TK/02 TK/03
[exim.git] / doc / doc-txt / ChangeLog
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11d337a4 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.142 2005/05/24 08:28:58 tom Exp $
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2
3Change log file for Exim from version 4.21
4-------------------------------------------
5
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7Exim version 4.52
8-----------------
9
10TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
11
22c3b60b
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12PH/01 When a transport filter timed out in a pipe delivery, and the pipe
13 command itself ended in error, the underlying message about the transport
14 filter timeout was being overwritten with the pipe command error. Now the
15 underlying error message should be appended to the second error message.
16
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17TK/01 Fix poll() being unavailable on Mac OSX 10.2.
18
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19PH/02 Reduce the amount of output that "make" produces by default. Full output
20 can still be requested.
21
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22PH/03 The warning log line about a condition test deferring for a "warn" verb
23 was being output only once per connection, rather than after each
24 occurrence (because it was using the same function as for successful
25 "warn" verbs). This seems wrong, so I have changed it.
26
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27TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
28 it should not have, which might have caused a crash in the right
29 circumstances, but probably never did.
30
31PH/04 Installed a modified version of Tony Finch's patch to make submission
32 mode fix the return path as well as the Sender: header line, and to
33 add a /name= option so that you can make the user's friendly name appear
34 in the header line.
35
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36TF/03 Added the control = fakedefer ACL modifier.
37
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38TF/04 Added the ratelimit ACL condition. See NewStuff for details.
39
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40TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
41
42TK/03 Merged latest SRS patch from Miles Wilton.
43
44
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46Exim version 4.51
47-----------------
48
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49TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
50 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
51
2f079f46 52TK/02 Fix ACL "control" statement not being available in MIME ACL.
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53
54TK/03 Fix ACL "regex" condition not being available in MIME ACL.
55
56PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
57 to test Sieve filters that use "vacation".
58
59PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
60 that changes the way the GnuTLS parameters are stored in the cache file.
61 The new format can be generated externally. For backward compatibility,
62 if the data in the cache doesn't make sense, Exim assumes it has read an
63 old-format file, and it generates new data and writes a new file. This
64 means that you can't go back to an older release without removing the
65 file.
66
67PH/03 A redirect router that has both "unseen" and "one_time" set does not
68 work if there are any delivery delays because "one_time" forces the
69 parent to be marked "delivered", so its unseen clone is never tried
70 again. For this reason, Exim now forbids the simultaneous setting of
71 these two options.
72
73PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
74 redirected to themselves ("homonym" addresses). Read the long ChangeLog
75 entry if you want to know the details. The fix, however, neglected to
76 consider the case when local delivery batching is involved. The test for
77 "previously delivered" was not happening when checking to see if an
78 address could be batched with a previous (undelivered) one; under
79 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 80 address.
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81
82PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
83 in its include files, and this causes problems building Exim.
84
85PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
86 header_syntax) but Exim was just ignoring anything given after a slash.
87 In particular, this caused confusion with an attempt to use "verify =
88 reverse_host_lookup/defer_ok". An error is now given when options are
89 supplied for verify items that do not have them. (Maybe reverse_host_
90 lookup should have a defer_ok option, but that's a different point.)
91
92PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
93 defined by RFC 821) to 2048, because there were problems with some AUTH
94 commands, and RFC 1869 says the size should be increased for extended
95 SMTP commands that take arguments.
96
97PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
98 Finch).
99
100PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
101 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 102
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103PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
104 an address' error message when a string expansion fails (syntax or
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105 whatever). Otherwise the password may appear in the log. Following change
106 PH/42 below, there is no longer a chance of it appearing in a bounce
107 message.
49c2d5ea 108
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109PH/11 Installed exipick version 20050225.0 from John Jetmore.
110
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111PH/12 If the last host in a fallback_hosts list was multihomed, only the first
112 of its addresses was ever tried. (Bugzilla bug #2.)
113
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114PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
115 the result incorrectly in the debug output. (It correctly added a newline
116 to what was transported.)
117
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118TF/01 Added $received_time.
119
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120PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
121 commented out examples of how to interface to a virus scanner and to
122 SpamAssassin. Also added commented examples of av_scanner and
123 spamd_address settings.
124
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125PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
126 and controls are allowed in which ACLs. There were a couple of minor
127 errors. Some of the entries in the conditions table (which is a table of
128 where they are NOT allowed) were getting very unwieldy; rewrote them as a
129 negation of where the condition IS allowed.
130
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131PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
132
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133PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
134 header file does not have a version number, so I've had to invent a new
135 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
136 API. The code is untested by me (my Linux distribution still has 0.3.2 of
137 radiusclient), but it was contributed by a Radius user.
138
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139PH/18 Installed Lars Mainka's patch for the support of CRL collections in
140 files or directories, for OpenSSL.
141
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142PH/19 When an Exim process that is running as root has to create an Exim log
143 file, it does so in a subprocess that runs as exim:exim so as to get the
144 ownership right at creation (otherwise, other Exim processes might see
145 the file with the wrong ownership). There was no test for failure of this
146 fork() call, which would lead to the process getting stuck as it waited
147 for a non-existent subprocess. Forks do occasionally fail when resources
148 run out. I reviewed all the other calls to fork(); they all seem to check
149 for failure.
150
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151PH/20 When checking for unexpected SMTP input at connect time (before writing
152 the banner), Exim was not dealing correctly with a non-positive return
153 from the read() function. If the client had disconnected by this time,
154 the result was a log entry for a synchronization error with an empty
155 string after "input=" when read() returned zero. If read() returned -1
156 (an event I could not check), uninitialized data bytes were printed.
157 There were reports of junk text (parts of files, etc) appearing after
158 "input=".
159
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160PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
161
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162PH/22 Added support for macro redefinition, and (re)definition in between
163 driver and ACL definitions.
164
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165PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
166 forgetting to use the resulting value; it was using the unexpanded value.
167
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168PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
169 hadn't been configured. The fix is from Juergen Kreileder, who
170 understands it better than I do:
171
172 "Here's what I see happening with three configured cyrus_sasl
173 authenticators configured (plain, login, cram-md5):
174
175 On startup auth_cyrus_sasl_init() gets called for each of these.
176 This means three calls to sasl_listmech() without a specified mech_list.
177 => SASL tests which mechs of all available mechs actually work
178 => three warnings about OTP not working
179 => the returned list contains: plain, login, cram-md5, digest-md5, ...
180
181 With the patch, sasl_listmech() also gets called three times. But now
182 SASL's mech_list option is set to the server_mech specified in the the
183 authenticator. Or in other words, the answer from sasl_listmech()
184 gets limited to just the mech you're testing for (which is different
185 for each call.)
186 => the return list contains just 'plain' or 'login', 'cram-md5' or
187 nothing depending on the value of ob->server_mech.
188
189 I've just tested the patch: Authentication still works fine,
190 unavailable mechs specified in the exim configuration are still
191 caught, and the auth.log warnings about OTP are gone."
192
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193PH/25 When debugging is enabled, the contents of the command line are added
194 to the debugging output, even when log_selector=+arguments is not
195 specified.
196
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197PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
198 answer is "GNU", and only if the return is "GNU/something" is the answer
199 "Linux".
200
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201PH/27 $acl_verify_message is now set immediately after the failure of a
202 verification in an ACL, and so is available in subsequent modifiers. In
203 particular, the message can be preserved by coding like this:
204
205 warn !verify = sender
206 set acl_m0 = $acl_verify_message
207
208 Previously, $acl_verify_message was set only while expanding "message"
209 and "log_message" when a very denied access.
210
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211PH/28 Modified OS/os.c-Linux with
212
213 -#ifndef OS_LOAD_AVERAGE
214 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
215
216 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
217 nomenclature these days.)
218
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219PH/29 Installed patch from the Sieve maintainer that adds the options
220 sieve_useraddress and sieve_subaddress to the redirect router.
221
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222PH/30 In these circumstances:
223 . Two addresses routed to the same list of hosts;
224 . First host does not offer TLS;
225 . First host accepts first address;
226 . First host gives temporary error to second address;
227 . Second host offers TLS and a TLS session is established;
228 . Second host accepts second address.
229 Exim incorrectly logged both deliveries with the TLS parameters (cipher
230 and peerdn, if requested) that were in fact used only for the second
231 address.
7e8bec7a 232
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233PH/31 When doing a callout as part of verifying an address, Exim was not paying
234 attention to any local part prefix or suffix that was matched by the
235 router that accepted the address. It now behaves in the same way as it
236 does for delivery: the affixes are removed from the local part unless
237 rcpt_include_affixes is set on the transport.
238
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239PH/32 Add the sender address, as F=<...>, to the log line when logging a
240 timeout during the DATA phase of an incoming message.
241
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242PH/33 Sieve envelope tests were broken for match types other than :is. I have
243 applied a patch sanctioned by the Sieve maintainer.
c688b954 244
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245PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
246 the uid or gid is negative. A case of a negative gid caused this to be
247 noticed. The fix allows for either to be negative.
248
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249PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
250 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
251 overlooked.
252
253PH/36 The change PH/12 above was broken. Fixed it.
254
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255PH/37 Exim used to check for duplicate addresses in the middle of routing, on
256 the grounds that routing the same address twice would always produce the
257 same answer. This might have been true once, but it is certainly no
258 longer true now. Routing a child address may depend on the previous
259 routing that produced that child. Some complicated redirection strategies
260 went wrong when messages had multiple recipients, and made Exim's
261 behaviour dependent on the order in which the addresses were given.
262
263 I have moved the duplicate checking until after the routing is complete.
264 Exim scans the addresses that are assigned to local and remote
265 transports, and removes any duplicates. This means that more work will be
266 done, as duplicates will always all be routed, but duplicates are
267 presumably rare, so I don't expect this is of any significance.
268
269 For deliveries to pipes, files, and autoreplies, the duplicate checking
270 still happens during the routing process, since they are not going to be
271 routed further.
272
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273PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
274 It corrects a timeout issue with spamd. This is Ian's comment: "The
275 background is that sometimes spamd either never reads data from a
276 connection it has accepted, or it never writes response data. The exiscan
277 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
278 blindly assumes that writes won't block so it may never time out."
279
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280PH/39 Allow G after quota size as well as K and M.
281
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282PH/40 The value set for $authenticated_id in an authenticator may not contain
283 binary zeroes or newlines because the value is written to log lines and
284 to spool files. There was no check on this. Now the value is run through
285 the string_printing() function so that such characters are converted to
286 printable escape sequences.
287
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288PH/41 $message_linecount is a new variable that contains the total number of
289 lines in the message. Compare $body_linecount, which is the count for the
290 body only.
291
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292PH/42 Exim no longer gives details of delivery errors for specific addresses in
293 bounce and delay warning messages, except in certain special cases, which
294 are as follows:
295
296 (a) An SMTP error message from a remote host;
297 (b) A message specified in a :fail: redirection;
298 (c) A message specified in a "fail" command in a system filter;
299 (d) A message specified in a FAIL return from the queryprogram router;
300 (e) A message specified by the cannot_route_message router option.
301
302 In these cases only, Exim does include the error details in bounce and
303 warning messages. There are also a few cases where bland messages such
304 as "unrouteable address" or "local delivery error" are given.
305
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306PH/43 $value is now also set for the "else" part of a ${run expansion.
307
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308PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
309 being worked on, but at least Exim now implements the latest version to
310 play with."
311
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312PH/45 In a pipe transport, although a timeout while waiting for the pipe
313 process to complete was treated as a delivery failure, a timeout while
314 writing the message to the pipe was logged, but erroneously treated as a
315 successful delivery. Such timeouts include transport filter timeouts. For
316 consistency with the overall process timeout, these timeouts are now
317 treated as errors, giving rise to delivery failures by default. However,
318 there is now a new Boolean option for the pipe transport called
319 timeout_defer, which, if set TRUE, converts the failures into defers for
320 both kinds of timeout. A transport filter timeout is now identified in
321 the log output.
322
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323PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
324 systems where "make" and "gmake" are different, calling "gmake" at top
325 level broke things. I've arranged for the value of $(MAKE) to be passed
326 from the Makefile to this script so that it can call the same version of
327 "make".
328
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330A note about Exim versions 4.44 and 4.50
331----------------------------------------
332
333Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
334changes of various kinds. As a consequence, a big documentation update was
335needed. This delayed the release for rather longer than seemed good, especially
336in the light of a couple of (minor) security issues. Therefore, the changes
337that fixed bugs were backported into 4.43, to create a 4.44 maintenance
338release. So 4.44 and 4.50 are in effect two different branches that both start
339from 4.43.
340
341I have left the 4.50 change log unchanged; it contains all the changes since
3424.43. The change log for 4.44 is below; many of its items are identical to
343those for 4.50. This seems to be the most sensible way to preserve the
344historical information.
345
346
f7b63901 347Exim version 4.50
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348-----------------
349
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350 1. Minor wording change to the doc/README.SIEVE file.
351
139059f6 352 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 353 computation of the current number of files was incorrect.
495ae4b0 354
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355 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
356 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
357 place.
358
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359 4. Give more explanation in the error message when the command for a transport
360 filter fails to execute.
361
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362 5. There are several places where Exim runs a non-Exim command in a
363 subprocess. The SIGUSR1 signal should be disabled for these processes. This
364 was being done only for the command run by the queryprogram router. It is
365 now done for all such subprocesses. The other cases are: ${run, transport
366 filters, and the commands run by the lmtp and pipe transports.
367
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368 6. Added CONFIGURE_GROUP build-time option.
369
370 7. Some older OS have a limit of 256 on the maximum number of file
371 descriptors. Exim was using setrlimit() to set 1000 as a large value
372 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
373 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 374
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375 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
376 was an oversight, and furthermore, ever since the addition of extra
377 controls (e.g. 4.43/32), the checks on when to allow different forms of
378 "control" were broken. There should now be diagnostics for all cases when a
379 control that does not make sense is encountered.
380
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381 9. Added the /retain_sender option to "control=submission".
382
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38310. $recipients is now available in the predata ACL (oversight).
384
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38511. Tidy the search cache before the fork to do a delivery from a message
386 received from the command line. Otherwise the child will trigger a lookup
387 failure and thereby defer the delivery if it tries to use (for example) a
388 cached ldap connection that the parent has called unbind on.
389
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39012. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
391 of $address_data from the recipient verification was clobbered by the
392 sender verification.
393
39413. The value of address_data from a sender verification is now available in
395 $sender_address_data in subsequent conditions in the ACL statement.
396
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39714. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
398
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39915. Added a new option "connect=<time>" to callout options, to set a different
400 connection timeout.
401
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40216. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
403 was its contents. (It was OK if the option was not defined at all.)
