Commit | Line | Data |
---|---|---|
139059f6 | 1 | $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.3 2004/10/11 13:24:19 ph10 Exp $ |
495ae4b0 PH |
2 | |
3 | Change log file for Exim from version 4.21 | |
4 | ------------------------------------------- | |
5 | ||
6 | ||
7 | Exim version 4.44 | |
8 | ----------------- | |
9 | ||
5fe762f6 PH |
10 | 1. Minor wording change to the doc/README.SIEVE file. |
11 | ||
139059f6 | 12 | 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the |
5fe762f6 | 13 | computation of the current number of files was incorrect. |
495ae4b0 PH |
14 | |
15 | ||
16 | Exim version 4.43 | |
17 | ----------------- | |
18 | ||
19 | 1. Fixed a longstanding but relatively impotent bug: a long time ago, before | |
20 | PIPELINING, the function smtp_write_command() used to return TRUE or FALSE. | |
21 | Now it returns an integer. A number of calls were still expecting a T/F | |
22 | return. Fortuitously, in all cases, the tests worked in OK situations, | |
23 | which is the norm. However, things would have gone wrong on any write | |
24 | failures on the smtp file descriptor. This function is used when sending | |
25 | messages over SMTP and also when doing verify callouts. | |
26 | ||
27 | 2. When Exim is called to do synchronous delivery of a locally submitted | |
28 | message (the -odf or -odi options), it no longer closes stderr before doing | |
29 | the delivery. | |
30 | ||
31 | 3. Implemented the mua_wrapper option. | |
32 | ||
33 | 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router. | |
34 | ||
35 | 5. Implemented the functions header_remove(), header_testname(), | |
36 | header_add_at_position(), and receive_remove_recipient(), and exported them | |
37 | to local_scan(). | |
38 | ||
39 | 6. If an ACL "warn" statement specified the addition of headers, Exim already | |
40 | inserted X-ACL-Warn: at the start if there was no header name. However, it | |
41 | was not making this test for the second and subsequent header lines if | |
42 | there were newlines in the string. This meant that an invalid header could | |
43 | be inserted if Exim was badly configured. | |
44 | ||
45 | 7. Allow an ACL "warn" statement to add header lines at the start or after all | |
46 | the Received: headers, as well as at the end. | |
47 | ||
48 | 8. Added the rcpt_4xx retry error code. | |
49 | ||
50 | 9. Added postmaster_mailfrom=xxx to callout verification option. | |
51 | ||
52 | 10. Added mailfrom=xxxx to the callout verification option, for verify= | |
53 | header_sender only. | |
54 | ||
55 | 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors | |
56 | (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}). | |
57 | ||
58 | 12. Inserted some casts to stop certain compilers warning when using pointer | |
59 | differences as field lengths or precisions in printf-type calls (mostly | |
60 | affecting debugging statements). | |
61 | ||
62 | 13. Added optional readline() support for -be (dynamically loaded). | |
63 | ||
64 | 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the | |
65 | same clock tick as a message's arrival, so that its received time was the | |
66 | same as the "first fail" time on the retry record, and that message | |
67 | remained on the queue past the ultimate address timeout, every queue runner | |
68 | would try a delivery (because it was past the ultimate address timeout) but | |
69 | after another failure, the ultimate address timeout, which should have then | |
70 | bounced the address, did not kick in. This was a "< instead of <=" error; | |
71 | in most cases the first failure would have been in the next clock tick | |
72 | after the received time, and all would be well. | |
73 | ||
74 | 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not | |
75 | being recognized when the domain list was tested by the match_domain | |
76 | condition in an expansion string. | |
77 | ||
78 | 16. Added the ${str2b64: operator. | |
79 | ||
80 | 17. Exim was always calling setrlimit() to set a large limit for the number of | |
81 | processes, without checking whether the existing limit was already | |
82 | adequate. (It did check for the limit on file descriptors.) Furthermore, | |
83 | errors from getrlimit() and setrlimit() were being ignored. Now they are | |
84 | logged to the main and panic logs, but Exim does carry on, to try to do its | |
85 | job under whatever limits there are. | |
86 | ||
87 | 18. Imported PCRE 5.0. | |
88 | ||
89 | 19. Trivial typo in log message " temporarily refused connection" (the leading | |
90 | space). | |
91 | ||
92 | 20. If the log selector return_path_on_delivery was set and an address was | |
93 | redirected to /dev/null, the delivery process crashed because it assumed | |
94 | that a return path would always be set for a "successful" delivery. In this | |
95 | case, the whole delivery is bypassed as an optimization, and therefore no | |
96 | return path is set. | |
97 | ||
98 | 21. Internal re-arrangement: the function for sending a challenge and reading | |
99 | a response while authentication was assuming a zero-terminated challenge | |
100 | string. It's now changed to take a pointer and a length, to allow for | |
101 | binary data in such strings. | |
102 | ||
103 | 22. Added the cyrus_sasl authenticator (code supplied by MBM). | |
104 | ||
105 | 23. Exim was not respecting finduser_retries when seeking the login of the | |
106 | uid under which it was called; it was always trying 10 times. (The default | |
107 | setting of finduser_retries is zero.) Also, it was sleeping after the final | |
108 | failure, which is pointless. | |
109 | ||
110 | 24. Implemented tls_on_connect_ports. | |
111 | ||
112 | 25. Implemented acl_smtp_predata. | |
113 | ||
114 | 26. If the domain in control=submission is set empty, Exim assumes that the | |
115 | authenticated id is a complete email address when it generates From: or | |
116 | Sender: header lines. | |
117 | ||
118 | 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added | |
119 | definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename, | |
120 | chown and chgrp in /bin and hostname in /usr/bin. | |
