3005 7. The values of check_spool_space and check_log_space are now held internally
3006 as a number of kilobytes instead of an absolute number of bytes. If a
3007 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3008 kilobyte. This means that much larger values can be stored.
3009
3010 8. Exim monitor: an attempt to get the action menu when not actually pointing
3011 at a message produces an empty menu entitled "No message selected". This
3012 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3013 no entries in it ("Shell widget menu has zero width and/or height"). So I
3014 have added a single, blank menu entry in this case.
3015
3016 9. Added ${quote_local_part.
3017
301810. MIME decoding is now applied to the contents of Subject: header lines when
3019 they are logged.
3020
302111. Now that a reference to $sender_host_address automatically causes a reverse
3022 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3023 host lookup before query-style lookups in lists that might use this
3024 variable. This has therefore been abolished, and the "net-" prefix is no
3025 longer necessary for query-style lookups.
3026
302712. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3028 have been a typo for LFLAGS, so it has been changed.
3029
303013. The install script calls Exim with "-C /dev/null" in order to find the
3031 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3032 to be output. Howeve, since Exim outputs its version number before the
3033 error, it didn't break the script. It just looked ugly. I fixed this by
3034 always allowing "-C /dev/null" if the caller is root.
3035
303614. Ignore overlarge ACL variable number when reading spool file - insurance
3037 against a later release with more variables having written the file.
3038
303915. The standard form for an IPv6 address literal was being rejected by EHLO.
3040 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3041 this, as well as the form without the "IPv6" on the front.
3042
304316. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3044 OS/Makefile-Darwin file.
3045
304617. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3047 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3048
304918. After change 4.21/52, "%ld" was used to format the contents of the $inode
3050 variable. However, some OS use ints for inodes. I've added cast to long int
3051 to get rid of the compiler warning.
3052
305319. I had forgotten to lock out "/../" in configuration file names when
3054 ALT_CONFIG_PREFIX was set.
3055
305620. Routers used for verification do not need to specify transports. However,
3057 if such a router generated a host list, and callout was configured, Exim
3058 crashed, because it could not find a port number from the (non-existent)
3059 transport. It now assumes port 25 in this circumstance.
3060
306121. Added the -t option to exigrep.
3062
306322. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3064 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3065 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3066 them is set, LOOKUP_LSEARCH is forced.
3067
306823. "exim -bV" now outputs a list of lookups that are included in the binary.
3069
307024. Added sender and host information to the "rejected by local_scan()" log
3071 line; previously there was no indication of these.
3072
307325. Added .include_if_exists.
3074
307526. Change 3.952/11 added an explicit directory sync on top of a file sync for
3076 Linux. It turns out that not all file systems support this. Apparently some
3077 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3078 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3079 not supported on the file descriptor, is now ignored when Exim is trying to
3080 sync a directory. This applies only to Linux.
3081
308227. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3083
308428. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3085 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3086 this.
3087
308829. Added support for maildirsize files from supplied patch (modified a bit).
3089
309030. The use of :fail: followed by an empty string could lead Exim to respond to
3091 sender verification failures with (e.g.):
3092
3093 550 Verification failed for <xxx>
3094 550 Sender verify failed
3095
3096 where the first response line was missing the '-' that indicates it is not
3097 the final line of the response.
3098
309931. The loop for finding the name of the user that called Exim had a hardwired
3100 limit of 10; it now uses the value of finduser_retries, which is used for
3101 all other user lookups.
3102
310332. Added $received_count variable, available in data and not_smtp ACLs, and at
3104 delivery time.
3105
310633. Exim was neglecting to zero errno before one call of strtol() when
3107 expanding a string and expecting an integer value. On some systems this
3108 resulted in spurious "integer overflow" errors. Also, it was casting the
3109 result into an int without checking.
3110
311134. Testing for a connection timeout using "timeout_connect" in the retry rules
3112 did not work. The code looks as if it has *never* worked, though it appears
3113 to have been documented since at least releast 1.62. I have made it work.
3114
311535. The "timeout_DNS" error in retry rules, also documented since at least
3116 1.62, also never worked. As it isn't clear exactly what this means, and
3117 clearly it isn't a major issue, I have abolished the feature by treating it
3118 as "timeout", and writing a warning to the main and panic logs.
3119
312036. The display of retry rules for -brt wasn't always showing the error code
3121 correctly.