404
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40517. A "Completed" log line is now written for messages that are removed from
406 the spool by the -Mrm option.
407
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40818. New variables $sender_verify_failure and $recipient_verify_failure contain
409 information about exactly what failed.
410
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41119. Added -dd to debug only the daemon process.
412
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41320. Incorporated Michael Haardt's patch to ldap.c for improving the way it
414 handles timeouts, both on the server side and network timeouts. Renamed the
415 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
416
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41721. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
418 It is now set to "smtps".
419
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42022. $host_address is now set to the target address during the checking of
421 ignore_target_hosts.
422
42323. When checking ignore_target_hosts for an ipliteral router, no host name was
424 being passed; this would have caused $sender_host_name to have been used if
425 matching the list had actually called for a host name (not very likely,
426 since this list is usually IP addresses). A host name is now passed as
427 "[x.x.x.x]".
428
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42924. Changed the calls that set up the SIGCHLD handler in the daemon to use the
430 code that specifies a non-restarting handler (typically sigaction() in
431 modern systems) in an attempt to fix a rare and obscure crash bug.
432
43325. Narrowed the window for a race in the daemon that could cause it to ignore
434 SIGCHLD signals. This is not a major problem, because they are used only to
435 wake it up if nothing else does.
436
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43726. A malformed maildirsize file could cause Exim to calculate negative values
438 for the mailbox size or file count. Odd effects could occur as a result.
439 The maildirsize information is now recalculated if the size or filecount
440 end up negative.
441
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44227. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
443 support for a long time. Removed HAVE_SYS_VFS_H.
444
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44528. Installed the latest version of exipick from John Jetmore.
446
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44729. In an address list, if the pattern was not a regular expression, an empty
448 subject address (from a bounce message) matched only if the pattern was an
449 empty string. Non-empty patterns were not even tested. This was the wrong
450 because it is perfectly reasonable to use an empty address as part of a
451 database query. An empty address is now tested by patterns that are
452 lookups. However, all the other forms of pattern expect the subject to
453 contain a local part and a domain, and therefore, for them, an empty
454 address still always fails if the pattern is not itself empty.
455
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45630. Exim went into a mad DNS loop when attempting to do a callout where the
457 host was specified on an smtp transport, and looking it up yielded more
458 than one IP address.
459
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46031. Re-factored the code for checking spool and log partition space into a
461 function that finds that data and another that does the check. The former
462 is then used to implement four new variables: $spool_space, $log_space,
463 $spool_inodes, and $log_inodes.
464
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46532. The RFC2047 encoding function was originally intended for short strings
466 such as real names; it was not keeping to the 75-character limit for
467 encoded words that the RFC imposes. It now respects the limit, and
468 generates multiple encoded words if necessary. To be on the safe side, I
469 have increased the buffer size for the ${rfc2047: expansion operator from
470 1024 to 2048 bytes.
471
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47233. It is now permitted to omit both strings after an "if" condition; if the
473 condition is true, the result is "true". As before, when the second string
474 is omitted, a false condition yields an empty string. This makes it less
475 cumbersome to write custom ACL and router conditions.
476
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47734. Failure to deliver a bounce message always caused it to be frozen, even if
478 there was an errors_to setting on the router. The errors_to setting is now
479 respected.
480
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48135. If an IPv6 address is given for -bh or -bhc, it is now converted to the
482 canonical form (fully expanded) before being placed in
483 $sender_host_address.
484
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48536. The table in the code that translates DNS record types into text (T_A to
486 "A" for instance) was missing entries for NS and CNAME. It is just possible
487 that this could have caused confusion if both these types were looked up
488 for the same domain, because the text type is used as part of Exim's
489 per-process caching. But the chance of anyone hitting this buglet seems
490 very small.
491
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49237. The dnsdb lookup has been extended in a number of ways.
493
494 (1) There is a new type, "zns", which walks up the domain tree until it
495 finds some nameserver records. It should be used with care.
496
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497 (2) There is a new type, "mxh", which is like "mx" except that it returns
498 just the host names, not the priorities.
499
500 (3) It is now possible to give a list of domains (or IP addresses) to be
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501 looked up. The behaviour when one of the lookups defers can be
502 controlled by a keyword.
7bb56e1f 503
ea3bc19b 504 (4) It is now possible to specify the separator character for use when
7bb56e1f 505 multiple records are returned.
33397d19 506
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50738. The dnslists ACL condition has been extended: it is now possible to supply
508 a list of IP addresses and/or domains to be looked up in a particular DNS
509 domain.
510
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51139. Added log_selector=+queue_time_overall.
512
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51340. When running the queue in the test harness, wait just a tad after forking a
514 delivery process, to get repeatability of debugging output.
515
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PH
51641. Include certificate and key file names in error message when GnuTLS fails
517 to set them up, because the GnuTLS error message doesn't include the name
518 of the failing file when there is a problem reading it.
519
f05da2e8
PH
52042. Allow both -bf and -bF in the same test run.
521
d6453af2
PH
52243. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
523
f7b63901
PH
52444. The "Exiscan patch" is now merged into the mainline Exim source.
525
52645. Sometimes the final signoff response after QUIT could fail to get
527 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
528 < 0 before doing a fflush(). This bug looks as though it goes back to the
529 introduction of TLS in release 3.20, but "sometimes" must have been rare
530 because the tests only now provoked it.
531
a444213a
PH
53246. Reset the locale to "C" after calling embedded Perl, in case it was changed
533 (this can affect the format of dates).
534
0ec020ea
PH
53547. exim_tidydb, when checking for the continued existence of a message for
536 which it has found a message-specific retry record, was not finding
537 messages that were in split spool directories. Consequently, it was
538 deleting retry records that should have stayed in existence.
539
b1206957
PH
54048. Steve fixed some bugs in eximstats.
541
54249. The SPA authentication driver was not abandoning authentication and moving
543 on to the next authenticator when an expansion was forced to fail,
544 contradicting the general specification for all authenticators. Instead it
545 was generating a temporary error. It now behaves as specified.
546
26dd5a95
PH
54750. The default ordering of permitted cipher suites for GnuTLS was pessimal
548 (the order specifies the preference for clients). The order is now AES256,
549 AES128, 3DES, ARCFOUR128.
550
343b2385
PH
55151. Small patch to Sieve code - explicitly set From: when generating an
552 autoreply.
553
1c5466b9
PH
55452. Exim crashed if a remote delivery caused a very long error message to be
555 recorded - for instance if somebody sent an entire SpamAssassin report back
556 as a large number of 550 error lines. This bug was coincidentally fixed by
557 increasing the size of one of Exim's internal buffers (big_buffer) that
558 happened as part of the Exiscan merge. However, to be on the safe side, I
559 have made the code more robust (and fixed the comments that describe what
560 is going on).
561
55ee9ee3
PH
56253. Now that there can be additional text after "Completed" in log lines (if
563 the queue_time_overall log selector is set), a one-byte patch to exigrep
564 was needed to allow it to recognize "Completed" as not the last thing in
565 the line.
566
d38f8232
PH
56754. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
568 patch that reportedly fixes this has been added. I am not expert enough to
569 create a test for it. This is what the patch creator wrote:
570
571 "I found a little strange behaviour of ldap code when working with
572 Windows 2003 AD Domain, where users was placed in more than one
573 Organization Units. When I tried to give exim partial DN, the exit code
574 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
575 But simultaneously result of request was absolutely normal ldap result,
576 so I produce this patch..."
577
3295e65b
PH
578 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
579 REFERENCE, so I have modified the code to exclude the patch when that macro
580 is not defined.
581
7102e136
PH
58255. Some experimental protocols are using DNS PTR records for new purposes. The
583 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
584 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
585 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 586 CAN-2005-0021
7102e136 587
3ca0ba97
PH
58856. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
589
c2bcbe20
PH
59057. Double the size of the debug message buffer (to 2048) so that more of very
591 long debug lines gets shown.
592
18ce445d
PH
59358. The exicyclog utility now does better if the number of log files to keep
594 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
595
1f5b4c3d
PH
59659. Two changes related to the smtp_active_hostname option:
597
598 (1) $smtp_active_hostname is now available as a variable.
599 (2) The default for smtp_banner uses $smtp_active_hostname instead
600 of $primary_hostname.
601
b975ba52
PH
60260. The host_aton() function is supposed to be passed a string that is known
603 to be a valid IP address. However, in the case of IPv6 addresses, it was
604 not checking this. This is a hostage to fortune. Exim now panics and dies
605 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
606 from a dnsdb PTR lookup with an IPv6 address that had more than 8
607 components; fortuitously, this particular loophole had already been fixed
608 by change 4.50/55 above.
609
610 If there are any other similar loopholes, the new check in host_aton()
611 itself should stop them being exploited. The report I received stated that
612 data on the command line could provoke the exploit when Exim was running as
613 exim, but did not say which command line option was involved. All I could
614 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
615 running as the user.
ea3a6f44 616 CAN-2005-0021
85b87bc2
PH
617
61861. There was a buffer overflow vulnerability in the SPA authentication code
619 (which came originally from the Samba project). I have added a test to the
620 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 621 CAN-2005-0022
b975ba52 622
17ffcae7
PH
62362. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
624 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
625
d95f9fdb
PH
62663. The daemon start-up calls getloadavg() while still root for those OS that
627 need the first call to be done as root, but it missed one case: when
628 deliver_queue_load_max is set with deliver_drop_privilege. This is
629 necessary for the benefit of the queue runner, because there is no re-exec
630 when deliver_drop_privilege is set.
631
86b8287f
PH
63264. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
633 This has been fixed.
634
60dc5e56
PH
63565. Caching of lookup data for "hosts =" ACL conditions, when a named host list
636 was in use, was not putting the data itself into the right store pool;
637 consequently, it could be overwritten for a subsequent message in the same
638 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
639 the caching.)
640
533244af
PH
64166. Added hosts_max_try_hardlimit to the smtp transport, default 50.
642
a5a28604
PH
64367. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
644 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
645 the function were treating the return as a boolean value, which happened to
646 work because 0=false and not-0=true, but is not correct code.
647
7e634d24
PH
64868. The host_aton() function was not handling scoped IPv6 addresses (those
649 with, for example, "%eth0" on the end) correctly.
650
3e11c26b
PH
65169. Fixed some compiler warnings in acl.c for the bitmaps specified with
652 negated items (that is, ~something) in unsigned ints. Some compilers
653 apparently mutter when there is no cast.
654
6729cf78
PH
65570. If an address verification called from an ACL failed, and did not produce a
656 user-specific message (i.e. there was only a "system" message), nothing was
657 put in $acl_verify_message. In this situation, it now puts the system
658 message there.
659
00f00ca5
PH
66071. Change 4.23/11 added synchronization checking at the start of an SMTP
661 session; change 4.31/43 added the unwanted input to the log line - except
662 that it did not do this in the start of session case. It now does.
663
c9bdd01c
PH
66472. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
665 This is wrong and can cause the other end to generate a synchronization
666 error if it is another Exim or anything else that does the synchronization
667 check. A QUIT command is no longer sent after a timeout.
668
d43194df
PH
66973. $host_lookup_deferred has been added, to make it easier to detect DEFERs
670 during host lookups.
671
fe5b5d0b
PH
67274. The defer_ok option of callout verification was not working if it was used
673 when verifying addresses in header lines, that is, for this case:
674
675 verify = header_sender/callout=defer_ok
676
76a2d7ba
PH
67775. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
678 those file descriptors could be used for SMTP connections. If anything
679 wrote to stderr (the example that came up was "warn" in embedded Perl), it
680 could be sent to the SMTP client, causing chaos. The daemon now opens
681 stdin, stdout, and stderr to /dev/null when it puts itself into the
682 background.
683
68476. Arrange for output from Perl's "warn" command to be written to Exim's main
685 log by default. The user can override this with suitable Perl magic.
686
04f7d5b9
PH
68777. The use of log_message on a "discard" ACL verb, which is supposed to add to
688 the log message when discard triggers, was not working for the DATA ACL or
689 for the non-SMTP ACL.
690
bc60667e
PH
69178. Error message wording change in sieve.c.
692
bb6e88ff
PH
69379. If smtp_accept_max_per_host was set, the number of connections could be
694 restricted to fewer than expected, because the daemon was trying to set up
695 a new connection before checking whether the processes handling previous
696 connections had finished. The check for completed processes is now done
697 earlier. On busy systems, this bug wouldn't be noticed because something
698 else would have woken the daemon, and it would have reaped the completed
699 process earlier.
700
1e70f85b
PH
70180. If a message was submitted locally by a user whose login name contained one
702 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
703 It caused a spool format error. I have fixed the spool reading code. A
704 related problem was that the "from" clause in the Received: line became
705 illegal because of the space(s). It is now covered by ${quote_local_part.
706
70781. Included the latest eximstats from Steve (adds average sizes to HTML Top
708 tables).
709
4e01f9d6
PH
71082. Updated OS/Makefile-AIX as per message from Mike Meredith.
711
1ee1cef2
PH
71283. Patch from Sieve maintainer to fix unterminated string problem in
713 "vacation" handling.
714
6e2b4ccc
PH
71584. Some minor changes to the Linux configuration files to help with other
716 OS variants using glibc.
717
8e669ac1
PH
71885. One more patch for Sieve to update vacation handling to latest spec.
719
495ae4b0 720
bbe902f0
PH
721----------------------------------------------------
722See the note above about the 4.44 and 4.50 releases.
723----------------------------------------------------
724
725
726Exim version 4.44
727-----------------
728
729 1. Change 4.43/35 introduced a bug that caused file counts to be
730 incorrectly computed when quota_filecount was set in an appendfile
731 transport
732
733 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
734 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
735 place.
736
737 3. Give more explanation in the error message when the command for a transport
738 filter fails to execute.
739
740 4. There are several places where Exim runs a non-Exim command in a
741 subprocess. The SIGUSR1 signal should be disabled for these processes. This
742 was being done only for the command run by the queryprogram router. It is
743 now done for all such subprocesses. The other cases are: ${run, transport
744 filters, and the commands run by the lmtp and pipe transports.
745
746 5. Some older OS have a limit of 256 on the maximum number of file
747 descriptors. Exim was using setrlimit() to set 1000 as a large value
748 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
749 systems. I've change it so that if it can't get 1000, it tries for 256.
750
751 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
752 was an oversight, and furthermore, ever since the addition of extra
753 controls (e.g. 4.43/32), the checks on when to allow different forms of
754 "control" were broken. There should now be diagnostics for all cases when a
755 control that does not make sense is encountered.
756
757 7. $recipients is now available in the predata ACL (oversight).
758
759 8. Tidy the search cache before the fork to do a delivery from a message
760 received from the command line. Otherwise the child will trigger a lookup
761 failure and thereby defer the delivery if it tries to use (for example) a
762 cached ldap connection that the parent has called unbind on.