121 | ||
122 | 28. Exim was keeping the "process log" file open after each use, just as it | |
123 | does for the main log. This opens the possibility of it remaining open for | |
124 | long periods when the USR1 signal hits a daemon. Occasional processlog | |
125 | errors were reported, that could have been caused by this. Anyway, it seems | |
126 | much more sensible not to leave this file open at all, so that is what now | |
127 | happens. | |
128 | ||
129 | 29. The long-running daemon process does not normally write to the log once it | |
130 | has entered its main loop, and it closes the log before doing so. This is | |
131 | so that log files can straightforwardly be renamed and moved. However, | |
132 | there are a couple of unusual error situations where the daemon does write | |
133 | log entries, and I had neglected to close the log afterwards. | |
134 | ||
135 | 30. The text of an SMTP error response that was received during a remote | |
136 | delivery was being truncated at 512 bytes. This is too short for some of | |
137 | the long messages that one sometimes sees. I've increased the limit to | |
138 | 1024. | |
139 | ||
140 | 31. It is now possible to make retry rules that apply only when a message has a | |
141 | specific sender, in particular, an empty sender. | |
142 | ||
143 | 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes | |
144 | it possible to be selective about when SMTP synchronization is enforced. | |
145 | ||
146 | 33. Added "control = caseful_local_part" and "control = "caselower_local_part". | |
147 | ||
148 | 32. Implemented hosts_connection_nolog. | |
149 | ||
150 | 33. Added an ACL for QUIT. | |
151 | ||
152 | 34. Setting "delay_warning=" to disable warnings was not working; it gave a | |
153 | syntax error. | |
154 | ||
155 | 35. Added mailbox_size and mailbox_filecount to appendfile. | |
156 | ||
157 | 36. Added control = no_multiline_responses to ACLs. | |
158 | ||
159 | 37. There was a bug in the logic of the code that waits for the clock to tick | |
160 | in the case where the clock went backwards by a substantial amount such | |
161 | that the microsecond fraction of "now" was more than the microsecond | |
162 | fraction of "then" (but the whole seconds number was less). | |
163 | ||
164 | 38. Added support for the libradius Radius client library this is found on | |
165 | FreeBSD (previously only the radiusclient library was supported). | |
166 | ||
167 | ||
168 | Exim version 4.42 | |
169 | ----------------- | |
170 | ||
171 | 1. When certain lookups returned multiple values in the form name=value, the | |
172 | quoting of the values was not always being done properly. Specifically: | |
173 | (a) If the value started with a double quote, but contained no whitespace, | |
174 | it was not quoted. | |
175 | (b) If the value contained whitespace other than a space character (i.e. | |
176 | tabs or newlines or carriage returns) it was not quoted. | |
177 | This fix has been applied to the mysql and pgsql lookups by writing a | |
178 | separate quoting function and calling it from the lookup code. The fix | |
179 | should probably also be applied to nisplus, ibase and oracle lookups, but | |
180 | since I cannot test any of those, I have not disturbed their existing code. | |
181 | ||
182 | 2. A hit in the callout cache for a specific address caused a log line with no | |
183 | reason for rejecting RCPT. Now it says "Previous (cached) callout | |
184 | verification failure". | |
185 | ||
186 | 3. There was an off-by-one bug in the queryprogram router. An over-long | |
187 | return line was truncated at 256 instead of 255 characters, thereby | |
188 | overflowing its buffer with the terminating zero. As well as fixing this, I | |
189 | have increased the buffer size to 1024 (and made a note to document this). | |
190 | ||
191 | 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives | |
192 | when Exim is waiting for an SMTP response from a remote server, Exim | |
193 | restarts its select() call on the socket, thereby resetting its timeout. | |
194 | This is not a problem when such interrupts are rare. Somebody set up a cron | |
195 | job to run exiwhat every 2 minutes, which is less than the normal select() | |
196 | timeout (5 or 10 minutes). This meant that the select() timeout never | |
197 | kicked in because it was always reset. I have fixed this by comparing the | |
198 | time when an interrupt arrives with the time at the start of the first call | |
199 | to select(). If more time than the timeout has elapsed, the interrupt is | |
200 | treated as a timeout. | |
201 | ||
202 | 5. Some internal re-factoring in preparation for the addition of Sieve | |
203 | extensions (by MH). In particular, the "personal" test is moved to a | |
204 | separate function, and given an option for scanning Cc: and Bcc: (which is | |
205 | not set for Exim filters). | |
206 | ||
207 | 6. When Exim created an email address using the login of the caller as the | |
208 | local part (e.g. when creating a From: or Sender: header line), it was not | |
209 | quoting the local part when it contained special characters such as @. | |
210 | ||
211 | 7. Installed new OpenBSD configuration files. | |
212 | ||
213 | 8. Reworded some messages for syntax errors in "and" and "or" conditions to | |
214 | try to make them clearer. | |
215 | ||
216 | 9. Callout options, other than the timeout value, were being ignored when | |
217 | verifying sender addresses in header lines. For example, when using | |
218 | ||
219 | verify = header_sender/callout=no_cache | |
220 | ||
221 | the cache was (incorrectly) being used. | |
222 | ||
223 | 10. Added a missing instance of ${EXE} to the exim_install script; this affects | |
224 | only the Cygwin environment. | |
225 | ||
226 | 11. When return_path_on_delivery was set as a log selector, if different remote | |
227 | addresses in the same message used different return paths and parallel | |
228 | remote delivery occurred, the wrong values would sometimes be logged. | |
229 | (Whenever a remote delivery process finished, the return path value from | |