3122
312337. Added new error conditions to retry rules: timeout_A, timeout_MX,
3124 timeout_connect_A, timeout_connect_MX.
3125
312638. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3127 to the empty sender.
3128
312939. The daemon was not analysing the content of -oX till after it had closed
3130 stderr and disconnected from the controlling terminal. This meant that any
3131 syntax errors were only noted on the panic log, and the return code from
3132 the command was 0. By re-arranging the code a little, I've made the
3133 decoding happen first, so such errors now appear on stderr, and the return
3134 code is 1. However, the actual setting up of the sockets still happens in
3135 the disconnected process, so errors there are still only recorded on the
3136 panic log.
3137
313840. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3139 connections (as happens on some IP stacks) was logged at start up time as
3140 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3141 it from "IPv6 and IPv4", which means that two separate sockets are being
3142 used.
3143
314441. The debug output for gethostbyname2() or getipnodebyname() failures now
3145 says whether AF_INET or AF_INET6 was passed as an argument.
3146
314742. Exiwhat output was messed up when time zones were included in log
3148 timestamps.
3149
315043. Exiwhat now gives more information about the daemon's listening ports,
3151 and whether -tls-on-connect was used.
3152
315344. The "port" option of the smtp transport is now expanded.
3154
315545. A "message" modifier in a "warn" statement in a non-message ACL was being
3156 silently ignored. Now an error message is written to the main and panic
3157 logs.
3158
315946. There's a new ACL modifier called "logwrite" which writes to a log file
3160 as soon as it is encountered.
3161
316247. Added $local_user_uid and $local_user_gid at routing time.
3163
316448. Exim crashed when trying to verify a sender address that was being
3165 rewritten to "<>".
3166
316749. Exim was recognizing only a space character after ".include". It now also
3168 recognizes a tab character.
3169
317050. Fixed several bugs in the Perl script that creates the exim.8 man page by
3171 extracting the relevant information from the specification. The man page no
3172 longer contains scrambled data for the -d option, and I've added a section
3173 at the front about calling Exim under different names.
3174
317551. Added "extra_headers" argument to the "mail" command in filter files.
3176
317752. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3178 crash.
3179
318053. Installed eximstats 1.29.
3181
318254. Added transport_filter_timeout as a generic transport option.
3183
318455. Exim no longer adds an empty Bcc: header to messages that have no To: or
3185 Cc: header lines. This was required by RFC 822, but it not required by RFC
3186 2822.
3187
318856. Exim used to add From:, Date:, and Message-Id: header lines to any
3189 incoming messages that did not have them. Now it does so only if the
3190 message originates locally, that is, if there is no associated remote host
3191 address. When Resent- header lines are present, this applies to the Resent-
3192 lines rather than the non-Resent- lines.
3193
319457. Drop incoming SMTP connection after too many syntax or protocol errors. The
3195 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3196
319758. Messages for configuration errors now include the name of the main
3198 configuration file - useful now that there may be more than one file in a
3199 list (.included file names were always shown).
3200
320159. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3202 for those rare installations that do not start the daemon as root or run it
3203 setuid root. I've cut out the call to initgroups() if the daemon is not
3204 root at that time.
3205
320660. The Exim user and group can now be bound into the binary as text strings
3207 that are looked up at the start of Exim's processing.
3208
320961. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3210
321162. Added $mailstore_basename variable.
3212
321363. Installed patch to sieve.c from Michael Haardt.
3214
321564. When Exim failed to open the panic log after failing to open the main log,
3216 the original message it was trying to log was written to stderr and debug
3217 output, but if they were not available (the usual case in production), it
3218 was lost. Now it is written to syslog before the two lines that record the
3219 failures to open the logs.
3220
322165. Users' Exim filters run in subprocesses under the user's uid. It is
3222 possible for a "deliver" command or an alias in a "personal" command to
3223 provoke an address rewrite. If logging of address rewriting is configured,
3224 this fails because the process is not running as root or exim. There may be
3225 a better way of dealing with this, but for the moment (because 4.30 needs
3226 to be released), I have disabled address rewrite logging when running a
3227 filter in a non-root, non-exim process.
3228
3229
3230Exim version 4.24
3231-----------------
3232
3233 1. The buildconfig auxiliary program wasn't quoting the value set for
3234 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3235 not defined. This bug was masked in 4.22 by the effect that was fixed in
3236 change 4.23/1.