763
764 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
765 of $address_data from the recipient verification was clobbered by the
766 sender verification.
767
76810. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
769 was its contents. (It was OK if the option was not defined at all.)
770
77111. A "Completed" log line is now written for messages that are removed from
772 the spool by the -Mrm option.
773
77412. $host_address is now set to the target address during the checking of
775 ignore_target_hosts.
776
77713. When checking ignore_target_hosts for an ipliteral router, no host name was
778 being passed; this would have caused $sender_host_name to have been used if
779 matching the list had actually called for a host name (not very likely,
780 since this list is usually IP addresses). A host name is now passed as
781 "[x.x.x.x]".
782
78314. Changed the calls that set up the SIGCHLD handler in the daemon to use the
784 code that specifies a non-restarting handler (typically sigaction() in
785 modern systems) in an attempt to fix a rare and obscure crash bug.
786
78715. Narrowed the window for a race in the daemon that could cause it to ignore
788 SIGCHLD signals. This is not a major problem, because they are used only to
789 wake it up if nothing else does.
790
79116. A malformed maildirsize file could cause Exim to calculate negative values
792 for the mailbox size or file count. Odd effects could occur as a result.
793 The maildirsize information is now recalculated if the size or filecount
794 end up negative.
795
79617. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
797 support for a long time. Removed HAVE_SYS_VFS_H.
798
ea3a6f44 79918. Updated exipick to current release from John Jetmore.
bbe902f0
PH
800
80119. Allow an empty sender to be matched against a lookup in an address list.
802 Previously the only cases considered were a regular expression, or an
803 empty pattern.
804
80520. Exim went into a mad DNS lookup loop when doing a callout where the
806 host was specified on the transport, if the DNS lookup yielded more than
807 one IP address.
808
ea3a6f44
NM
80921. The RFC2047 encoding function was originally intended for short strings
810 such as real names; it was not keeping to the 75-character limit for
811 encoded words that the RFC imposes. It now respects the limit, and
812 generates multiple encoded words if necessary. To be on the safe side, I
813 have increased the buffer size for the ${rfc2047: expansion operator from
814 1024 to 2048 bytes.
bbe902f0 815
ea3a6f44
NM
81622. Failure to deliver a bounce message always caused it to be frozen, even if
817 there was an errors_to setting on the router. The errors_to setting is now
818 respected.
bbe902f0
PH
819
82023. If an IPv6 address is given for -bh or -bhc, it is now converted to the
821 canonical form (fully expanded) before being placed in
822 $sender_host_address.
823
82424. Updated eximstats to version 1.33
825
ea3a6f44
NM
82625. Include certificate and key file names in error message when GnuTLS fails
827 to set them up, because the GnuTLS error message doesn't include the name
828 of the failing file when there is a problem reading it.
bbe902f0
PH
829
83026. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 831 As per change 25.
bbe902f0 832
ea3a6f44
NM
83327. Reset the locale to "C" after calling embedded Perl, in case it was changed
834 (this can affect the format of dates).
bbe902f0 835
ea3a6f44
NM
83628. exim_tidydb, when checking for the continued existence of a message for
837 which it has found a message-specific retry record, was not finding
838 messages that were in split spool directories. Consequently, it was
839 deleting retry records that should have stayed in existence.
bbe902f0
PH
840
84129. eximstats updated to version 1.35
842 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
843 1.35 - bugfix such that pie charts by volume are generated correctly
844
ea3a6f44
NM
84530. The SPA authentication driver was not abandoning authentication and moving
846 on to the next authenticator when an expansion was forced to fail,
847 contradicting the general specification for all authenticators. Instead it
848 was generating a temporary error. It now behaves as specified.
bbe902f0 849
ea3a6f44
NM
85031. The default ordering of permitted cipher suites for GnuTLS was pessimal
851 (the order specifies the preference for clients). The order is now AES256,
852 AES128, 3DES, ARCFOUR128.
bbe902f0 853
ea3a6f44
NM
85431. Small patch to Sieve code - explicitly set From: when generating an
855 autoreply.
bbe902f0 856
ea3a6f44
NM
85732. Exim crashed if a remote delivery caused a very long error message to be
858 recorded - for instance if somebody sent an entire SpamAssassin report back
859 as a large number of 550 error lines. This bug was coincidentally fixed by
860 increasing the size of one of Exim's internal buffers (big_buffer) that
861 happened as part of the Exiscan merge. However, to be on the safe side, I
862 have made the code more robust (and fixed the comments that describe what
863 is going on).
bbe902f0 864
ea3a6f44
NM
86533. Some experimental protocols are using DNS PTR records for new purposes. The
866 keys for these records are domain names, not reversed IP addresses. The
867 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
868 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
869 CAN-2005-0021
870
ea3a6f44
NM
87134. The host_aton() function is supposed to be passed a string that is known
872 to be a valid IP address. However, in the case of IPv6 addresses, it was
873 not checking this. This is a hostage to fortune. Exim now panics and dies
874 if the condition is not met. A case was found where this could be provoked
875 from a dnsdb PTR lookup with an IPv6 address that had more than 8
876 components; fortuitously, this particular loophole had already been fixed
877 by change 4.50/55 or 4.44/33 above.
878
879 If there are any other similar loopholes, the new check in host_aton()
880 itself should stop them being exploited. The report I received stated that
881 data on the command line could provoke the exploit when Exim was running as
882 exim, but did not say which command line option was involved. All I could
883 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
884 running as the user.
bbe902f0
PH
885 CAN-2005-0021
886
ea3a6f44
NM
88735. There was a buffer overflow vulnerability in the SPA authentication code
888 (which came originally from the Samba project). I have added a test to the
889 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
890 CAN-2005-0022
891
ea3a6f44
NM
89236. The daemon start-up calls getloadavg() while still root for those OS that
893 need the first call to be done as root, but it missed one case: when
894 deliver_queue_load_max is set with deliver_drop_privilege. This is
895 necessary for the benefit of the queue runner, because there is no re-exec
896 when deliver_drop_privilege is set.
bbe902f0 897
ea3a6f44
NM
89837. Caching of lookup data for "hosts =" ACL conditions, when a named host list
899 was in use, was not putting the data itself into the right store pool;
900 consequently, it could be overwritten for a subsequent message in the same
901 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
902 the caching.)
bbe902f0 903
ea3a6f44
NM
90438. Sometimes the final signoff response after QUIT could fail to get
905 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
906 < 0 before doing a fflush(). This bug looks as though it goes back to the
907 introduction of TLS in release 3.20, but "sometimes" must have been rare
908 because the tests only now provoked it.
bbe902f0
PH
909
910
495ae4b0
PH
911Exim version 4.43
912-----------------
913
914 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
915 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
916 Now it returns an integer. A number of calls were still expecting a T/F
917 return. Fortuitously, in all cases, the tests worked in OK situations,
918 which is the norm. However, things would have gone wrong on any write
919 failures on the smtp file descriptor. This function is used when sending
920 messages over SMTP and also when doing verify callouts.
921
922 2. When Exim is called to do synchronous delivery of a locally submitted
923 message (the -odf or -odi options), it no longer closes stderr before doing
924 the delivery.
925
926 3. Implemented the mua_wrapper option.
927
928 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
929
930 5. Implemented the functions header_remove(), header_testname(),
931 header_add_at_position(), and receive_remove_recipient(), and exported them
932 to local_scan().
933
934 6. If an ACL "warn" statement specified the addition of headers, Exim already
935 inserted X-ACL-Warn: at the start if there was no header name. However, it
936 was not making this test for the second and subsequent header lines if
937 there were newlines in the string. This meant that an invalid header could
938 be inserted if Exim was badly configured.
939
940 7. Allow an ACL "warn" statement to add header lines at the start or after all
941 the Received: headers, as well as at the end.
942
943 8. Added the rcpt_4xx retry error code.
944
945 9. Added postmaster_mailfrom=xxx to callout verification option.
946
94710. Added mailfrom=xxxx to the callout verification option, for verify=
948 header_sender only.
949
95011. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
951 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
952
95312. Inserted some casts to stop certain compilers warning when using pointer
954 differences as field lengths or precisions in printf-type calls (mostly
955 affecting debugging statements).
956
95713. Added optional readline() support for -be (dynamically loaded).
958
95914. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
960 same clock tick as a message's arrival, so that its received time was the
961 same as the "first fail" time on the retry record, and that message
962 remained on the queue past the ultimate address timeout, every queue runner
963 would try a delivery (because it was past the ultimate address timeout) but
964 after another failure, the ultimate address timeout, which should have then
965 bounced the address, did not kick in. This was a "< instead of <=" error;
966 in most cases the first failure would have been in the next clock tick
967 after the received time, and all would be well.
968
96915. The special items beginning with @ in domain lists (e.g. @mx_any) were not
970 being recognized when the domain list was tested by the match_domain
971 condition in an expansion string.
972
97316. Added the ${str2b64: operator.
974
97517. Exim was always calling setrlimit() to set a large limit for the number of
976 processes, without checking whether the existing limit was already
977 adequate. (It did check for the limit on file descriptors.) Furthermore,
978 errors from getrlimit() and setrlimit() were being ignored. Now they are
979 logged to the main and panic logs, but Exim does carry on, to try to do its
980 job under whatever limits there are.
981
98218. Imported PCRE 5.0.
983
98419. Trivial typo in log message " temporarily refused connection" (the leading
985 space).
986
98720. If the log selector return_path_on_delivery was set and an address was
988 redirected to /dev/null, the delivery process crashed because it assumed
989 that a return path would always be set for a "successful" delivery. In this
990 case, the whole delivery is bypassed as an optimization, and therefore no
991 return path is set.
992
99321. Internal re-arrangement: the function for sending a challenge and reading
994 a response while authentication was assuming a zero-terminated challenge
995 string. It's now changed to take a pointer and a length, to allow for
996 binary data in such strings.
997
99822. Added the cyrus_sasl authenticator (code supplied by MBM).
999
100023. Exim was not respecting finduser_retries when seeking the login of the
1001 uid under which it was called; it was always trying 10 times. (The default
1002 setting of finduser_retries is zero.) Also, it was sleeping after the final
1003 failure, which is pointless.
1004
100524. Implemented tls_on_connect_ports.
1006
100725. Implemented acl_smtp_predata.
1008
100926. If the domain in control=submission is set empty, Exim assumes that the
1010 authenticated id is a complete email address when it generates From: or
1011 Sender: header lines.
1012
101327. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1014 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1015 chown and chgrp in /bin and hostname in /usr/bin.
1016
101728. Exim was keeping the "process log" file open after each use, just as it
1018 does for the main log. This opens the possibility of it remaining open for
1019 long periods when the USR1 signal hits a daemon. Occasional processlog
1020 errors were reported, that could have been caused by this. Anyway, it seems
1021 much more sensible not to leave this file open at all, so that is what now
1022 happens.
1023
102429. The long-running daemon process does not normally write to the log once it
1025 has entered its main loop, and it closes the log before doing so. This is
1026 so that log files can straightforwardly be renamed and moved. However,
1027 there are a couple of unusual error situations where the daemon does write
1028 log entries, and I had neglected to close the log afterwards.
1029
103030. The text of an SMTP error response that was received during a remote
1031 delivery was being truncated at 512 bytes. This is too short for some of
1032 the long messages that one sometimes sees. I've increased the limit to
1033 1024.
1034
103531. It is now possible to make retry rules that apply only when a message has a
1036 specific sender, in particular, an empty sender.
1037
103832. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1039 it possible to be selective about when SMTP synchronization is enforced.
1040
104133. Added "control = caseful_local_part" and "control = "caselower_local_part".
1042
104332. Implemented hosts_connection_nolog.
1044
104533. Added an ACL for QUIT.
1046
104734. Setting "delay_warning=" to disable warnings was not working; it gave a
1048 syntax error.
1049
105035. Added mailbox_size and mailbox_filecount to appendfile.
1051
105236. Added control = no_multiline_responses to ACLs.
1053
105437. There was a bug in the logic of the code that waits for the clock to tick
1055 in the case where the clock went backwards by a substantial amount such
1056 that the microsecond fraction of "now" was more than the microsecond
1057 fraction of "then" (but the whole seconds number was less).
1058
105938. Added support for the libradius Radius client library this is found on
1060 FreeBSD (previously only the radiusclient library was supported).
1061
1062
1063Exim version 4.42
1064-----------------
1065
1066 1. When certain lookups returned multiple values in the form name=value, the
1067 quoting of the values was not always being done properly. Specifically:
1068 (a) If the value started with a double quote, but contained no whitespace,
1069 it was not quoted.
1070 (b) If the value contained whitespace other than a space character (i.e.
1071 tabs or newlines or carriage returns) it was not quoted.
1072 This fix has been applied to the mysql and pgsql lookups by writing a
1073 separate quoting function and calling it from the lookup code. The fix
1074 should probably also be applied to nisplus, ibase and oracle lookups, but
1075 since I cannot test any of those, I have not disturbed their existing code.
1076
1077 2. A hit in the callout cache for a specific address caused a log line with no
1078 reason for rejecting RCPT. Now it says "Previous (cached) callout
1079 verification failure".
1080
1081 3. There was an off-by-one bug in the queryprogram router. An over-long
1082 return line was truncated at 256 instead of 255 characters, thereby
1083 overflowing its buffer with the terminating zero. As well as fixing this, I
1084 have increased the buffer size to 1024 (and made a note to document this).
1085
1086 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1087 when Exim is waiting for an SMTP response from a remote server, Exim
1088 restarts its select() call on the socket, thereby resetting its timeout.
1089 This is not a problem when such interrupts are rare. Somebody set up a cron
1090 job to run exiwhat every 2 minutes, which is less than the normal select()
1091 timeout (5 or 10 minutes). This meant that the select() timeout never
1092 kicked in because it was always reset. I have fixed this by comparing the
1093 time when an interrupt arrives with the time at the start of the first call
1094 to select(). If more time than the timeout has elapsed, the interrupt is
1095 treated as a timeout.
1096
1097 5. Some internal re-factoring in preparation for the addition of Sieve
1098 extensions (by MH). In particular, the "personal" test is moved to a
1099 separate function, and given an option for scanning Cc: and Bcc: (which is
1100 not set for Exim filters).
1101
1102 6. When Exim created an email address using the login of the caller as the
1103 local part (e.g. when creating a From: or Sender: header line), it was not
1104 quoting the local part when it contained special characters such as @.
1105
1106 7. Installed new OpenBSD configuration files.
1107
1108 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1109 try to make them clearer.
1110
1111 9. Callout options, other than the timeout value, were being ignored when
1112 verifying sender addresses in header lines. For example, when using
1113
1114 verify = header_sender/callout=no_cache
1115
1116 the cache was (incorrectly) being used.