230 | the most recently started remote delivery process was logged.) | |
231 | ||
232 | 12. RFC 3848 specifies standard names for the "with" phrase in Received: header | |
233 | lines when AUTH and/or TLS are in use. This is the "received protocol" | |
234 | field. Exim used to use "asmtp" for authenticated SMTP, without any | |
235 | indication (in the protocol name) for TLS use. Now it follows the RFC and | |
236 | uses "esmtpa" if the connection is authenticated, "esmtps" if it is | |
237 | encrypted, and "esmtpsa" if it is both encrypted and authenticated. These | |
238 | names appear in log lines as well as in Received: header lines. | |
239 | ||
240 | 13. Installed MH's patches for Sieve to add the "copy" and "vacation" | |
241 | extensions, and comparison tests, and to fix some bugs. | |
242 | ||
243 | 14. Changes to the "personal" filter test: | |
244 | ||
245 | (1) The test was buggy in that it was just doing the equivalent of | |
246 | "contains" tests on header lines. For example, if a user's address was | |
247 | anne@some.where, the "personal" test would incorrectly be true for | |
248 | ||
249 | To: susanne@some.where | |
250 | ||
251 | This test is now done by extracting each address from the header in turn, | |
252 | and checking the entire address. Other tests that are part of "personal" | |
253 | are now done using regular expressions (for example, to check local parts | |
254 | of addresses in From: header lines). | |
255 | ||
256 | (2) The list of non-personal local parts in From: addresses has been | |
257 | extended to include "listserv", "majordomo", "*-request", and "owner-*", | |
258 | taken from the Sieve specification recommendations. | |
259 | ||
260 | (3) If the message contains any header line starting with "List-" it is | |
261 | treated as non-personal. | |
262 | ||
263 | (4) The test for "circular" in the Subject: header line has been removed | |
264 | because it now seems ill-conceived. | |
265 | ||
266 | 15. Minor typos in src/EDITME comments corrected. | |
267 | ||
268 | 16. Installed latest exipick from John Jetmore. | |
269 | ||
270 | 17. If headers_add on a router specified a text string that was too long for | |
271 | string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use | |
272 | of string_sprintf() is now avoided. | |
273 | ||
274 | 18. $message_body_size was not set (it was always zero) when running the DATA | |
275 | ACL and the local_scan() function. | |
276 | ||
277 | 19. For the "mail" command in an Exim filter, no default was being set for | |
278 | the once_repeat time, causing a random time value to be used if "once" was | |
279 | specified. (If the value happened to be <= 0, no repeat happened.) The | |
280 | default is now 0s, meaning "never repeat". The "vacation" command was OK | |
281 | (its default is 7d). It's somewhat surprising nobody ever noticed this bug | |
282 | (I found it when inspecting the code). | |
283 | ||
284 | 20. There is now an overall timeout for performing a callout verification. It | |
285 | defaults to 4 times the callout timeout, which applies to individual SMTP | |
286 | commands during the callout. The overall timeout applies when there is more | |
287 | than one host that can be tried. The timeout is checked before trying the | |
288 | next host. This prevents very long delays if there are a large number of | |
289 | hosts and all are timing out (e.g. when the network connections are timing | |
290 | out). The value of the overall timeout can be changed by specifying an | |
291 | additional sub-option for "callout", called "maxwait". For example: | |
292 | ||
293 | verify = sender/callout=5s,maxwait=20s | |
294 | ||
295 | 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks | |
296 | to the end before writing, but this should make it even safer). | |
297 | ||
298 | 22. Exim was forgetting that it had advertised PIPELINING for the second and | |
299 | subsequent messages on an SMTP connection. It was also not resetting its | |
300 | memory on STARTTLS and an internal HELO. | |
301 | ||
302 | 23. When Exim logs an SMTP synchronization error within a session, it now | |
303 | records whether PIPELINING has been advertised or not. | |
304 | ||
305 | 24. Added 3 instances of "(long int)" casts to time_t variables that were being | |
306 | formatted using %ld, because on OpenBSD (and perhaps others), time_t is int | |
307 | rather than long int. | |
308 | ||
309 | 25. Installed the latest Cygwin configuration files from the Cygwin maintainer. | |
310 | ||
311 | 26. Added the never_mail option to autoreply. | |
312 | ||
313 | ||
314 | Exim version 4.41 | |
315 | ----------------- | |
316 | ||
317 | 1. A reorganization of the code in order to implement 4.40/8 caused a daemon | |
318 | crash if the getsockname() call failed; this can happen if a connection is | |
319 | closed very soon after it is established. The problem was simply in the | |
320 | order in which certain operations were done, causing Exim to try to write | |
321 | to the SMTP stream before it had set up the file descriptor. The bug has | |
322 | been fixed by making things happen in the correct order. | |
323 | ||
324 | ||
325 | Exim version 4.40 | |
326 | ----------------- | |
327 | ||
328 | 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed | |
329 | before the connection was closed, thus losing the rejection response. | |
330 | ||
331 | 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for | |
332 | some early Solaris releases, but causes trouble in current releases where | |
333 | socklen_t is defined. | |
334 | ||
335 | 3. When std{in,out,err} are closed, re-open them to /dev/null so that they | |
336 | always exist. | |
337 | ||
338 | 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not | |
339 | configured. | |
340 | ||
341 | 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so | |
342 | that releasing the top of it at the end releases what was used for sub- | |
343 | expansions (unless the block got too big). However, discard this block if | |
344 | the first thing is a variable or header, so that we can use its block when | |
345 | it is dynamic (useful for very large $message_headers, for example). | |