3237
3238 2. Some messages that were rejected after a message id was allocated were
3239 shown as "incomplete" by exigrep. It no longer does this for messages that
3240 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3241
3242 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3243 have allow_domain_literals set, the ID did not get logged in the <= line.
3244 Domain literals are now always recognized in Message-ID: header lines.
3245
3246 4. The first argument for a ${extract expansion item is the key name or field
3247 number. Leading and trailing spaces in this item were not being ignored,
3248 causing some misleading effects.
3249
3250 5. When deliver_drop_privilege was set, single queue runner processes started
3251 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3252 same command in the process it spins off) were not dropping privilege.
3253
3254 6. When the daemon running as "exim" started a queue runner, it always
3255 re-executed Exim in the spun-off process. This is a waste of effort when
3256 deliver_drop_privilege is set. The new process now just calls the
3257 queue-runner function directly.
3258
3259
3260Exim version 4.23
3261-----------------
3262
3263 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3264 HEADERS_CHARSET.
3265
3266 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3267 ignored. Though the use of -oP was forcing the writing of a pid file, it
3268 was always written to the default place.
3269
3270 3. If the message "no IP address found for host xxxx" is generated during
3271 incoming verification, it is now followed by identification of the incoming
3272 connection (so you can more easily find what provoked it).
3273
3274 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3275
3276 5. Added some features to "harden" Exim a bit more against certain attacks:
3277
3278 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3279 be put in Local/Makefile. This is like the never_users runtime option,
3280 but it cannot be overridden. The default setting is "root".
3281
3282 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3283 prefix string with which any file named in a -C command line option
3284 must start.
3285
3286 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3287 is retained for -C and -D only if the caller of Exim is root. Without
3288 it, the exim user may also use -C and -D and retain privilege.
3289
3290 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3291 command line option is disabled.
3292
3293 6. Macro names set by the -D option must start with an upper case letter, just
3294 like macro names defined in the configuration file.
3295
3296 7. Added "dereference=" facility to LDAP.
3297
3298 8. Two instances of the typo "uknown" in the source files are fixed.
3299
3300 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3301 the Configure-Makefile script screwed up while processing it.
3302
330310. Incorporated PCRE 4.4.
3304
330511. The SMTP synchronization check was not operating right at the start of an
3306 SMTP session. For example, it could not catch a HELO sent before the client
3307 waited for the greeting. There is now a check for outstanding input at the
3308 point when the greeting is written. Because of the duplex, asynchronous
3309 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3310 way, but not yet received, when the check is performed.
3311
331212. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3313 on TCP/IP sockets, because this apparently causes some broken clients to
3314 timeout.
3315
331613. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3317 unchanged) from the Cygwin maintainer.
3318
331914. The code for -bV that shows what is in the binary showed "mbx" when maildir
3320 was supported instead of testing for mbx. Effectively a typo.
3321
332215. The spa authenticator server code was not checking that the input it
3323 received was valid base64.
3324
332516. The debug output line for the "set" modifier in ACLs was not showing the
3326 name of the variable that was being set.
3327
332817. Code tidy: the variable type "vtype_string" was never used. Removed it.
3329
333018. Previously, a reference to $sender_host_name did not cause a DNS reverse
3331 lookup on its own. Something else was needed to trigger the lookup. For
3332 example, a match in host_lookup or the need for a host name in a host list.
3333 Now, if $sender_host_name is referenced and the host name has not yet been
3334 looked up, a lookup is performed. If the lookup fails, the variable remains
3335 empty, and $host_lookup_failed is set to "1".
3336
333719. Added "eqi" as a case-independent comparison operator.
3338
333920. The saslauthd authentication condition could segfault if neither service
3340 nor realm was specified.
3341
334221. If an overflowing value such as "2048M" was set for message_size_limit, the
3343 error message that was logged was misleading, and incoming SMTP
3344 connections were dropped. The message is now more accurate, and temporary
3345 errors are given to SMTP connections.
3346
334722. In some error situations (such as 21 above) Exim rejects all SMTP commands
3348 (except RSET) with a 421 error, until QUIT is received. However, it was
3349 failing to send a response to QUIT.
3350
335123. The HELO ACL was being run before the code for helo_try_verify_hosts,
3352 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3353 ACL is now run after the helo_try_verify_hosts code.
3354
335524. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3356 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3357 case-independent, so other case variants are also recognized). Apparently
3358 some systems use these upper case variants.