1117
111810. Added a missing instance of ${EXE} to the exim_install script; this affects
1119 only the Cygwin environment.
1120
112111. When return_path_on_delivery was set as a log selector, if different remote
1122 addresses in the same message used different return paths and parallel
1123 remote delivery occurred, the wrong values would sometimes be logged.
1124 (Whenever a remote delivery process finished, the return path value from
1125 the most recently started remote delivery process was logged.)
1126
112712. RFC 3848 specifies standard names for the "with" phrase in Received: header
1128 lines when AUTH and/or TLS are in use. This is the "received protocol"
1129 field. Exim used to use "asmtp" for authenticated SMTP, without any
1130 indication (in the protocol name) for TLS use. Now it follows the RFC and
1131 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1132 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1133 names appear in log lines as well as in Received: header lines.
1134
113513. Installed MH's patches for Sieve to add the "copy" and "vacation"
1136 extensions, and comparison tests, and to fix some bugs.
1137
113814. Changes to the "personal" filter test:
1139
1140 (1) The test was buggy in that it was just doing the equivalent of
1141 "contains" tests on header lines. For example, if a user's address was
1142 anne@some.where, the "personal" test would incorrectly be true for
1143
1144 To: susanne@some.where
1145
1146 This test is now done by extracting each address from the header in turn,
1147 and checking the entire address. Other tests that are part of "personal"
1148 are now done using regular expressions (for example, to check local parts
1149 of addresses in From: header lines).
1150
1151 (2) The list of non-personal local parts in From: addresses has been
1152 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1153 taken from the Sieve specification recommendations.
1154
1155 (3) If the message contains any header line starting with "List-" it is
1156 treated as non-personal.
1157
1158 (4) The test for "circular" in the Subject: header line has been removed
1159 because it now seems ill-conceived.
1160
116115. Minor typos in src/EDITME comments corrected.
1162
116316. Installed latest exipick from John Jetmore.
1164
116517. If headers_add on a router specified a text string that was too long for
1166 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1167 of string_sprintf() is now avoided.
1168
116918. $message_body_size was not set (it was always zero) when running the DATA
1170 ACL and the local_scan() function.
1171
117219. For the "mail" command in an Exim filter, no default was being set for
1173 the once_repeat time, causing a random time value to be used if "once" was
1174 specified. (If the value happened to be <= 0, no repeat happened.) The
1175 default is now 0s, meaning "never repeat". The "vacation" command was OK
1176 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1177 (I found it when inspecting the code).
1178
117920. There is now an overall timeout for performing a callout verification. It
1180 defaults to 4 times the callout timeout, which applies to individual SMTP
1181 commands during the callout. The overall timeout applies when there is more
1182 than one host that can be tried. The timeout is checked before trying the
1183 next host. This prevents very long delays if there are a large number of
1184 hosts and all are timing out (e.g. when the network connections are timing
1185 out). The value of the overall timeout can be changed by specifying an
1186 additional sub-option for "callout", called "maxwait". For example:
1187
1188 verify = sender/callout=5s,maxwait=20s
1189
119021. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1191 to the end before writing, but this should make it even safer).
1192
119322. Exim was forgetting that it had advertised PIPELINING for the second and
1194 subsequent messages on an SMTP connection. It was also not resetting its
1195 memory on STARTTLS and an internal HELO.
1196
119723. When Exim logs an SMTP synchronization error within a session, it now
1198 records whether PIPELINING has been advertised or not.
1199
120024. Added 3 instances of "(long int)" casts to time_t variables that were being
1201 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1202 rather than long int.
1203
120425. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1205
120626. Added the never_mail option to autoreply.
1207
1208
1209Exim version 4.41
1210-----------------
1211
1212 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1213 crash if the getsockname() call failed; this can happen if a connection is
1214 closed very soon after it is established. The problem was simply in the
1215 order in which certain operations were done, causing Exim to try to write
1216 to the SMTP stream before it had set up the file descriptor. The bug has
1217 been fixed by making things happen in the correct order.
1218
1219
1220Exim version 4.40
1221-----------------
1222
1223 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1224 before the connection was closed, thus losing the rejection response.
1225
1226 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1227 some early Solaris releases, but causes trouble in current releases where
1228 socklen_t is defined.
1229
1230 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1231 always exist.
1232
1233 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1234 configured.
1235
1236 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1237 that releasing the top of it at the end releases what was used for sub-
1238 expansions (unless the block got too big). However, discard this block if
1239 the first thing is a variable or header, so that we can use its block when
1240 it is dynamic (useful for very large $message_headers, for example).
1241
1242 6. Lookups now cache *every* query, not just the most recent. A new, separate
1243 store pool is used for this. It can be recovered when all lookup caches are
1244 flushed. Lookups now release memory at the end of their result strings.
1245 This has involved some general refactoring of the lookup sources.
1246
1247 7. Some code has been added to the store_xxx() functions to reduce the amount
1248 of flapping under certain conditions.
1249
1250 8. log_incoming_interface used to affect only the <= reception log lines. Now
1251 it causes the local interface and port to be added to several more SMTP log
1252 lines, for example "SMTP connection from", and rejection lines.
1253
1254 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
1255
125610. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
1257
125811. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1259 could be overwritten at the end of the current message (or the start of a
1260 new message if it was set in a HELO ACL). The value is now preserved for
1261 the duration of the SMTP connection.
1262
126312. If a transport had a headers_rewrite setting, and a matching header line
1264 contained an unqualified address, that address was qualified, even if it
1265 did not match any rewriting rules. The underlying bug was that the values
1266 of the flags that permit the existence of unqualified sender and recipient
1267 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1268 non-local messages, and by -bnq for local messages) were not being
1269 preserved with the message after it was received.
1270
127113. When Exim was logging an SMTP synchronization error, it could sometimes log
1272 "next input=" as part of the text comprising the host identity instead of
1273 the correct text. The code was using the same buffer for two different
1274 strings. However, depending on which order the printing function evaluated
1275 its arguments, the bug did not always show up. Under Linux, for example, my
1276 test suite worked just fine.
1277
127814. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1279 doesn't work with some older versions of Perl. It has been changed to "my",
1280 which in any case is probably the better facility to use.
1281
128215. A really picky compiler found some instances of statements for creating
1283 error messages that either had too many or two few arguments for the format
1284 string.
1285
128616. The size of the buffer for calls to the DNS resolver has been increased
1287 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1288 for addresses that have a lot of PTR records. This alleviates a problem; it
1289 does not fully solve it.
1290
129117. A dnsdb lookup for PTR records that receives more data than will fit in the
1292 buffer now truncates the list and logs the incident, which is the same
1293 action as happens when Exim is looking up a host name and its aliases.
1294 Previously in this situation something unpredictable would happen;
1295 sometimes it was "internal error: store_reset failed".
1296
129718. If a server dropped the connection unexpectedly when an Exim client was
1298 using GnuTLS and trying to read a response, the client delivery process
1299 crashed while trying to generate an error log message.
1300
130119. If a "warn" verb in an ACL added multiple headers to a message in a single
1302 string, for example:
1303
1304 warn message = H1: something\nH2: something
1305
1306 the text was added as a single header line from Exim's point of view
1307 though it ended up OK in the delivered message. However, searching for the
1308 second and subsequent header lines using $h_h2: did not work. This has been
1309 fixed. Similarly, if a system filter added multiple headers in this way,
1310 the routers could not see them.
1311
131220. Expanded the error message when iplsearch is called with an invalid key to
1313 suggest using net-iplsearch in a host list.
1314
131521. When running tests using -bh, any delays imposed by "delay" modifiers in
1316 ACLs are no longer actually imposed (and a message to that effect is
1317 output).
1318
131922. If a "gecos" field in a passwd entry contained escaped characters, in
1320 particular, if it contained a \" sequence, Exim got it wrong when building
1321 a From: or a Sender: header from that name. A second bug also caused
1322 incorrect handling when an unquoted " was present following a character
1323 that needed quoting.
1324
132523. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1326 was not being matched caselessly.
1327
132824. Arranged for all hyphens in the exim.8 source to be escaped with
1329 backslashes.
1330
133125. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1332 properly. Recipient callout cache records were still being keyed to include
1333 the sender, even when use_sender was set false. This led to far more
1334 callouts that were necessary. The sender is no longer included in the key
1335 when use_sender is false.
1336
133726. Added "control = submission" modifier to ACLs.
1338
133927. Added the ${base62d: operator to decode base 62 numbers.
1340
134128. dnsdb lookups can now access SRV records.
1342
134329. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1344 the configuration file.
1345
134630. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1347 (-v) mode. This makes the output for a verbose queue run more intelligible.
1348
134931. Added a use_postmaster feature to recipient callouts.
1350
135132. Added the $body_zerocount variable, containing the number of binary zero
1352 bytes in the message body.
1353
135433. The time of last modification of the "new" subdirectory is now used as the
1355 "mailbox time last read" when there is a quota error for a maildir
1356 delivery.
1357
135834. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
1359
136035. Added +ignore_unknown as a special item in host lists.
1361
136236. Code for decoding IPv6 addresses in host lists is now included, even if
1363 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1364 address was recognized as an IP address, but was then not correctly decoded
1365 into binary, causing unexpected and incorrect effects when compared with
1366 another IP address.
1367
1368
1369Exim version 4.34
1370-----------------
1371
1372 1. Very minor rewording of debugging text in manualroute to say "list of
1373 hosts" instead of "hostlist".
1374
1375 2. If verify=header_syntax was set, and a header line with an unqualified
1376 address (no domain) and a large number of spaces between the end of the
1377 name and the colon was received, the reception process suffered a buffer
1378 overflow, and (when I tested it) crashed. This was caused by some obsolete
1379 code that should have been removed. The fix is to remove it!
1380
1381 3. When running in the test harness, delay a bit after writing a bounce
1382 message to get a bit more predictability in the log output.
1383
1384 4. Added a call to search_tidyup() just before forking a reception process. In
1385 theory, someone could use a lookup in the expansion of smtp_accept_max_
1386 per_host which, without the tidyup, could leave open a database connection.
1387
1388 5. Added the variables $recipient_data and $sender_data which get set from a
1389 lookup success in an ACL "recipients" or "senders" condition, or a router
1390 "senders" option, similar to $domain_data and $local_part_data.
1391
1392 6. Moved the writing of debug_print from before to after the "senders" test
1393 for routers.
1394
1395 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1396 problems for message scanning, either using a data ACL, or using
1397 local_scan() because the Received: header was not generated till after they
1398 were called (in order to set the time as the time of reception completion).
1399 I have revised the way this works. The header is now generated after the
1400 body is received, but before the ACL or local_scan() are called. After they
1401 are run, the timestamp in the header is updated.
1402
1403
1404Exim version 4.33
1405-----------------
1406
1407 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1408 before starting a queue runner without re-exec. This happened only when
1409 deliver_drop_privilege was set or when the Exim user was set to root. The
1410 effect of the bug was that timeouts during subsequent deliveries caused
1411 crashes instead of being properly handled. The handler is now left at its
1412 default (and expected) setting.
1413
1414 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1415 message, again when deliver_drop_privilege is set or Exim is run as root.
1416 The bug described in (1) was not present in this case, but the tidying up
1417 of the other signals was missing. I have made the two cases consistent.
1418
1419 3. The ignore_target_hosts setting on a manualroute router was being ignored
1420 for hosts that were looked up using the /MX notation.
1421
1422 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1423 in domain lists.
1424
1425 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1426 operated on the sender address. After changing the $sender_address to <>
1427 for the sender address verify, Exim was re-instated it as the original
1428 (before rewriting) address, but remembering that it had rewritten it, so it
1429 wasn't rewriting it again. This bug also had the effect of breaking the
1430 sender address verification caching when the sender address was rewritten.
1431
1432 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1433 This has been changed so that if the ip literal address matches
1434 ignore_target_hosts, the router declines.
1435
1436 7. Added expansion conditions match_domain, match_address, and match_local_
1437 part (NOT match_host).
1438
1439 8. The placeholder for the Received: header didn't have a length field set.
1440
1441 9. Added code to Exim itself and to exim_lock to test for a specific race
1442 condition that could lead to file corruption when using MBX delivery. The
1443 issue is with the lockfile that is created in /tmp. If this file is removed
1444 after a process has opened it but before that process has acquired a lock,
1445 there is the potential for a second process to recreate the file and also
1446 acquire a lock. This could lead to two Exim processes writing to the file
1447 at the same time. The added code performs the same test as UW imapd; it
1448 checks after acquiring the lock that its file descriptor still refers to
1449 the same named file.
1450
145110. The buffer for building added header lines was of fixed size, 8192 bytes.
1452 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1453 when Exim is built.
1454
145511. Added the smtp_active_hostname option. If used, this will typically be made
1456 to depend on the incoming interface address. Because $interface_address is
1457 not set up until the daemon has forked a reception process, error responses
1458 that can happen earlier (such as "too many connections") no longer contain
1459 a host name.
1460
146112. If an expansion in a condition on a "warn" statement fails because a lookup
1462 defers, the "warn" statement is abandoned, and the next ACL statement is
1463 processed. Previously this caused the whole ACL to be aborted.
1464
146513. Added the iplsearch lookup type.
1466
146714. Added ident_timeout as a log selector.
1468
146915. Added tls_certificate_verified as a log selector.
1470
147116. Added a global option tls_require_ciphers (compare the smtp transport
1472 option of the same name). This controls incoming TLS connections.
1473
147417. I finally figured out how to make tls_require_ciphers do a similar thing
1475 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
1476 before starting the TLS session.
1477
147818. Tabs are now shown as \t in -bP output.
1479
148019. If the log selector return_path_on_delivery was set, Exim crashed when
1481 bouncing a message because it had too many Received: header lines.
1482
148320. If two routers both had headers_remove settings, and the first one included
1484 a superfluous trailing colon, the final name in the first list and the
1485 first name in the second list were incorrectly joined into one item (with a
1486 colon in the middle).
1487
1488
1489Exim version 4.32
1490-----------------
1491
1492 1. Added -C and -D options to the exinext utility, mainly to make it easier
1493 to include in the automated testing, but these could be helpful when
1494 multiple configurations are in use.
1495
1496 2. The exinext utility was not formatting the output nicely when there was
1497 an alternate port involved in the retry record key, nor when there was a
1498 message id as well (for retries that were specific to a specific message
1499 and a specific host). It was also confused by IPv6 addresses, because of
1500 the additional colons they contain. I have fixed the IPv4 problem, and
1501 patched it up to do a reasonable job for IPv6.
1502
1503 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
1504 delivery, the log line now contains "pipelined" if PIPELINING was used.