346 | ||
347 | 6. Lookups now cache *every* query, not just the most recent. A new, separate | |
348 | store pool is used for this. It can be recovered when all lookup caches are | |
349 | flushed. Lookups now release memory at the end of their result strings. | |
350 | This has involved some general refactoring of the lookup sources. | |
351 | ||
352 | 7. Some code has been added to the store_xxx() functions to reduce the amount | |
353 | of flapping under certain conditions. | |
354 | ||
355 | 8. log_incoming_interface used to affect only the <= reception log lines. Now | |
356 | it causes the local interface and port to be added to several more SMTP log | |
357 | lines, for example "SMTP connection from", and rejection lines. | |
358 | ||
359 | 9. The Sieve author supplied some patches for the doc/README.SIEVE file. | |
360 | ||
361 | 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin. | |
362 | ||
363 | 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value | |
364 | could be overwritten at the end of the current message (or the start of a | |
365 | new message if it was set in a HELO ACL). The value is now preserved for | |
366 | the duration of the SMTP connection. | |
367 | ||
368 | 12. If a transport had a headers_rewrite setting, and a matching header line | |
369 | contained an unqualified address, that address was qualified, even if it | |
370 | did not match any rewriting rules. The underlying bug was that the values | |
371 | of the flags that permit the existence of unqualified sender and recipient | |
372 | addresses in header lines (set by {sender,recipient}_unqualified_hosts for | |
373 | non-local messages, and by -bnq for local messages) were not being | |
374 | preserved with the message after it was received. | |
375 | ||
376 | 13. When Exim was logging an SMTP synchronization error, it could sometimes log | |
377 | "next input=" as part of the text comprising the host identity instead of | |
378 | the correct text. The code was using the same buffer for two different | |
379 | strings. However, depending on which order the printing function evaluated | |
380 | its arguments, the bug did not always show up. Under Linux, for example, my | |
381 | test suite worked just fine. | |
382 | ||
383 | 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This | |
384 | doesn't work with some older versions of Perl. It has been changed to "my", | |
385 | which in any case is probably the better facility to use. | |
386 | ||
387 | 15. A really picky compiler found some instances of statements for creating | |
388 | error messages that either had too many or two few arguments for the format | |
389 | string. | |
390 | ||
391 | 16. The size of the buffer for calls to the DNS resolver has been increased | |
392 | from 1024 to 2048. A larger buffer is needed when performing PTR lookups | |
393 | for addresses that have a lot of PTR records. This alleviates a problem; it | |
394 | does not fully solve it. | |
395 | ||
396 | 17. A dnsdb lookup for PTR records that receives more data than will fit in the | |
397 | buffer now truncates the list and logs the incident, which is the same | |
398 | action as happens when Exim is looking up a host name and its aliases. | |
399 | Previously in this situation something unpredictable would happen; | |
400 | sometimes it was "internal error: store_reset failed". | |
401 | ||
402 | 18. If a server dropped the connection unexpectedly when an Exim client was | |
403 | using GnuTLS and trying to read a response, the client delivery process | |
404 | crashed while trying to generate an error log message. | |
405 | ||
406 | 19. If a "warn" verb in an ACL added multiple headers to a message in a single | |
407 | string, for example: | |
408 | ||
409 | warn message = H1: something\nH2: something | |
410 | ||
411 | the text was added as a single header line from Exim's point of view | |
412 | though it ended up OK in the delivered message. However, searching for the | |
413 | second and subsequent header lines using $h_h2: did not work. This has been | |
414 | fixed. Similarly, if a system filter added multiple headers in this way, | |
415 | the routers could not see them. | |
416 | ||
417 | 20. Expanded the error message when iplsearch is called with an invalid key to | |
418 | suggest using net-iplsearch in a host list. | |
419 | ||
420 | 21. When running tests using -bh, any delays imposed by "delay" modifiers in | |
421 | ACLs are no longer actually imposed (and a message to that effect is | |
422 | output). | |
423 | ||
424 | 22. If a "gecos" field in a passwd entry contained escaped characters, in | |
425 | particular, if it contained a \" sequence, Exim got it wrong when building | |
426 | a From: or a Sender: header from that name. A second bug also caused | |
427 | incorrect handling when an unquoted " was present following a character | |
428 | that needed quoting. | |
429 | ||
430 | 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item | |
431 | was not being matched caselessly. | |
432 | ||
433 | 24. Arranged for all hyphens in the exim.8 source to be escaped with | |
434 | backslashes. | |
435 | ||
436 | 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job | |
437 | properly. Recipient callout cache records were still being keyed to include | |
438 | the sender, even when use_sender was set false. This led to far more | |
439 | callouts that were necessary. The sender is no longer included in the key | |
440 | when use_sender is false. | |
441 | ||
442 | 26. Added "control = submission" modifier to ACLs. | |
443 | ||
444 | 27. Added the ${base62d: operator to decode base 62 numbers. | |
445 | ||
446 | 28. dnsdb lookups can now access SRV records. | |
447 | ||
448 | 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for | |
449 | the configuration file. | |
450 | ||
451 | 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose | |
452 | (-v) mode. This makes the output for a verbose queue run more intelligible. | |
453 | ||
454 | 31. Added a use_postmaster feature to recipient callouts. | |
455 | ||
456 | 32. Added the $body_zerocount variable, containing the number of binary zero | |