3359
336025. If more than two messages were waiting for the same host, and a transport
3361 filter was specified for the transport, Exim sent two messages over the
3362 same TCP/IP connection, and then failed with "socket operation on non-
3363 socket" when it tried to send the third.
3364
336526. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3366
336727. The extern definition of crypt16() in expand.c was not being excluded when
3368 the OS had its own crypt16() function.
3369
337028. Added bounce_return_body as a new option, and bounce_return_size_limit
3371 as a preferred synonym for return_size_limit, both as an option and as an
3372 expansion variable.
3373
337429. Added LIBS=-liconv to OS/Makefile-OSF1.
3375
337630. Changed the default configuration ACL to relax the local part checking rule
3377 for addresses that are not in any local domains. For these addresses,
3378 slashes and pipe symbols are allowed within local parts, but the sequence
3379 /../ is explicitly forbidden.
3380
338131. SPA server authentication was not clearing the challenge buffer before
3382 using it.
3383
338432. log_message in a "warn" ACL statement was writing to the reject log as
3385 well as to the main log, which contradicts the documentation and doesn't
3386 seem right (because no rejection is happening). So I have stopped it.
3387
338833. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3389 However, I am unable to do any testing of this.
3390
339134. Fixed an infelicity in the appendfile transport. When checking directories
3392 for a mailbox, to see if any needed to be created, it was accidentally
3393 using path names with one or more superfluous leading slashes; tracing
3394 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3395
339635. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3397 contents are added to the log line that is written for every discarded
3398 recipient. (Previously a log_message setting was ignored.)
3399
340036. The ${quote: operator now quotes the string if it is empty.
3401
340237. The install script runs exim in order to find its version number. If for
3403 some reason other than non-existence or emptiness, which it checks, it
3404 could not run './exim', it was installing it with an empty version number,
3405 i.e. as "exim-". This error state is now caught, and the installation is
3406 aborted.
3407
340838. An argument was missing from the function that creates an error message
3409 when Exim fails to connect to the socket for saslauthd authentication.
3410 This could cause Exim to crash, or give a corrupted message.
3411
341239. Added isip, isip4, and isip6 to ${if conditions.
3413
341440. The ACL variables $acl_xx are now saved with the message, and can be
3415 accessed later in routers, transports, and filters.
3416
341741. The new lookup type nwildlsearch is like wildlsearch, except that the key
3418 strings in the file are not string-expanded.
3419
342042. If a MAIL command specified a SIZE value that was too large to fit into an
3421 int variable, the check against message_size_limit failed. Such values are
3422 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3423 day this will have to be increased, but I don't think I want to be around
3424 when emails are that large.
3425
3426
3427
3428Exim version 4.22
3429-----------------
3430
3431 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3432 iconv() is not standard in FreeBSD.
3433
3434 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3435 IPv6 enabled. The observed symptom was a segmentation fault on return from
3436 the function os_common_find_running_interfaces() in src/os.c.
3437
3438 3. In the check_special_case() function in daemon.c I had used "errno" as an
3439 argument name, which causes warnings on some systems. This was basically a
3440 typo, since it was named "eno" in the comments!
3441
3442 4. The code that waits for the clock to tick (at a resolution of some fraction
3443 of a second) so as to ensure message-id uniqueness was always waiting for
3444 at least one whole tick, when it could have waited for less. [This is
3445 almost certainly not relevant at current processor speeds, where it is
3446 unlikely to ever wait at all. But we try to future-proof.]
3447
3448 5. The function that sleeps for a time interval that includes fractions of a
3449 second contained a race. It did not block SIGALRM between setting the
3450 timer, and suspending (a couple of lines later). If the interval was short
3451 and the sigsuspend() was delayed until after it had expired, the suspension
3452 never ended. On busy systems this could lead to processes getting stuck for
3453 ever.
3454
3455 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3456 process, before it forks any delivery processes. The open lookup caching
3457 mechanism meant that the open file or database connection was passed into
3458 the delivery process. The problem was that delivery processes always tidy
3459 up cached lookup data. This could cause a problem for the next delivery
3460 process started by the queue runner, because the external queue runner
3461 process does not know about the closure. So the next delivery process
3462 still has data in the lookup cache. In the case of a file lookup, there was
3463 no problem because closing a file descriptor in a subprocess doesn't affect
3464 the parent. However, if the lookup was caching a connection to a database,
3465 the connection was closed, and the second delivery process was likely to
3466 see errors such as "PGSQL: query failed: server closed the connection
3467 unexpectedly". The problem has been fixed by closing all cached lookups
3468 in a queue runner before running a delivery process.