1505
1506 4. An SMTP transport process used to panic and die if the bind() call to set
1507 an explicit outgoing interface failed. This has been changed; it is now
1508 treated in the same way as a connect() failure.
1509
1510 5. A reference to $sender_host_name in the part of a conditional expansion
1511 that was being skipped was still causing a DNS lookup. This no longer
1512 occurs.
1513
1514 6. The def: expansion condition was not recognizing references to header lines
1515 that used bh_ and bheader_.
1516
1517 7. Added the _cache feature to named lists.
1518
1519 8. The code for checking quota_filecount in the appendfile transport was
1520 allowing one more file than it should have been.
1521
1522 9. For compatibility with Sendmail, the command line option
1523
1524 -prval:sval
1525
1526 is equivalent to
1527
1528 -oMr rval -oMs sval
1529
1530 and sets the incoming protocol and host name (for trusted callers). The
1531 host name and its colon can be omitted when only the protocol is to be set.
1532 Note the Exim already has two private options, -pd and -ps, that refer to
1533 embedded Perl. It is therefore impossible to set a protocol value of "d" or
1534 "s", but I don't think that's a major issue.
1535
153610. A number of refactoring changes to the code, none of which should affect
1537 Exim's behaviour:
1538
1539 (a) The number of logging options was getting close to filling up the
1540 32-bit word that was used as a bit map. I have split them into two classes:
1541 those that are passed in the argument to log_write(), and those that are
1542 only ever tested independently outside of that function. These are now in
1543 separate 32-bit words, so there is plenty of room for expansion again.
1544 There is no change in the user interface or the logging behaviour.
1545
1546 (b) When building, for example, log lines, the code previously used a
1547 macro that called string_cat() twice, in order to add two strings. This is
1548 not really sufficiently general. Furthermore, there was one instance where
1549 it was actually wrong because one of the argument was used twice, and in
1550 one call a function was used. (As it happened, calling the function twice
1551 did not affect the overall behaviour.) The macro has been replaced by a
1552 function that can join an arbitrary number of extra strings onto a growing
1553 string.
1554
1555 (c) The code for expansion conditions now uses a table and a binary chop
1556 instead of a serial search (which was left over from when there were very
1557 few conditions). Also, it now recognizes conditions like "pam" even when
1558 the relevant support is not compiled in: a suitably worded error message is
1559 given if an attempt is made to use such a condition.
1560
156111. Added ${time_interval:xxxxx}.
1562
156312. A bug was causing one of the ddress fields not to be passed back correctly
1564 from remote delivery subprocesses. The field in question was not being
1565 subsequently used, so this caused to problems in practice.
1566
156713. Added new log selectors queue_time and deliver_time.
1568
156914. Might have fixed a bug in maildirsizefile handling that threw up
1570 "unexpected character" debug warnings, and recalculated the data
1571 unnecessarily. In any case, I expanded the warning message to give more
1572 information.
1573
157415. Added the message "Restricted characters in address" to the statements in
1575 the default ACL that block characters like @ and % in local parts.
1576
157716. Change 71 for release 4.31 proved to be much less benign that I imagined.
1578 Three changes have been made:
1579
1580 (a) There was a serious bug; a negative response to MAIL caused the whole
1581 recipient domain to be cached as invalid, thereby blocking all messages
1582 to all local parts at the same domain, from all senders. This bug has
1583 been fixed. The domain is no longer cached after a negative response to
1584 MAIL if the sender used is not empty.
1585
1586 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
1587 been restored.
1588
1589 (c) A new callout option, "use_sender" has been added for people who want
1590 the modified behaviour.
1591
1592
1593Exim version 4.31
1594-----------------
1595
1596 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
1597 Larry Rosenman.
1598
1599 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
1600 indeed breaks things for older releases.
1601
1602 3. Added additional logging to the case where there is a problem reading data
1603 from a filter that is running in a subprocess using a pipe, in order to
1604 try to track down a specific problem.
1605
1606 4. Testing facility fudge: when running in the test harness and attempting
1607 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
1608 getting "No route to host". Convert this to a timeout.
1609
1610 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
1611 warning.
1612
1613 6. Some OS don't have socklen_t but use size_t instead. This affects the
1614 fifth argument of getsockopt() amongst other things. This is now
1615 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
1616 can be set for individual OS. I have set it for SunOS5, OSF1, and
1617 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
1618 some earlier ones do not.
1619
1620 7. Change 4.30/15 was not doing the test caselessly.
1621
1622 8. The standard form for an IPv6 address literal was being rejected by address
1623 parsing in, for example, MAIL and RCPT commands. An example of this kind of
1624 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
1625 this, as well as the form without the "IPv6" on the front (but only when
1626 address literals are enabled, of course).
1627
1628 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
1629
163010. Exim crashed if a message with an empty sender address specified by -f
1631 encountered a router with an errors_to setting. This could be provoked only
1632 by a command such as
1633
1634 exim -f "" ...
1635
1636 where an empty string was supplied; "<>" did not hit this bug.
1637
163811. Installed PCRE release 4.5.
1639
164012. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
1641 remained set. It is now erased.
1642
164313. exiqgrep wasn't working on MacOS X because it didn't correctly compute
1644 times from message ids (which are base 36 rather than the normal 62).
1645
164614. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
1647 were being counted as actual protocol errors, and logged if the log
1648 selector +smtp_protocol_error was set. One cannot be perfect in this test,
1649 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
1650 and DATA following a set of rejected RCPTs do not count as protocol errors.
1651 In other words, Exim assumes they were pipelined, though this may not
1652 actually be the case. Of course, in all cases the client gets an
1653 appropriate error code.
1654
165515. If a lookup fails in an ACL condition, a message about the failure may
1656 be available; it is used if testing the ACL cannot continue, because most
1657 such messages specify what the cause of the deferral is. However, some
1658 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
1659 that caused an old message to be retained and used if a later statement
1660 caused a defer, replacing the real cause of the deferral.
1661
166216. If an IP address had so many PTR records that the DNS lookup buffer
1663 was not large enough to hold them, Exim could crash while trying to process
1664 the truncated data. It now detects and logs this case.
1665
166617. Further to 4.21/58, another change has been made: if (and only if) the
1667 first line of a message (the first header line) ends with CRLF, a bare LF
1668 in a subsequent header line has a space inserted after it, so as not to
1669 terminate the header.
1670
167118. Refactoring: tidied an ugly bit of code in appendfile that copied data
1672 unnecessarily, used atoi() instead of strtol(), and didn't check the
1673 termination when getting file sizes from file names by regex.
1674
167519. Completely re-implemented the support for maildirsize files, in the light
1676 of a number of problems with the previous contributed implementation
1677 (4.30/29). In particular:
1678
1679 . If the quota is zero, the maildirsize file is maintained, but no quota is
1680 imposed.
1681
1682 . If the maildir directory does not exist, it is created before any attempt
1683 to write a maildirsize file.
1684
1685 . The quota value in the file is just a cache; if the quota is changed in
1686 the transport, the new value overrides.
1687
1688 . A regular expression is available for excluding directories from the
1689 count.
1690
169120. The autoreply transport checks the characters in options that define the
1692 message's headers; it allows continued headers, but it was checking with
1693 isspace() after an embedded newline instead of explicitly looking for a
1694 space or a tab.
1695
169621. If all the "regular" hosts to which an address was routed had passed their
1697 expiry times, and had not reached their retry times, the address was
1698 bounced, even if fallback hosts were defined. Now Exim should go on to try
1699 the fallback hosts.
1700
170122. Increased buffer sizes in the callout code from 1024 to 4096 to match the
1702 equivalent code in the SMTP transport. Some hosts send humungous responses
1703 to HELO/EHLO, more than 1024 it seems.
1704
170523. Refactoring: code in filter.c used (void *) for "any old type" but this
1706 gives compiler warnings in some environments. I've now done it "properly",
1707 using a union.
1708
170924. The replacement for inet_ntoa() that is used with gcc on IRIX systems
1710 (because of problems with the built-in one) was declared to return uschar *
1711 instead of char *, causing compiler failure.
1712
171325. Fixed a file descriptor leak when processing alias/forward files.
1714
171526. Fixed a minor format string issue in dbfn.c.
1716
171727. Typo in exim.c: ("dmbnz" for "dbmnz").
1718
171928. If a filter file refered to $h_xxx or $message_headers, and the headers
1720 contained RFC 2047 "words", Exim's memory could, under certain conditions,
1721 become corrupted.
1722
172329. When a sender address is verified, it is cached, to save repeating the test
1724 when there is more than one recipient in a message. However, when the
1725 verification involves a callout, it is possible for different callout
1726 options to be set for different recipients. It is too complicated to keep
1727 track of this in the cache, so now Exim always runs a verification when a
1728 callout is required, relying on the callout cache for the optimization.
1729 The overhead is duplication of the address routing, but this should not be
1730 too great.
1731
173230. Fixed a bug in callout caching. If a RCPT command caused the sender address
1733 to be verified with callout=postmaster, and the main callout worked but the
1734 postmaster check failed, the verification correctly failed. However, if a
1735 subsequent RCPT command asked for sender verification *without* the
1736 postmaster check, incorrect caching caused this verification also to fail,
1737 incorrectly.
1738
173931. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
1740 it was not caching the DNS options (qualify_single, search_parents) that
1741 were used when the lookup failed. A subsequent lookup with different
1742 options therefore always gave the same answer, though there were cases
1743 where it should not have. (Example: a "domains = !$mx_any" option on a
1744 dnslookup router: the "domains" option is always processed without any
1745 widening, but the router might have qualify_single set.) Now Exim uses the
1746 cached value only when the same options are set.
1747
174832. Added John Jetmore's "exipick" utility to the distribution.
1749
175033. GnuTLS: When an attempt to start a TLS session fails for any reason other
1751 than a timeout (e.g. a certificate is required, and is not provided), an
1752 Exim server now closes the connection immediately. Previously it waited for
1753 the client to close - but if the client is SSL, it seems that they each
1754 wait for each other, leading to a delay before one of them times out.
1755
175634: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
1757 maintained 0.8.x compatibility because I don't think many are using it, and
1758 it is clearly obsolete.
1759
176035. Added TLS support for CRLs: a tls_crl global option and one for the smtp
1761 transport.
1762
176336. OpenSSL: $tls_certificate_verified was being set to 1 even if the
1764 client certificate was expired. A simple patch fixes this, though I don't
1765 understand the full logic of why the verify callback is called multiple
1766 times.
1767
176837. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
1769 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
1770 which causes problems with some clients (such as the Certicom SSL Plus
1771 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
1772 disables the coutermeasure allowing Eudora to connect."
1773
177438. Exim was not checking that a write() to a log file succeeded. This could
1775 lead to Bad Things if a log got too big, in particular if it hit a file
1776 size limit. Exim now panics and dies if it cannot write to a log file, just
1777 as it does if it cannot open a log file.
1778
177939. Modified OS/Makefile-Linux so that it now contains
1780
1781 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
1782
1783 The two -D definitions ensure that Exim is compiled with large file
1784 support, which makes it possible to handle log files that are bigger than
1785 2^31.
1786
178740. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
1788 instance) a domain was checked against a named list that involved a lookup,
1789 causing $domain_data to be set, then another domain was checked against the
1790 same list, then the first domain was re-checked, the value of $domain_data
1791 after the final check could be wrong. In particular, if the second check
1792 failed, it could be set empty. This bug probably also applied to
1793 $localpart_data.
1794
179541. The strip_trailing_dot option was not being applied to the address given
1796 with the -f command-line option.
1797
179842. The code for reading a message's header from the spool was incrementing
1799 $received_count, but never initializing it. This meant that the value was
1800 incorrect (doubled) while delivering a message in the same process in which
1801 it was received. In the most common configuration of Exim, this never
1802 happens - a fresh exec is done - but it can happen when
1803 deliver_drop_privilege is set.
1804
180543. When Exim logs an SMTP synchronization error - client data sent too soon -
1806 it now includes up to 150 characters of the unexpected data in the log
1807 line.
1808
180944. The exim_dbmbuild utility uses fixed size buffers for reading input lines
1810 and building data strings. The size of both of these buffers was 10 000
1811 bytes - far larger than anybody would *ever* want, thought I. Needless to
1812 say, somebody hit the limit. I have increased the maximum line length to
1813 20 000 and the maximum data length of concatenated lines to 100 000. I have
1814 also fixed two bugs, because there was no checking on these buffers. Tsk,
1815 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
1816 buffer is too small.
1817
181845. The exim_dbmbuild utility did not support quoted keys, as Exim does in
1819 lsearch lookups. Now it does.
1820
182146. When parsing a route_list item in a manualroute router, a fixed-length
1822 buffer was used for the list of hosts. I made this 1024 bytes long,
1823 thinking that nobody would ever have a list of hosts that long. Wrong.
1824 Somebody had a whole pile of complicated expansion conditions, and the
1825 string was silently truncated, leading to an expansion error. It turns out
1826 that it is easier to change to an unlimited length (owing to other changes
1827 that have happened since this code was originally written) than to build
1828 structure for giving a limitation error. The length of the item that
1829 expands into the list of hosts is now unlimited.
1830
183147. The lsearch lookup could not handle data where the length of text line was
1832 more than 4095 characters. Such lines were truncated, leading to shortened
1833 data being returned. It should now handle lines of any length.
1834
183548. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
1836 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
1837 ACL").
1838
183949. Cosmetic tidy to scripts like exicyclog that are generated by globally
1840 replacing strings such as BIN_DIRECTORY in a source file: the replacement
1841 no longer happens in comment lines. A list of replacements is now placed
1842 at the head of all of the source files, except those whose only change is
1843 to replace PERL_COMMAND in the very first #! line.
1844
184550. Replaced the slow insertion sort in queue.c, for sorting the list of
1846 messages on the queue, with a bottom-up merge sort, using code contributed
1847 by Michael Haardt. This should make operations like -bp somewhat faster on
1848 large queues. It won't affect queue runners, except when queue_run_in_order
1849 is set.
1850
185151. Installed eximstats 1.31 in the distribution.
1852
185352. Added support for SRV lookups to the dnslookup router.
1854
185553. If an ACL referred to $message_body or $message_body_end, the value was not
1856 reset for any messages that followed in the same SMTP session.
1857
185854. The store-handling optimization for building very long strings was not
1859 differentiating between the different store pools. I don't think this
1860 actually made any difference in practice, but I've tidied it.
1861
186255. While running the routers to verify a sender address, $sender_address
1863 was still set to the sender address. This is wrong, because when routing to
1864 send a bounce to the sender, it would be empty. Therefore, I have changed
1865 it so that, while verifying a sender address, $sender_address is set to <>.