457 | bytes in the message body. | |
458 | ||
459 | 33. The time of last modification of the "new" subdirectory is now used as the | |
460 | "mailbox time last read" when there is a quota error for a maildir | |
461 | delivery. | |
462 | ||
463 | 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei. | |
464 | ||
465 | 35. Added +ignore_unknown as a special item in host lists. | |
466 | ||
467 | 36. Code for decoding IPv6 addresses in host lists is now included, even if | |
468 | IPv6 support is not being compiled. This fixes a bug in which an IPv6 | |
469 | address was recognized as an IP address, but was then not correctly decoded | |
470 | into binary, causing unexpected and incorrect effects when compared with | |
471 | another IP address. | |
472 | ||
473 | ||
474 | Exim version 4.34 | |
475 | ----------------- | |
476 | ||
477 | 1. Very minor rewording of debugging text in manualroute to say "list of | |
478 | hosts" instead of "hostlist". | |
479 | ||
480 | 2. If verify=header_syntax was set, and a header line with an unqualified | |
481 | address (no domain) and a large number of spaces between the end of the | |
482 | name and the colon was received, the reception process suffered a buffer | |
483 | overflow, and (when I tested it) crashed. This was caused by some obsolete | |
484 | code that should have been removed. The fix is to remove it! | |
485 | ||
486 | 3. When running in the test harness, delay a bit after writing a bounce | |
487 | message to get a bit more predictability in the log output. | |
488 | ||
489 | 4. Added a call to search_tidyup() just before forking a reception process. In | |
490 | theory, someone could use a lookup in the expansion of smtp_accept_max_ | |
491 | per_host which, without the tidyup, could leave open a database connection. | |
492 | ||
493 | 5. Added the variables $recipient_data and $sender_data which get set from a | |
494 | lookup success in an ACL "recipients" or "senders" condition, or a router | |
495 | "senders" option, similar to $domain_data and $local_part_data. | |
496 | ||
497 | 6. Moved the writing of debug_print from before to after the "senders" test | |
498 | for routers. | |
499 | ||
500 | 7. Change 4.31/66 (moving the time when the Received: is generated) caused | |
501 | problems for message scanning, either using a data ACL, or using | |
502 | local_scan() because the Received: header was not generated till after they | |
503 | were called (in order to set the time as the time of reception completion). | |
504 | I have revised the way this works. The header is now generated after the | |
505 | body is received, but before the ACL or local_scan() are called. After they | |
506 | are run, the timestamp in the header is updated. | |
507 | ||
508 | ||
509 | Exim version 4.33 | |
510 | ----------------- | |
511 | ||
512 | 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled | |
513 | before starting a queue runner without re-exec. This happened only when | |
514 | deliver_drop_privilege was set or when the Exim user was set to root. The | |
515 | effect of the bug was that timeouts during subsequent deliveries caused | |
516 | crashes instead of being properly handled. The handler is now left at its | |
517 | default (and expected) setting. | |
518 | ||
519 | 2. The other case in which a daemon avoids a re-exec is to deliver an incoming | |
520 | message, again when deliver_drop_privilege is set or Exim is run as root. | |
521 | The bug described in (1) was not present in this case, but the tidying up | |
522 | of the other signals was missing. I have made the two cases consistent. | |
523 | ||
524 | 3. The ignore_target_hosts setting on a manualroute router was being ignored | |
525 | for hosts that were looked up using the /MX notation. | |
526 | ||
527 | 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary | |
528 | in domain lists. | |
529 | ||
530 | 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that | |
531 | operated on the sender address. After changing the $sender_address to <> | |
532 | for the sender address verify, Exim was re-instated it as the original | |
533 | (before rewriting) address, but remembering that it had rewritten it, so it | |
534 | wasn't rewriting it again. This bug also had the effect of breaking the | |
535 | sender address verification caching when the sender address was rewritten. | |
536 | ||
537 | 6. The ignore_target_hosts option was being ignored by the ipliteral router. | |
538 | This has been changed so that if the ip literal address matches | |
539 | ignore_target_hosts, the router declines. | |
540 | ||
541 | 7. Added expansion conditions match_domain, match_address, and match_local_ | |
542 | part (NOT match_host). | |
543 | ||
544 | 8. The placeholder for the Received: header didn't have a length field set. | |
545 | ||
546 | 9. Added code to Exim itself and to exim_lock to test for a specific race | |
547 | condition that could lead to file corruption when using MBX delivery. The | |
548 | issue is with the lockfile that is created in /tmp. If this file is removed | |
549 | after a process has opened it but before that process has acquired a lock, | |
550 | there is the potential for a second process to recreate the file and also | |
551 | acquire a lock. This could lead to two Exim processes writing to the file | |
552 | at the same time. The added code performs the same test as UW imapd; it | |
553 | checks after acquiring the lock that its file descriptor still refers to | |
554 | the same named file. | |
555 | ||
556 | 10. The buffer for building added header lines was of fixed size, 8192 bytes. | |
557 | It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted | |
558 | when Exim is built. | |
559 | ||
560 | 11. Added the smtp_active_hostname option. If used, this will typically be made | |
561 | to depend on the incoming interface address. Because $interface_address is | |
562 | not set up until the daemon has forked a reception process, error responses | |
563 | that can happen earlier (such as "too many connections") no longer contain | |
564 | a host name. | |
565 | ||