3469
3470 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3471 seem to have the "const" qualifier which it has on other OS. I've
3472 parameterised it.
3473
3474 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3475 *of the same type* (client or server) with the same public name that an
3476 error should be diagnosed.
3477
3478 9. When Exim looked up a host name for an IP address, but failed to find the
3479 original IP address when looking up the host name (a safety check), it
3480 output the message "<ip address> does not match any IP for NULL", which was
3481 confusing, to say the least. The bug was that the host name should have
3482 appeared instead of "NULL".
3483
348410. Since release 3.03, if Exim is called by a uid other than root or the Exim
3485 user that is built into the binary, and the -C or -D options is used, root
3486 privilege is dropped before the configuration file is read. In addition,
3487 logging is switched to stderr instead of the normal log files. If the
3488 configuration then re-defines the Exim user, the unprivileged environment
3489 is probably not what is expected, so Exim logs a panic warning message (but
3490 proceeds).
3491
3492 However, if deliver_drop_privilege is set, the unprivileged state may well
3493 be exactly what is intended, so the warning has been cut out in that case,
3494 and Exim is allowed to try to write to its normal log files.
3495
3496
3497Exim version 4.21
3498-----------------
3499
3500 1. smtp_return_error_details was not giving details for temporary sender
3501 or receiver verification errors.
3502
3503 2. Diagnose a configuration error if two authenticators have the same public
3504 name.
3505
3506 3. Exim used not to create the message log file for a message until the first
3507 delivery attempt. This could be confusing when incoming messages were held
3508 for policy or load reasons. The message log file is now created at the time
3509 the message is received, and an initial "Received" line is written to it.
3510
3511 4. The automatically generated man page for command line options had a minor
3512 bug that caused no ill effects; however, a more serious problem was that
3513 the procedure for building the man page automatically didn't always
3514 operate. Consequently, release 4.20 contains an out-of-date version. This
3515 shouldn't happen again.
3516
3517 5. When building Exim with embedded Perl support, the script that builds the
3518 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3519 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3520
3521 6. The freeze_tell option was not being used for messages that were frozen on
3522 arrival, either by an ACL or by local_scan().
3523
3524 7. Added the smtp_incomplete_transaction log selector.
3525
3526 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3527 was accepting AUTH without a new EHLO.
3528
3529 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3530 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3531 RFC.
3532
353310. Logging of TCP/IP connections (when configured) now happens in the main
3534 daemon process instead of the child process, so that the TCP/IP connection
3535 count is more accurate (but it can never be perfect).
3536
353711. The use of "drop" in a nested ACL was not being handled correctly in the
3538 outer ACL. Now, if condition failure induced by the nested "drop" causes
3539 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3540 or "require"), the connection is dropped.
3541
354212. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3543 that yield "discard" can now be used with an "accept" or a "discard" verb,
3544 but an error is generated for any others (because I can't see a useful way
3545 to define what should happen).
3546
354713. When an ACL is read dynamically from a file (or anywhere else), the lines
3548 are now processed in the same way as lines in the Exim configuration file.
3549 In particular, continuation lines are supported.
3550
355114. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3552
355315. Added -ti meaning -t -i.
3554
355516. Check for letters, digits, hyphens, and dots in the names of dnslist
3556 domains, and warn by logging if others are found.
3557
355817. At least on BSD, alignment is not guarenteed for the array of ifreq's
3559 returned from GIFCONF when Exim is trying to find the list of interfaces on
3560 a host. The code in os.c has been modified to copy each ifreq to an aligned
3561 structure in all cases.
3562
3563 Also, in some cases, the returned ifreq's were being copied to a 'struct
3564 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3565 means the last couple of bytes of an IPv6 address could be chopped if the
3566 ifreq contained only a normal sockaddr (14 bytes storage).
3567
356818. Named domain lists were not supported in the hosts_treat_as_local option.
3569 An entry such as +xxxx was not recognized, and was treated as a literal
3570 domain name.
3571
357219. Ensure that header lines added by a DATA ACL are included in the reject log
3573 if the ACL subsequently rejects the message.
3574
357520. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3576 MD5 (which is deprecated).