1866 (There is no change to what happens when verifying a recipient address.)
1867
186856. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
1869 target A or AAAA records (if not already returned) without resetting the
1870 qualify_single or search_parents options of the DNS resolver. These are
1871 inappropriate in this case because the targets of MX and SRV records must
1872 be FQDNs. A broken DNS record could cause trouble if it happened to have a
1873 target that, when qualified, matched something in the local domain. These
1874 two options are now turned off when doing these lookups.
1875
187657. It seems that at least some releases of Reiserfs (which does not have the
1877 concept of a fixed number of inodes) returns zero and not -1 for the
1878 number of available inodes. This interacted badly with check_spool_inodes,
1879 which assumed that -1 was the "no such thing" setting. What I have done is
1880 to check that the total number of inodes is greater than zero before doing
1881 the test of how many are available.
1882
188358. When a "warn" ACL statement has a log_message modifier, the message is
1884 remembered, and not repeated. This is to avoid a lot of repetition when a
1885 message has many recipients that cause the same warning to be written.
1886 Howewer, Exim was preserving the list of already written lines for an
1887 entire SMTP session, which doesn't seem right. The memory is now reset if a
1888 new message is started.
1889
189059. The "rewrite" debugging flag was not showing the result of rewriting in the
1891 debugging output unless log_rewrite was also set.
1892
189360. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
1894 of (int)(handle) when we know that handle contains (void *)(-1).
1895
189661. The Exim daemon panic-logs an error return when it closes the incoming
1897 connection. However "connection reset by peer" seems to be common, and
1898 isn't really an error worthy of noting specially, so that particular error
1899 is no long logged.
1900
190162. When Exim is trying to find all the local interfaces, it used to panic and
1902 die if the ioctl to get the interface flags failed. However, it seems that
1903 on at least one OS (Solaris 9) it is possible to have an interface that is
1904 included in the list of interfaces, but for which you get a failure error
1905 for this call. This happens when the interface is not "plumbed" into a
1906 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
1907 failure of the "get flags" call assumes that the interface is down.
1908
190963. Added a ${eval10: operator, which assumes all numbers are decimal. This
1910 makes life easier for people who are doing arithmetic on fields extracted
1911 from dates, where you often get leading zeros that should not be
1912 interpreted as octal.
1913
191464. Added qualify_domain to the redirect router, to override the global
1915 setting.
1916
191765. If a pathologically long header line contained very many addresses (the
1918 report of this problem mentioned 10 000) and each of them was rewritten,
1919 Exim could use up a very large amount of memory. (It kept on making new
1920 copies of the header line as it rewrote, and never released the old ones.)
1921 At the expense of a bit more processing, the header rewriting function has
1922 been changed so that it no longer eats memory in this way.
1923
192466. The generation of the Received: header has been moved from the time that a
1925 message starts to be received, to the time that it finishes. The timestamp
1926 in the Received: header should now be very close to that of the <= log
1927 line. There are two side-effects of this change:
1928
1929 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
1930 logged header lines no longer include the local Received: line, because
1931 it has not yet been created. The same applies to a copy of the message
1932 that is returned to a non-SMTP sender when a message is rejected.
1933
1934 (b) When a filter file is tested using -bf, no additional Received: header
1935 is added to the test message. After some thought, I decided that this
1936 is a bug fix.
1937
1938 This change does not affect the value of $received_for. It is still set
1939 after address rewriting, but before local_scan() is called.
1940
194167. Installed the latest Cygwin-specific files from the Cygwin maintainer.
1942
194368. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
1944 gave an unhelpful panic error message, and a defer error. I have managed to
1945 change this behaviour so that it now rejects any supplied certificate,
1946 which seems right, as the list of acceptable certificates is empty.
1947
194869. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
1949 gave an unhelpful defer error. I have not managed to make this reject any
1950 supplied certificates, but the error message it gives is "no certificate
1951 supplied", which is not helpful.
1952
195370. exigrep's output now also includes lines that are not associated with any
1954 message, but which match the given pattern. Implemented by a patch from
1955 Martin Sluka, which also tidied up the Perl a bit.
1956
195771. Recipient callout verification, like sender verification, was using <> in
1958 the MAIL FROM command. This isn't really the right thing, since the actual
1959 sender may affect whether the remote host accepts the recipient or not. I
1960 have changed it to use the actual sender in the callout; this means that
1961 the cache record is now keyed on a recipient/sender pair, not just the
1962 recipient address. There doesn't seem to be a real danger of callout loops,
1963 since a callout by the remote host to check the sender would use <>.
1964 [SEE ABOVE: changed after hitting problems.]
1965
196672. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
1967 temporary errors. However, in the case of such a code being given after
1968 the end of a data transmission (i.e. after ".") Exim was failing to write
1969 a retry record for the message. (Yes, there was some broken host that was
1970 actually sending 8xx at this point.)
1971
197273. An unknown lookup type in a host list could cause Exim to panic-die when
1973 the list was checked. (An example that provoked this was putting <; in the
1974 middle of a list instead of at the start.) If this happened during a DATA
1975 ACL check, a -D file could be left lying around. This kind of configuration
1976 error no longer causes Exim to die; instead it causes a defer errror. The
1977 incident is still logged to the main and panic logs.
1978
197974. Buglet left over from Exim 3 conversion. The message "too many messages
1980 in one connection" was written to the rejectlog but not the mainlog, except
1981 when address rewriting (yes!) was being logged.
1982
198375. Added write_rejectlog option.
1984
198576. When a system filter was run not as root (that is, when system_filter_user
1986 was set), the values of the $n variables were not being returned to the
1987 main process; thus, they were not subsequently available in the $sn
1988 variables.
1989
199077. Added +return_path_on_delivery log selector.
1991
199278. A connection timeout was being treated differently from recipients deferred
1993 when testing hosts_max_try with a message that was older than the host's
1994 retry timeout. (The host should not be counted, thus allowing all hosts to
1995 be tried at least once before bouncing.) This may have been the cause of an
1996 occasionally reported bug whereby a message would remain on the queue
1997 longer than the retry timeout, but would be bounced if a delivery was
1998 forced. I say "may" because I never totally pinned down the problem;
1999 setting up timeout/retry tests is difficult. See also the next item.
2000
200179. The ultimate address timeout was not being applied to errors that involved
2002 a combination of host plus message (for example, a timeout on a MAIL
2003 command). When an address resolved to a number of possible hosts, and they
2004 were not all tried for each delivery (e.g. because of hosts_max_try), a
2005 message could remain on the queue longer than the retry timeout.
2006
200780. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2008 Haardt.
2009
201081. Fixed an obscure SMTP outgoing bug which required at least the following
2011 conditions: (a) there was another message waiting for the same server;
2012 (b) the server returned 5xx to all RCPT commands in the first message so
2013 that the message was not completed; (c) the server dropped the connection
2014 or gave a negative response to the RSET that Exim sends to abort the
2015 transaction. The observed case was a dropped connection after DATA that had
2016 been sent in pipelining mode. That is, the server had advertised PIPELINING
2017 but was not implementing it correctly. The effect of the bug was incorrect
2018 behaviour, such as trying another host, and this could lead to a crash.
2019
2020
2021Exim version 4.30
2022-----------------
2023
2024 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2025 and daemon.c were passed as pointers to ints; they should have been
2026 pointers to socklen_t variables (which are typically unsigned ints).
2027
2028 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2029 fixed.
2030
2031 3. Fixed a really odd bug that affected only the testing scheme; patching a
2032 certain fixed string in the binary changed the value of another string that
2033 happened to be identical to the end of the original first string.
2034
2035 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2036 name", it returns that address as the IP address. On some operating
2037 systems (e.g. Solaris), it also passes back the IP address string as the
2038 "host name". However, on others (e.g. Linux), it passes back an empty
2039 string. Exim wasn't checking for this, and was changing the host name to an
2040 empty string, assuming it had been canonicized.
2041
2042 5. Although rare, it is permitted to have more than one PTR record for a given
2043 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2044 all the names associated with an address, because they do in Solaris.
2045 However, it seems that they do not in Linux for data that comes from the
2046 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2047 I found this out when I moved to a new Linux workstation and tried to run
2048 the Exim test suite.
2049
2050 To get round this problem I have changed the code so that it now does its
2051 own call to the DNS to look up PTR records when searching for a host name.
2052 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2053 addresses that are only in /etc/hosts are still found.
2054
2055 This behaviour is, however, controlled by an option called host_lookup_
2056 order, which defaults to "bydns:byaddr". If people want to use the other
2057 order, or indeed, just use one or the other means of lookup, they can
2058 specify it in this variable.
2059
2060 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2061 some operating systems, this comes back from gethostbyaddr() as an empty
2062 string, and this is what Exim used to test for. However, it seems that in
2063 other systems, "." is yielded. Exim now tests for this case too.
2064
2065 7. The values of check_spool_space and check_log_space are now held internally
2066 as a number of kilobytes instead of an absolute number of bytes. If a
2067 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2068 kilobyte. This means that much larger values can be stored.
2069
2070 8. Exim monitor: an attempt to get the action menu when not actually pointing
2071 at a message produces an empty menu entitled "No message selected". This
2072 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2073 no entries in it ("Shell widget menu has zero width and/or height"). So I
2074 have added a single, blank menu entry in this case.
2075
2076 9. Added ${quote_local_part.
2077
207810. MIME decoding is now applied to the contents of Subject: header lines when
2079 they are logged.
2080
208111. Now that a reference to $sender_host_address automatically causes a reverse
2082 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2083 host lookup before query-style lookups in lists that might use this
2084 variable. This has therefore been abolished, and the "net-" prefix is no
2085 longer necessary for query-style lookups.
2086
208712. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2088 have been a typo for LFLAGS, so it has been changed.
2089
209013. The install script calls Exim with "-C /dev/null" in order to find the
2091 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2092 to be output. Howeve, since Exim outputs its version number before the
2093 error, it didn't break the script. It just looked ugly. I fixed this by
2094 always allowing "-C /dev/null" if the caller is root.
2095
209614. Ignore overlarge ACL variable number when reading spool file - insurance
2097 against a later release with more variables having written the file.
2098
209915. The standard form for an IPv6 address literal was being rejected by EHLO.
2100 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2101 this, as well as the form without the "IPv6" on the front.
2102
210316. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2104 OS/Makefile-Darwin file.
2105
210617. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2107 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2108
210918. After change 4.21/52, "%ld" was used to format the contents of the $inode
2110 variable. However, some OS use ints for inodes. I've added cast to long int
2111 to get rid of the compiler warning.
2112
211319. I had forgotten to lock out "/../" in configuration file names when
2114 ALT_CONFIG_PREFIX was set.
2115
211620. Routers used for verification do not need to specify transports. However,
2117 if such a router generated a host list, and callout was configured, Exim
2118 crashed, because it could not find a port number from the (non-existent)
2119 transport. It now assumes port 25 in this circumstance.
2120
212121. Added the -t option to exigrep.
2122
212322. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2124 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2125 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2126 them is set, LOOKUP_LSEARCH is forced.
2127
212823. "exim -bV" now outputs a list of lookups that are included in the binary.
2129
213024. Added sender and host information to the "rejected by local_scan()" log
2131 line; previously there was no indication of these.
2132
213325. Added .include_if_exists.
2134
213526. Change 3.952/11 added an explicit directory sync on top of a file sync for
2136 Linux. It turns out that not all file systems support this. Apparently some
2137 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2138 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2139 not supported on the file descriptor, is now ignored when Exim is trying to
2140 sync a directory. This applies only to Linux.
2141
214227. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2143
214428. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2145 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2146 this.
2147
214829. Added support for maildirsize files from supplied patch (modified a bit).
2149
215030. The use of :fail: followed by an empty string could lead Exim to respond to
2151 sender verification failures with (e.g.):
2152
2153 550 Verification failed for <xxx>
2154 550 Sender verify failed
2155
2156 where the first response line was missing the '-' that indicates it is not
2157 the final line of the response.
2158
215931. The loop for finding the name of the user that called Exim had a hardwired
2160 limit of 10; it now uses the value of finduser_retries, which is used for
2161 all other user lookups.
2162
216332. Added $received_count variable, available in data and not_smtp ACLs, and at
2164 delivery time.
2165
216633. Exim was neglecting to zero errno before one call of strtol() when
2167 expanding a string and expecting an integer value. On some systems this
2168 resulted in spurious "integer overflow" errors. Also, it was casting the
2169 result into an int without checking.
2170
217134. Testing for a connection timeout using "timeout_connect" in the retry rules
2172 did not work. The code looks as if it has *never* worked, though it appears
2173 to have been documented since at least releast 1.62. I have made it work.
2174
217535. The "timeout_DNS" error in retry rules, also documented since at least
2176 1.62, also never worked. As it isn't clear exactly what this means, and
2177 clearly it isn't a major issue, I have abolished the feature by treating it
2178 as "timeout", and writing a warning to the main and panic logs.
2179
218036. The display of retry rules for -brt wasn't always showing the error code
2181 correctly.
2182
218337. Added new error conditions to retry rules: timeout_A, timeout_MX,
2184 timeout_connect_A, timeout_connect_MX.
2185
218638. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2187 to the empty sender.
2188
218939. The daemon was not analysing the content of -oX till after it had closed
2190 stderr and disconnected from the controlling terminal. This meant that any
2191 syntax errors were only noted on the panic log, and the return code from
2192 the command was 0. By re-arranging the code a little, I've made the
2193 decoding happen first, so such errors now appear on stderr, and the return
2194 code is 1. However, the actual setting up of the sockets still happens in
2195 the disconnected process, so errors there are still only recorded on the
2196 panic log.
2197
219840. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2199 connections (as happens on some IP stacks) was logged at start up time as
2200 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2201 it from "IPv6 and IPv4", which means that two separate sockets are being
2202 used.
2203
220441. The debug output for gethostbyname2() or getipnodebyname() failures now
2205 says whether AF_INET or AF_INET6 was passed as an argument.
2206
220742. Exiwhat output was messed up when time zones were included in log
2208 timestamps.
2209
221043. Exiwhat now gives more information about the daemon's listening ports,
2211 and whether -tls-on-connect was used.
2212
221344. The "port" option of the smtp transport is now expanded.
2214
221545. A "message" modifier in a "warn" statement in a non-message ACL was being
2216 silently ignored. Now an error message is written to the main and panic
2217 logs.
2218
221946. There's a new ACL modifier called "logwrite" which writes to a log file
2220 as soon as it is encountered.
2221
222247. Added $local_user_uid and $local_user_gid at routing time.
2223
222448. Exim crashed when trying to verify a sender address that was being
2225 rewritten to "<>".
2226
222749. Exim was recognizing only a space character after ".include". It now also
2228 recognizes a tab character.