566 | 12. If an expansion in a condition on a "warn" statement fails because a lookup | |
567 | defers, the "warn" statement is abandoned, and the next ACL statement is | |
568 | processed. Previously this caused the whole ACL to be aborted. | |
569 | ||
570 | 13. Added the iplsearch lookup type. | |
571 | ||
572 | 14. Added ident_timeout as a log selector. | |
573 | ||
574 | 15. Added tls_certificate_verified as a log selector. | |
575 | ||
576 | 16. Added a global option tls_require_ciphers (compare the smtp transport | |
577 | option of the same name). This controls incoming TLS connections. | |
578 | ||
579 | 17. I finally figured out how to make tls_require_ciphers do a similar thing | |
580 | in GNUtls to what it does in OpenSSL, that is, set up an appropriate list | |
581 | before starting the TLS session. | |
582 | ||
583 | 18. Tabs are now shown as \t in -bP output. | |
584 | ||
585 | 19. If the log selector return_path_on_delivery was set, Exim crashed when | |
586 | bouncing a message because it had too many Received: header lines. | |
587 | ||
588 | 20. If two routers both had headers_remove settings, and the first one included | |
589 | a superfluous trailing colon, the final name in the first list and the | |
590 | first name in the second list were incorrectly joined into one item (with a | |
591 | colon in the middle). | |
592 | ||
593 | ||
594 | Exim version 4.32 | |
595 | ----------------- | |
596 | ||
597 | 1. Added -C and -D options to the exinext utility, mainly to make it easier | |
598 | to include in the automated testing, but these could be helpful when | |
599 | multiple configurations are in use. | |
600 | ||
601 | 2. The exinext utility was not formatting the output nicely when there was | |
602 | an alternate port involved in the retry record key, nor when there was a | |
603 | message id as well (for retries that were specific to a specific message | |
604 | and a specific host). It was also confused by IPv6 addresses, because of | |
605 | the additional colons they contain. I have fixed the IPv4 problem, and | |
606 | patched it up to do a reasonable job for IPv6. | |
607 | ||
608 | 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during | |
609 | delivery, the log line now contains "pipelined" if PIPELINING was used. | |
610 | ||
611 | 4. An SMTP transport process used to panic and die if the bind() call to set | |
612 | an explicit outgoing interface failed. This has been changed; it is now | |
613 | treated in the same way as a connect() failure. | |
614 | ||
615 | 5. A reference to $sender_host_name in the part of a conditional expansion | |
616 | that was being skipped was still causing a DNS lookup. This no longer | |
617 | occurs. | |
618 | ||
619 | 6. The def: expansion condition was not recognizing references to header lines | |
620 | that used bh_ and bheader_. | |
621 | ||
622 | 7. Added the _cache feature to named lists. | |
623 | ||
624 | 8. The code for checking quota_filecount in the appendfile transport was | |
625 | allowing one more file than it should have been. | |
626 | ||
627 | 9. For compatibility with Sendmail, the command line option | |
628 | ||
629 | -prval:sval | |
630 | ||
631 | is equivalent to | |
632 | ||
633 | -oMr rval -oMs sval | |
634 | ||
635 | and sets the incoming protocol and host name (for trusted callers). The | |
636 | host name and its colon can be omitted when only the protocol is to be set. | |
637 | Note the Exim already has two private options, -pd and -ps, that refer to | |
638 | embedded Perl. It is therefore impossible to set a protocol value of "d" or | |
639 | "s", but I don't think that's a major issue. | |
640 | ||
641 | 10. A number of refactoring changes to the code, none of which should affect | |
642 | Exim's behaviour: | |
643 | ||
644 | (a) The number of logging options was getting close to filling up the | |
645 | 32-bit word that was used as a bit map. I have split them into two classes: | |
646 | those that are passed in the argument to log_write(), and those that are | |
647 | only ever tested independently outside of that function. These are now in | |
648 | separate 32-bit words, so there is plenty of room for expansion again. | |
649 | There is no change in the user interface or the logging behaviour. | |
650 | ||
651 | (b) When building, for example, log lines, the code previously used a | |
652 | macro that called string_cat() twice, in order to add two strings. This is | |
653 | not really sufficiently general. Furthermore, there was one instance where | |
654 | it was actually wrong because one of the argument was used twice, and in | |
655 | one call a function was used. (As it happened, calling the function twice | |
656 | did not affect the overall behaviour.) The macro has been replaced by a | |
657 | function that can join an arbitrary number of extra strings onto a growing | |
658 | string. | |
659 | ||
660 | (c) The code for expansion conditions now uses a table and a binary chop | |
661 | instead of a serial search (which was left over from when there were very | |
662 | few conditions). Also, it now recognizes conditions like "pam" even when | |
663 | the relevant support is not compiled in: a suitably worded error message is | |
664 | given if an attempt is made to use such a condition. | |
665 | ||
666 | 11. Added ${time_interval:xxxxx}. | |
667 | ||
668 | 12. A bug was causing one of the ddress fields not to be passed back correctly | |
669 | from remote delivery subprocesses. The field in question was not being | |
670 | subsequently used, so this caused to problems in practice. | |
671 | ||
672 | 13. Added new log selectors queue_time and deliver_time. | |
673 | ||
674 | 14. Might have fixed a bug in maildirsizefile handling that threw up | |
675 | "unexpected character" debug warnings, and recalculated the data | |
676 | unnecessarily. In any case, I expanded the warning message to give more | |
677 | information. | |
678 | ||
679 | 15. Added the message "Restricted characters in address" to the statements in | |
680 | the default ACL that block characters like @ and % in local parts. | |
681 | ||