3577
357821. When testing a filter file using -bf, Exim was writing a message when it
3579 took the sender from a "From " line in the message, but it was not doing so
3580 when it took $return_path from a Return-Path: header line. It now does.
3581
358222. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3583 with a valid header line field name (a series of printing characters
3584 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3585
358623. Changed "disc" in the source to "disk" to conform to the documentation and
3587 the book and for uniformity.
3588
358924. Ignore Sendmail's -Ooption=value command line item.
3590
359125. When execve() failed while trying to run a command in a pipe transport,
3592 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3593 could be confused with a return value of 69 from the command itself. This
3594 has been changed to 127, the value the shell returns if it is asked to run
3595 a non-existent command. The wording for the related log line suggests a
3596 non-existent command as the problem.
3597
359826. If received_header_text expands to an empty string, do not add a Received:
3599 header line to the message. (Well, it adds a token one on the spool, but
3600 marks it "old" so that it doesn't get used or transmitted.)
3601
360227. Installed eximstats 1.28 (addition of -nt option).
3603
360428. There was no check for failure on the call to getsockname() in the daemon
3605 code. This can fail if there is a shortage of resources on the system, with
3606 ENOMEM, for example. A temporary error is now given on failure.
3607
360829. Contrary to the C standard, it seems that in some environments, the
3609 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3610 program. Exim now does this explicitly; it affects the formatting of
3611 timestamps using strftime().
3612
361330. If exiqsumm was given junk data, it threw up some uninitialized variable
3614 complaints. I've now initialized all the variables, to avoid this.
3615
361632. Header lines added by a system filter were not being "seen" during
3617 transport-time rewrites.
3618
361933. The info_callback() function passed to OpenSSL is set up with type void
3620 (*)(SSL *, int, int), as described somewhere. However, when calling the
3621 function (actually a macro) that sets it up, the type void(*)() is
3622 expected. I've put in a cast to prevent warnings from picky compilers.
3623
362434. If a DNS black list lookup found a CNAME record, but there were no A
3625 records associated with the domain it pointed at, Exim crashed.
3626
362735. If a DNS black list lookup returned more than one A record, Exim ignored
3628 all but the first. It now scans all returned addresses if a particular IP
3629 value is being sought. In this situation, the contents of the
3630 $dnslist_value variable are a list of all the addresses, separated by a
3631 comma and a space.
3632
363336. Tightened up the rules for host name lookups using reverse DNS. Exim used
3634 to accept a host name and all its aliases if the forward lookup for any of
3635 them yielded the IP address of the incoming connection. Now it accepts only
3636 those names whose forward lookup yields the correct IP address. Any other
3637 names are discarded. This closes a loophole whereby a rogue DNS
3638 administrator could create reverse DNS records to break through a
3639 wildcarded host restriction in an ACL.
3640
364137. If a user filter or a system filter that ran in a subprocess used any of
3642 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3643 the wrong values were passed to the pipe command ($thisaddress had the
3644 value of $0, $0 had the value of $1, etc). This bug was introduced by
3645 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3646
364738. Improved the line breaking for long SMTP error messages from ACLs.
3648 Previously, if there was no break point between 40 and 75 characters, Exim
3649 left the rest of the message alone. Two changes have been made: (a) I've
3650 reduced the minimum length to 35 characters; (b) if it can't find a break
3651 point between 35 and 75 characters, it looks ahead and uses the first one
3652 that it finds. This may give the occasional overlong line, but at least the
3653 remaining text gets split now.
3654
365539. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3656 file descriptors might be low, and that setting 1000 would always raise it.
3657 It turns out that in some environments, the limit is already over 1000 and
3658 that lowering it causes trouble. So now Exim takes care not to decrease it.
3659
366040. When delivering a message, the value of $return_path is set to $sender_
3661 address at the start of routing (routers may change the value). By an
3662 oversight, this default was not being set up when an address was tested by
3663 -bt or -bv, which affected the outcome if any router or filter referred to
3664 $return_path.
3665
366641. The idea of the "warn" ACL verb is that it adds a header or writes to the
3667 log only when "message" or "log_message" are set. However, if one of the
3668 conditions was an address verification, or a call to a nested ACL, the
3669 messages generated by the underlying test were being passed through. This
3670 no longer happens. The underlying message is available in $acl_verify_
3671 message for both "message" and "log_message" expansions, so it can be
3672 passed through if needed.
3673