2229
223050. Fixed several bugs in the Perl script that creates the exim.8 man page by
2231 extracting the relevant information from the specification. The man page no
2232 longer contains scrambled data for the -d option, and I've added a section
2233 at the front about calling Exim under different names.
2234
223551. Added "extra_headers" argument to the "mail" command in filter files.
2236
223752. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2238 crash.
2239
224053. Installed eximstats 1.29.
2241
224254. Added transport_filter_timeout as a generic transport option.
2243
224455. Exim no longer adds an empty Bcc: header to messages that have no To: or
2245 Cc: header lines. This was required by RFC 822, but it not required by RFC
2246 2822.
2247
224856. Exim used to add From:, Date:, and Message-Id: header lines to any
2249 incoming messages that did not have them. Now it does so only if the
2250 message originates locally, that is, if there is no associated remote host
2251 address. When Resent- header lines are present, this applies to the Resent-
2252 lines rather than the non-Resent- lines.
2253
225457. Drop incoming SMTP connection after too many syntax or protocol errors. The
2255 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
2256
225758. Messages for configuration errors now include the name of the main
2258 configuration file - useful now that there may be more than one file in a
2259 list (.included file names were always shown).
2260
226159. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2262 for those rare installations that do not start the daemon as root or run it
2263 setuid root. I've cut out the call to initgroups() if the daemon is not
2264 root at that time.
2265
226660. The Exim user and group can now be bound into the binary as text strings
2267 that are looked up at the start of Exim's processing.
2268
226961. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
2270
227162. Added $mailstore_basename variable.
2272
227363. Installed patch to sieve.c from Michael Haardt.
2274
227564. When Exim failed to open the panic log after failing to open the main log,
2276 the original message it was trying to log was written to stderr and debug
2277 output, but if they were not available (the usual case in production), it
2278 was lost. Now it is written to syslog before the two lines that record the
2279 failures to open the logs.
2280
228165. Users' Exim filters run in subprocesses under the user's uid. It is
2282 possible for a "deliver" command or an alias in a "personal" command to
2283 provoke an address rewrite. If logging of address rewriting is configured,
2284 this fails because the process is not running as root or exim. There may be
2285 a better way of dealing with this, but for the moment (because 4.30 needs
2286 to be released), I have disabled address rewrite logging when running a
2287 filter in a non-root, non-exim process.
2288
2289
2290Exim version 4.24
2291-----------------
2292
2293 1. The buildconfig auxiliary program wasn't quoting the value set for
2294 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2295 not defined. This bug was masked in 4.22 by the effect that was fixed in
2296 change 4.23/1.
2297
2298 2. Some messages that were rejected after a message id was allocated were
2299 shown as "incomplete" by exigrep. It no longer does this for messages that
2300 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2301
2302 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2303 have allow_domain_literals set, the ID did not get logged in the <= line.
2304 Domain literals are now always recognized in Message-ID: header lines.
2305
2306 4. The first argument for a ${extract expansion item is the key name or field
2307 number. Leading and trailing spaces in this item were not being ignored,
2308 causing some misleading effects.
2309
2310 5. When deliver_drop_privilege was set, single queue runner processes started
2311 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2312 same command in the process it spins off) were not dropping privilege.
2313
2314 6. When the daemon running as "exim" started a queue runner, it always
2315 re-executed Exim in the spun-off process. This is a waste of effort when
2316 deliver_drop_privilege is set. The new process now just calls the
2317 queue-runner function directly.
2318
2319
2320Exim version 4.23
2321-----------------
2322
2323 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2324 HEADERS_CHARSET.
2325
2326 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2327 ignored. Though the use of -oP was forcing the writing of a pid file, it
2328 was always written to the default place.
2329
2330 3. If the message "no IP address found for host xxxx" is generated during
2331 incoming verification, it is now followed by identification of the incoming
2332 connection (so you can more easily find what provoked it).
2333
2334 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2335
2336 5. Added some features to "harden" Exim a bit more against certain attacks:
2337
2338 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2339 be put in Local/Makefile. This is like the never_users runtime option,
2340 but it cannot be overridden. The default setting is "root".
2341
2342 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2343 prefix string with which any file named in a -C command line option
2344 must start.
2345
2346 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2347 is retained for -C and -D only if the caller of Exim is root. Without
2348 it, the exim user may also use -C and -D and retain privilege.
2349
2350 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2351 command line option is disabled.
2352
2353 6. Macro names set by the -D option must start with an upper case letter, just
2354 like macro names defined in the configuration file.
2355
2356 7. Added "dereference=" facility to LDAP.
2357
2358 8. Two instances of the typo "uknown" in the source files are fixed.
2359
2360 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2361 the Configure-Makefile script screwed up while processing it.
2362
236310. Incorporated PCRE 4.4.
2364
236511. The SMTP synchronization check was not operating right at the start of an
2366 SMTP session. For example, it could not catch a HELO sent before the client
2367 waited for the greeting. There is now a check for outstanding input at the
2368 point when the greeting is written. Because of the duplex, asynchronous
2369 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2370 way, but not yet received, when the check is performed.
2371
237212. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2373 on TCP/IP sockets, because this apparently causes some broken clients to
2374 timeout.
2375
237613. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2377 unchanged) from the Cygwin maintainer.
2378
237914. The code for -bV that shows what is in the binary showed "mbx" when maildir
2380 was supported instead of testing for mbx. Effectively a typo.
2381
238215. The spa authenticator server code was not checking that the input it
2383 received was valid base64.
2384
238516. The debug output line for the "set" modifier in ACLs was not showing the
2386 name of the variable that was being set.
2387
238817. Code tidy: the variable type "vtype_string" was never used. Removed it.
2389
239018. Previously, a reference to $sender_host_name did not cause a DNS reverse
2391 lookup on its own. Something else was needed to trigger the lookup. For
2392 example, a match in host_lookup or the need for a host name in a host list.
2393 Now, if $sender_host_name is referenced and the host name has not yet been
2394 looked up, a lookup is performed. If the lookup fails, the variable remains
2395 empty, and $host_lookup_failed is set to "1".
2396
239719. Added "eqi" as a case-independent comparison operator.
2398
239920. The saslauthd authentication condition could segfault if neither service
2400 nor realm was specified.
2401
240221. If an overflowing value such as "2048M" was set for message_size_limit, the
2403 error message that was logged was misleading, and incoming SMTP
2404 connections were dropped. The message is now more accurate, and temporary
2405 errors are given to SMTP connections.
2406
240722. In some error situations (such as 21 above) Exim rejects all SMTP commands
2408 (except RSET) with a 421 error, until QUIT is received. However, it was
2409 failing to send a response to QUIT.
2410
241123. The HELO ACL was being run before the code for helo_try_verify_hosts,
2412 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2413 ACL is now run after the helo_try_verify_hosts code.
2414
241524. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2416 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2417 case-independent, so other case variants are also recognized). Apparently
2418 some systems use these upper case variants.
2419
242025. If more than two messages were waiting for the same host, and a transport
2421 filter was specified for the transport, Exim sent two messages over the
2422 same TCP/IP connection, and then failed with "socket operation on non-
2423 socket" when it tried to send the third.
2424
242526. Added Exim::debug_write and Exim::log_write for embedded Perl use.
2426
242727. The extern definition of crypt16() in expand.c was not being excluded when
2428 the OS had its own crypt16() function.
2429
243028. Added bounce_return_body as a new option, and bounce_return_size_limit
2431 as a preferred synonym for return_size_limit, both as an option and as an
2432 expansion variable.
2433
243429. Added LIBS=-liconv to OS/Makefile-OSF1.
2435
243630. Changed the default configuration ACL to relax the local part checking rule
2437 for addresses that are not in any local domains. For these addresses,
2438 slashes and pipe symbols are allowed within local parts, but the sequence
2439 /../ is explicitly forbidden.
2440
244131. SPA server authentication was not clearing the challenge buffer before
2442 using it.
2443
244432. log_message in a "warn" ACL statement was writing to the reject log as
2445 well as to the main log, which contradicts the documentation and doesn't
2446 seem right (because no rejection is happening). So I have stopped it.
2447
244833. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2449 However, I am unable to do any testing of this.
2450
245134. Fixed an infelicity in the appendfile transport. When checking directories
2452 for a mailbox, to see if any needed to be created, it was accidentally
2453 using path names with one or more superfluous leading slashes; tracing
2454 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
2455
245635. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2457 contents are added to the log line that is written for every discarded
2458 recipient. (Previously a log_message setting was ignored.)
2459
246036. The ${quote: operator now quotes the string if it is empty.
2461
246237. The install script runs exim in order to find its version number. If for
2463 some reason other than non-existence or emptiness, which it checks, it
2464 could not run './exim', it was installing it with an empty version number,
2465 i.e. as "exim-". This error state is now caught, and the installation is
2466 aborted.
2467
246838. An argument was missing from the function that creates an error message
2469 when Exim fails to connect to the socket for saslauthd authentication.
2470 This could cause Exim to crash, or give a corrupted message.
2471
247239. Added isip, isip4, and isip6 to ${if conditions.
2473
247440. The ACL variables $acl_xx are now saved with the message, and can be
2475 accessed later in routers, transports, and filters.
2476
247741. The new lookup type nwildlsearch is like wildlsearch, except that the key
2478 strings in the file are not string-expanded.
2479
248042. If a MAIL command specified a SIZE value that was too large to fit into an
2481 int variable, the check against message_size_limit failed. Such values are
2482 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
2483 day this will have to be increased, but I don't think I want to be around
2484 when emails are that large.
2485
2486
2487
2488Exim version 4.22
2489-----------------
2490
2491 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
2492 iconv() is not standard in FreeBSD.
2493
2494 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
2495 IPv6 enabled. The observed symptom was a segmentation fault on return from
2496 the function os_common_find_running_interfaces() in src/os.c.
2497
2498 3. In the check_special_case() function in daemon.c I had used "errno" as an
2499 argument name, which causes warnings on some systems. This was basically a
2500 typo, since it was named "eno" in the comments!
2501
2502 4. The code that waits for the clock to tick (at a resolution of some fraction
2503 of a second) so as to ensure message-id uniqueness was always waiting for
2504 at least one whole tick, when it could have waited for less. [This is
2505 almost certainly not relevant at current processor speeds, where it is
2506 unlikely to ever wait at all. But we try to future-proof.]
2507
2508 5. The function that sleeps for a time interval that includes fractions of a
2509 second contained a race. It did not block SIGALRM between setting the
2510 timer, and suspending (a couple of lines later). If the interval was short
2511 and the sigsuspend() was delayed until after it had expired, the suspension
2512 never ended. On busy systems this could lead to processes getting stuck for
2513 ever.
2514
2515 6. Some uncommon configurations may cause a lookup to happen in a queue runner
2516 process, before it forks any delivery processes. The open lookup caching
2517 mechanism meant that the open file or database connection was passed into
2518 the delivery process. The problem was that delivery processes always tidy
2519 up cached lookup data. This could cause a problem for the next delivery
2520 process started by the queue runner, because the external queue runner
2521 process does not know about the closure. So the next delivery process
2522 still has data in the lookup cache. In the case of a file lookup, there was
2523 no problem because closing a file descriptor in a subprocess doesn't affect
2524 the parent. However, if the lookup was caching a connection to a database,
2525 the connection was closed, and the second delivery process was likely to
2526 see errors such as "PGSQL: query failed: server closed the connection
2527 unexpectedly". The problem has been fixed by closing all cached lookups
2528 in a queue runner before running a delivery process.
2529
2530 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
2531 seem to have the "const" qualifier which it has on other OS. I've
2532 parameterised it.
2533
2534 8. Change 4.21/2 was too strict. It is only if there are two authenticators
2535 *of the same type* (client or server) with the same public name that an
2536 error should be diagnosed.
2537
2538 9. When Exim looked up a host name for an IP address, but failed to find the
2539 original IP address when looking up the host name (a safety check), it
2540 output the message "<ip address> does not match any IP for NULL", which was
2541 confusing, to say the least. The bug was that the host name should have
2542 appeared instead of "NULL".
2543
254410. Since release 3.03, if Exim is called by a uid other than root or the Exim
2545 user that is built into the binary, and the -C or -D options is used, root
2546 privilege is dropped before the configuration file is read. In addition,
2547 logging is switched to stderr instead of the normal log files. If the
2548 configuration then re-defines the Exim user, the unprivileged environment
2549 is probably not what is expected, so Exim logs a panic warning message (but
2550 proceeds).
2551
2552 However, if deliver_drop_privilege is set, the unprivileged state may well
2553 be exactly what is intended, so the warning has been cut out in that case,
2554 and Exim is allowed to try to write to its normal log files.
2555
2556
2557Exim version 4.21
2558-----------------
2559
2560 1. smtp_return_error_details was not giving details for temporary sender
2561 or receiver verification errors.
2562
2563 2. Diagnose a configuration error if two authenticators have the same public
2564 name.
2565
2566 3. Exim used not to create the message log file for a message until the first
2567 delivery attempt. This could be confusing when incoming messages were held
2568 for policy or load reasons. The message log file is now created at the time
2569 the message is received, and an initial "Received" line is written to it.
2570
2571 4. The automatically generated man page for command line options had a minor
2572 bug that caused no ill effects; however, a more serious problem was that
2573 the procedure for building the man page automatically didn't always
2574 operate. Consequently, release 4.20 contains an out-of-date version. This
2575 shouldn't happen again.
2576
2577 5. When building Exim with embedded Perl support, the script that builds the
2578 Makefile was calling 'perl' to find its compile-time parameters, ignoring
2579 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
2580
2581 6. The freeze_tell option was not being used for messages that were frozen on
2582 arrival, either by an ACL or by local_scan().
2583
2584 7. Added the smtp_incomplete_transaction log selector.
2585
2586 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
2587 was accepting AUTH without a new EHLO.
2588
2589 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
2590 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
2591 RFC.
2592
259310. Logging of TCP/IP connections (when configured) now happens in the main
2594 daemon process instead of the child process, so that the TCP/IP connection
2595 count is more accurate (but it can never be perfect).
2596
259711. The use of "drop" in a nested ACL was not being handled correctly in the
2598 outer ACL. Now, if condition failure induced by the nested "drop" causes
2599 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
2600 or "require"), the connection is dropped.
2601
260212. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
2603 that yield "discard" can now be used with an "accept" or a "discard" verb,
2604 but an error is generated for any others (because I can't see a useful way
2605 to define what should happen).
2606
260713. When an ACL is read dynamically from a file (or anywhere else), the lines
2608 are now processed in the same way as lines in the Exim configuration file.