682 | 16. Change 71 for release 4.31 proved to be much less benign that I imagined. | |
683 | Three changes have been made: | |
684 | ||
685 | (a) There was a serious bug; a negative response to MAIL caused the whole | |
686 | recipient domain to be cached as invalid, thereby blocking all messages | |
687 | to all local parts at the same domain, from all senders. This bug has | |
688 | been fixed. The domain is no longer cached after a negative response to | |
689 | MAIL if the sender used is not empty. | |
690 | ||
691 | (b) The default behaviour of using MAIL FROM:<> for recipient callouts has | |
692 | been restored. | |
693 | ||
694 | (c) A new callout option, "use_sender" has been added for people who want | |
695 | the modified behaviour. | |
696 | ||
697 | ||
698 | Exim version 4.31 | |
699 | ----------------- | |
700 | ||
701 | 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of | |
702 | Larry Rosenman. | |
703 | ||
704 | 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and | |
705 | indeed breaks things for older releases. | |
706 | ||
707 | 3. Added additional logging to the case where there is a problem reading data | |
708 | from a filter that is running in a subprocess using a pipe, in order to | |
709 | try to track down a specific problem. | |
710 | ||
711 | 4. Testing facility fudge: when running in the test harness and attempting | |
712 | to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes | |
713 | getting "No route to host". Convert this to a timeout. | |
714 | ||
715 | 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler | |
716 | warning. | |
717 | ||
718 | 6. Some OS don't have socklen_t but use size_t instead. This affects the | |
719 | fifth argument of getsockopt() amongst other things. This is now | |
720 | configurable by a macro called SOCKLEN_T which defaults to socklen_t, but | |
721 | can be set for individual OS. I have set it for SunOS5, OSF1, and | |
722 | Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but | |
723 | some earlier ones do not. | |
724 | ||
725 | 7. Change 4.30/15 was not doing the test caselessly. | |
726 | ||
727 | 8. The standard form for an IPv6 address literal was being rejected by address | |
728 | parsing in, for example, MAIL and RCPT commands. An example of this kind of | |
729 | address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts | |
730 | this, as well as the form without the "IPv6" on the front (but only when | |
731 | address literals are enabled, of course). | |
732 | ||
733 | 9. Added some casts to avoid compiler warnings in OS/os.c-Linux. | |
734 | ||
735 | 10. Exim crashed if a message with an empty sender address specified by -f | |
736 | encountered a router with an errors_to setting. This could be provoked only | |
737 | by a command such as | |
738 | ||
739 | exim -f "" ... | |
740 | ||
741 | where an empty string was supplied; "<>" did not hit this bug. | |
742 | ||
743 | 11. Installed PCRE release 4.5. | |
744 | ||
745 | 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name | |
746 | remained set. It is now erased. | |
747 | ||
748 | 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute | |
749 | times from message ids (which are base 36 rather than the normal 62). | |
750 | ||
751 | 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use | |
752 | were being counted as actual protocol errors, and logged if the log | |
753 | selector +smtp_protocol_error was set. One cannot be perfect in this test, | |
754 | but now, if PIPELINING has been advertised, RCPT following a rejected MAIL, | |
755 | and DATA following a set of rejected RCPTs do not count as protocol errors. | |
756 | In other words, Exim assumes they were pipelined, though this may not | |
757 | actually be the case. Of course, in all cases the client gets an | |
758 | appropriate error code. | |
759 | ||
760 | 15. If a lookup fails in an ACL condition, a message about the failure may | |
761 | be available; it is used if testing the ACL cannot continue, because most | |
762 | such messages specify what the cause of the deferral is. However, some | |
763 | messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug | |
764 | that caused an old message to be retained and used if a later statement | |
765 | caused a defer, replacing the real cause of the deferral. | |
766 | ||
767 | 16. If an IP address had so many PTR records that the DNS lookup buffer | |
768 | was not large enough to hold them, Exim could crash while trying to process | |
769 | the truncated data. It now detects and logs this case. | |
770 | ||
771 | 17. Further to 4.21/58, another change has been made: if (and only if) the | |
772 | first line of a message (the first header line) ends with CRLF, a bare LF | |
773 | in a subsequent header line has a space inserted after it, so as not to | |
774 | terminate the header. | |
775 | ||
776 | 18. Refactoring: tidied an ugly bit of code in appendfile that copied data | |
777 | unnecessarily, used atoi() instead of strtol(), and didn't check the | |
778 | termination when getting file sizes from file names by regex. | |
779 | ||
780 | 19. Completely re-implemented the support for maildirsize files, in the light | |
781 | of a number of problems with the previous contributed implementation | |
782 | (4.30/29). In particular: | |
783 | ||
784 | . If the quota is zero, the maildirsize file is maintained, but no quota is | |
785 | imposed. | |
786 | ||
787 | . If the maildir directory does not exist, it is created before any attempt | |
788 | to write a maildirsize file. | |
789 | ||
790 | . The quota value in the file is just a cache; if the quota is changed in | |
791 | the transport, the new value overrides. | |
792 | ||
793 | . A regular expression is available for excluding directories from the | |
794 | count. | |
795 | ||
796 | 20. The autoreply transport checks the characters in options that define the | |
797 | message's headers; it allows continued headers, but it was checking with | |
798 | isspace() after an embedded newline instead of explicitly looking for a | |
799 | space or a tab. | |
800 | ||
801 | 21. If all the "regular" hosts to which an address was routed had passed their | |