2609 In particular, continuation lines are supported.
2610
261114. Added the "dnslists = a.b.c!=n.n.n.n" feature.
2612
261315. Added -ti meaning -t -i.
2614
261516. Check for letters, digits, hyphens, and dots in the names of dnslist
2616 domains, and warn by logging if others are found.
2617
261817. At least on BSD, alignment is not guarenteed for the array of ifreq's
2619 returned from GIFCONF when Exim is trying to find the list of interfaces on
2620 a host. The code in os.c has been modified to copy each ifreq to an aligned
2621 structure in all cases.
2622
2623 Also, in some cases, the returned ifreq's were being copied to a 'struct
2624 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
2625 means the last couple of bytes of an IPv6 address could be chopped if the
2626 ifreq contained only a normal sockaddr (14 bytes storage).
2627
262818. Named domain lists were not supported in the hosts_treat_as_local option.
2629 An entry such as +xxxx was not recognized, and was treated as a literal
2630 domain name.
2631
263219. Ensure that header lines added by a DATA ACL are included in the reject log
2633 if the ACL subsequently rejects the message.
2634
263520. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
2636 MD5 (which is deprecated).
2637
263821. When testing a filter file using -bf, Exim was writing a message when it
2639 took the sender from a "From " line in the message, but it was not doing so
2640 when it took $return_path from a Return-Path: header line. It now does.
2641
264222. If the contents of a "message" modifier for a "warn" ACL verb do not begin
2643 with a valid header line field name (a series of printing characters
2644 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
2645
264623. Changed "disc" in the source to "disk" to conform to the documentation and
2647 the book and for uniformity.
2648
264924. Ignore Sendmail's -Ooption=value command line item.
2650
265125. When execve() failed while trying to run a command in a pipe transport,
2652 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
2653 could be confused with a return value of 69 from the command itself. This
2654 has been changed to 127, the value the shell returns if it is asked to run
2655 a non-existent command. The wording for the related log line suggests a
2656 non-existent command as the problem.
2657
265826. If received_header_text expands to an empty string, do not add a Received:
2659 header line to the message. (Well, it adds a token one on the spool, but
2660 marks it "old" so that it doesn't get used or transmitted.)
2661
266227. Installed eximstats 1.28 (addition of -nt option).
2663
266428. There was no check for failure on the call to getsockname() in the daemon
2665 code. This can fail if there is a shortage of resources on the system, with
2666 ENOMEM, for example. A temporary error is now given on failure.
2667
266829. Contrary to the C standard, it seems that in some environments, the
2669 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
2670 program. Exim now does this explicitly; it affects the formatting of
2671 timestamps using strftime().
2672
267330. If exiqsumm was given junk data, it threw up some uninitialized variable
2674 complaints. I've now initialized all the variables, to avoid this.
2675
267632. Header lines added by a system filter were not being "seen" during
2677 transport-time rewrites.
2678
267933. The info_callback() function passed to OpenSSL is set up with type void
2680 (*)(SSL *, int, int), as described somewhere. However, when calling the
2681 function (actually a macro) that sets it up, the type void(*)() is
2682 expected. I've put in a cast to prevent warnings from picky compilers.
2683
268434. If a DNS black list lookup found a CNAME record, but there were no A
2685 records associated with the domain it pointed at, Exim crashed.
2686
268735. If a DNS black list lookup returned more than one A record, Exim ignored
2688 all but the first. It now scans all returned addresses if a particular IP
2689 value is being sought. In this situation, the contents of the
2690 $dnslist_value variable are a list of all the addresses, separated by a
2691 comma and a space.
2692
269336. Tightened up the rules for host name lookups using reverse DNS. Exim used
2694 to accept a host name and all its aliases if the forward lookup for any of
2695 them yielded the IP address of the incoming connection. Now it accepts only
2696 those names whose forward lookup yields the correct IP address. Any other
2697 names are discarded. This closes a loophole whereby a rogue DNS
2698 administrator could create reverse DNS records to break through a
2699 wildcarded host restriction in an ACL.
2700
270137. If a user filter or a system filter that ran in a subprocess used any of
2702 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
2703 the wrong values were passed to the pipe command ($thisaddress had the
2704 value of $0, $0 had the value of $1, etc). This bug was introduced by
2705 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
2706
270738. Improved the line breaking for long SMTP error messages from ACLs.
2708 Previously, if there was no break point between 40 and 75 characters, Exim
2709 left the rest of the message alone. Two changes have been made: (a) I've
2710 reduced the minimum length to 35 characters; (b) if it can't find a break
2711 point between 35 and 75 characters, it looks ahead and uses the first one
2712 that it finds. This may give the occasional overlong line, but at least the
2713 remaining text gets split now.
2714
271539. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
2716 file descriptors might be low, and that setting 1000 would always raise it.
2717 It turns out that in some environments, the limit is already over 1000 and
2718 that lowering it causes trouble. So now Exim takes care not to decrease it.
2719
272040. When delivering a message, the value of $return_path is set to $sender_
2721 address at the start of routing (routers may change the value). By an
2722 oversight, this default was not being set up when an address was tested by
2723 -bt or -bv, which affected the outcome if any router or filter referred to
2724 $return_path.
2725
272641. The idea of the "warn" ACL verb is that it adds a header or writes to the
2727 log only when "message" or "log_message" are set. However, if one of the
2728 conditions was an address verification, or a call to a nested ACL, the
2729 messages generated by the underlying test were being passed through. This
2730 no longer happens. The underlying message is available in $acl_verify_
2731 message for both "message" and "log_message" expansions, so it can be
2732 passed through if needed.
2733
273442. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
2735 new expansion $bh_ to give the encoded byte string without charset
2736 translation. Translation happens only if iconv() is available; HAVE_ICONV
2737 indicates this at build time. HEADERS_CHARSET gives the charset to
2738 translate to; headers_charset can change it in the configuration, and
2739 "headers charset" can change it in an individual filter file.
2740
274143. Now that we have a default RFC 2047 charset (see above), the code in Exim
2742 that creates RFC 2047 encoded "words" labels them as that charset instead
2743 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
2744 expansion operator; (ii) when Exim creates a From: line for a local
2745 message; (iii) when a header line is rewritten to include a "phrase" part.
2746
274744. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
2748 buggy, causing it to skip the first lines of messages whose message ID
2749 ended in 'D'. This would not have bitten before Exim release 4.14, because
2750 message IDs were unlikely to end in 'D' before then. The effect was to have
2751 incorrect size information for certain domains.
2752
275345. #include "config.h" was missing at the start of the crypt16.c module. This
2754 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
2755 noticed.
2756
275746. If there was a timeout during a "random" callout check, Exim treated it as
2758 a failure of the random address, and carried on sending RSET and the real
2759 address. If the delay was just some slowness somewhere, the response to the
2760 original RCPT would be taken as a response to RSET and so on, causing
2761 mayhem of various kinds.
2762
276347. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
2764 when I implemented it. It didn't allow for the fact that some option values
2765 may legitimatetly be negative (e.g. size_addition), and it didn't even do
2766 the right test for positive values.
2767
276848. Domain names in DNS records are case-independent. Exim always looks them up
2769 in lower case. Some resolvers return domain names in exactly the case they
2770 appear in the zone file, that is, they may contain uppercase letters. Not
2771 all resolvers do this - some return always lower case. Exim was treating a
2772 change of case by a resolver as a change of domain, similar to a widening
2773 of a domain abbreviation. This triggered its re-routing code and so it was
2774 trying to route what was effectively the same domain again. This normally
2775 caused routing to fail (because the router wouldn't handle the domain
2776 twice). Now Exim checks for this case specially, and just changes the
2777 casing of the domain that it ultimately uses when it transmits the message
2778 envelope.
2779
278049. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
2781 module.
2782
278350. If a filter generated a file delivery with a non-absolute name (possible if
2784 no home directory exists for the router), the forbid_file option was not
2785 forbidding it.
2786
278751. Added '&' feature to dnslists, to provide bit mask matching in addition to
2788 the existing equality matching.
2789
279052. Exim was using ints instead of ino_t variables in some places where it was
2791 dealing with inode numbers.
2792
279353. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
2794 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
2795 called TMPDIR, and if it finds it is different, it changes its value.
2796
279754. The smtp_printf() function is now made available to local_scan() so
2798 additional output lines can be written before returning. There is also an
2799 smtp_fflush() function to enable the detection of a dropped connection.
2800 The variables smtp_input and smtp_batched_input are exported to
2801 local_scan().
2802
280355. Changed the default runtime configuration: the message "Unknown user"
2804 has been removed from the ACL, and instead placed on the localuser router,
2805 using the cannot_route_message feature. This means that any verification
2806 failures that generate their own messages won't get overridden. Similarly,
2807 the "Unrouteable address" message that was in the ACL for unverifiable
2808 relay addresses has also been removed.
2809
281056. Added hosts_avoid_esmtp to the smtp transport.
2811
281257. The exicyclog script was not checking for the esoteric option
2813 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
2814 will work only if exicyclog is run under the appropriate euid.
2815
281658. Following a discussion on the list, the rules by which Exim recognises line
2817 endings on incoming messages have been changed. The -dropcr and drop_cr
2818 options are now no-ops, retained only for backwards compatibility. The
2819 following line terminators are recognized: LF CRLF CR. However, special
2820 processing applies to CR:
2821
2822 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
2823 nor a local message in the state where . is a terminator.
2824
2825 (ii) If a bare CR is encountered in a header line, an extra space is added
2826 after the line terminator so as not to end the header. The reasoning
2827 behind this is that bare CRs in header lines are most likely either
2828 to be mistakes, or people trying to play silly games.
2829
283059. The size of a message, as listed by "-bp" or in the Exim monitor window,
2831 was being incorrectly given as 18 bytes larger than it should have been.
2832 This is a VOB (very old bug).
2833
283460. This may never have affected anything current, but just in case it has:
2835 When the local host is found other than at the start of a list of hosts,
2836 the local host, those with the same MX, and any that follow, are discarded.
2837 When the list in question was part of a longer list of hosts, the following
2838 hosts (not currently being processed) were also being discarded. This no
2839 longer happens. I'm not sure if this situation could ever has previously
2840 arisen.
2841
284261. Added the "/MX" feature to lists of hosts in the manualroute and query
2843 program routers.
2844
284562. Whenever Exim generates a new message, it now adds an Auto-Submitted:
2846 header. This is something that is recommended in a new Internet Draft, and
2847 is something that is documented as being done by Sendmail. There are two
2848 possible values. For messages generated by the autoreply transport, Exim
2849 adds:
2850
2851 Auto-Submitted: auto-replied
2852
2853 whereas for all other generated messages (e.g. bounces) it adds
2854
2855 Auto-Submitted: auto-generated
2856
285763. The "personal" condition in filters now includes a test for the
2858 Auto-Submitted: header. If it contains the string "auto-" the message it
2859 not considered personal.
2860
286164. Added rcpt_include_affixes as a generic transport option.
2862
286365. Added queue_only_override (default true).
2864
286566. Added the syslog_duplication option.
2866
286767. If what should have been the first header line of a message consisted of
2868 a space followed by a colon, Exim was mis-interpreting it as a header line.
2869 It isn't of course - it is syntactically invalid and should therefore be
2870 treated as the start of the message body. The misbehaviour could have
2871 caused a number of strange effects, including loss of data in subsequent
2872 header lines, and spool format errors.
2873
287468. Formerly, the AUTH parameter on a MAIL command was trusted only if the
2875 client host had authenticated. This control can now be exercised by an ACL
2876 for more flexibility.
2877
287869. By default, callouts do not happen when testing with -bh. There is now a
2879 variant, -bhc, which does actually run the callout code, including
2880 consulting and updating the callout cache.
2881
288270. Added support for saslauthd authentication, courtesy of Alexander
2883 Sabourenkov.
2884
288571. If statvfs() failed on the spool or log directories while checking their
2886 size for availability, Exim confusingly gave the error "space shortage".
2887 Furthermore, in debugging mode it crashed with a floating point exception.
2888 These checks are done if check_{spool,log}_{space,inodes} are set, and when
2889 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
2890 serious problem, Exim now writes to the main and panic logs when this
2891 happens, with details of the failure. It then refuses to accept the
2892 incoming message, giving the message "spool directory problem" or "log
2893 directory problem" with a 421 code for SMTP messages.
2894
289572. When Exim is about to re-exec itself, it ensures that the file descriptors
2896 0, 1, and 2 exist, because some OS complain for execs without them (see
2897 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
2898 descriptors. However, the code omitted to check that the open succeeded,
2899 causing mysterious errors if for some reason the permissions on /dev/null
2900 got screwed. Now Exim writes a message to the main and panic logs, and
2901 bombs out if it can't open /dev/null.
2902
290373. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
2904 interact so that it is all more flexible. It is supposed to remain
2905 backwards compatible. Also added extra_local_interfaces.
2906
290774. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
2908 to bomb out with an assertion failure - to the client this appears as a
2909 connection drop. This problem occurs in the part of the code that was taken
2910 from the Samba project. Fortunately, the assertion is in a very simple
2911 function, so I have fixed this by reproducing the function inline in the
2912 one place where it is called, and arranging for authentication to fail
2913 instead of killing the process with assert().
2914
291575. The SPA client code was not working when the server requested OEM rather
2916 than Unicode encoding.
2917
291876. Added code to make require_files with a specific uid setting more usable in
2919 the case where statting the file as root fails - usually a non-root-mounted
2920 NFS file system. When this happens and the failure is EACCES, Exim now
2921 forks a subprocess and does the per-uid checking as the relevant uid.
2922
292377. Added process_log_path.
2924
292578. If log_file_path was not explicitly set, a setting of check_log_space or
2926 check_log_inodes was ignored.
2927
292879. If a space check for the spool or log partitions fails, the incident is now
2929 logged. Of course, in the latter case the data may get lost...
2930
293180. Added the %p formatting code to string_format() so that it can be used to
2932 print addresses in debug_print(). Adjusted all the address printing in the
2933 debugging in store.c to use %p rather than %d.
2934
293581. There was a concern that a line of code in smtp_in.c could overflow a
2936 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
2937 initially expressed, the concern was not well-founded, because trailing
2938 spaces are removed early. However, if the trailing spaces were followed by
2939 a NULL, they did not get removed, so the overflow was possible. Two fixes
2940 were applied:
2941
2942 (a) I re-wrote the offending code in a cleaner fashion.
2943 (b) If an incoming SMTP command contains a NULL character, it is rejected
2944 as invalid.
2945
294682. When Exim changes uid/gid to the Exim user at daemon start time, it now
2947 runs initgroups(), so that if the Exim user is in any additional groups,
2948 they will be used during message reception.
2949
2950
2951Exim version 4.20
2952-----------------
2953
2954The change log for 4.20 and earlier releases has been archived.
2955
2956****