802 | expiry times, and had not reached their retry times, the address was | |
803 | bounced, even if fallback hosts were defined. Now Exim should go on to try | |
804 | the fallback hosts. | |
805 | ||
806 | 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the | |
807 | equivalent code in the SMTP transport. Some hosts send humungous responses | |
808 | to HELO/EHLO, more than 1024 it seems. | |
809 | ||
810 | 23. Refactoring: code in filter.c used (void *) for "any old type" but this | |
811 | gives compiler warnings in some environments. I've now done it "properly", | |
812 | using a union. | |
813 | ||
814 | 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems | |
815 | (because of problems with the built-in one) was declared to return uschar * | |
816 | instead of char *, causing compiler failure. | |
817 | ||
818 | 25. Fixed a file descriptor leak when processing alias/forward files. | |
819 | ||
820 | 26. Fixed a minor format string issue in dbfn.c. | |
821 | ||
822 | 27. Typo in exim.c: ("dmbnz" for "dbmnz"). | |
823 | ||
824 | 28. If a filter file refered to $h_xxx or $message_headers, and the headers | |
825 | contained RFC 2047 "words", Exim's memory could, under certain conditions, | |
826 | become corrupted. | |
827 | ||
828 | 29. When a sender address is verified, it is cached, to save repeating the test | |
829 | when there is more than one recipient in a message. However, when the | |
830 | verification involves a callout, it is possible for different callout | |
831 | options to be set for different recipients. It is too complicated to keep | |
832 | track of this in the cache, so now Exim always runs a verification when a | |
833 | callout is required, relying on the callout cache for the optimization. | |
834 | The overhead is duplication of the address routing, but this should not be | |
835 | too great. | |
836 | ||
837 | 30. Fixed a bug in callout caching. If a RCPT command caused the sender address | |
838 | to be verified with callout=postmaster, and the main callout worked but the | |
839 | postmaster check failed, the verification correctly failed. However, if a | |
840 | subsequent RCPT command asked for sender verification *without* the | |
841 | postmaster check, incorrect caching caused this verification also to fail, | |
842 | incorrectly. | |
843 | ||
844 | 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however, | |
845 | it was not caching the DNS options (qualify_single, search_parents) that | |
846 | were used when the lookup failed. A subsequent lookup with different | |
847 | options therefore always gave the same answer, though there were cases | |
848 | where it should not have. (Example: a "domains = !$mx_any" option on a | |
849 | dnslookup router: the "domains" option is always processed without any | |
850 | widening, but the router might have qualify_single set.) Now Exim uses the | |
851 | cached value only when the same options are set. | |
852 | ||
853 | 32. Added John Jetmore's "exipick" utility to the distribution. | |
854 | ||
855 | 33. GnuTLS: When an attempt to start a TLS session fails for any reason other | |
856 | than a timeout (e.g. a certificate is required, and is not provided), an | |
857 | Exim server now closes the connection immediately. Previously it waited for | |
858 | the client to close - but if the client is SSL, it seems that they each | |
859 | wait for each other, leading to a delay before one of them times out. | |
860 | ||
861 | 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not | |
862 | maintained 0.8.x compatibility because I don't think many are using it, and | |
863 | it is clearly obsolete. | |
864 | ||
865 | 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp | |
866 | transport. | |
867 | ||
868 | 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the | |
869 | client certificate was expired. A simple patch fixes this, though I don't | |
870 | understand the full logic of why the verify callback is called multiple | |
871 | times. | |
872 | ||
873 | 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround. | |
874 | Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature, | |
875 | which causes problems with some clients (such as the Certicom SSL Plus | |
876 | library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS, | |
877 | disables the coutermeasure allowing Eudora to connect." | |
878 | ||
879 | 38. Exim was not checking that a write() to a log file succeeded. This could | |
880 | lead to Bad Things if a log got too big, in particular if it hit a file | |
881 | size limit. Exim now panics and dies if it cannot write to a log file, just | |
882 | as it does if it cannot open a log file. | |
883 | ||
884 | 39. Modified OS/Makefile-Linux so that it now contains | |
885 | ||
886 | CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE | |
887 | ||
888 | The two -D definitions ensure that Exim is compiled with large file | |
889 | support, which makes it possible to handle log files that are bigger than | |
890 | 2^31. | |
891 | ||
892 | 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for | |
893 | instance) a domain was checked against a named list that involved a lookup, | |
894 | causing $domain_data to be set, then another domain was checked against the | |
895 | same list, then the first domain was re-checked, the value of $domain_data | |
896 | after the final check could be wrong. In particular, if the second check | |
897 | failed, it could be set empty. This bug probably also applied to | |
898 | $localpart_data. | |
899 | ||
900 | 41. The strip_trailing_dot option was not being applied to the address given | |
901 | with the -f command-line option. | |
902 | ||
903 | 42. The code for reading a message's header from the spool was incrementing | |
904 | $received_count, but never initializing it. This meant that the value was | |
905 | incorrect (doubled) while delivering a message in the same process in which | |
906 | it was received. In the most common configuration of Exim, this never | |
907 | happens - a fresh exec is done - but it can happen when | |
908 | deliver_drop_privilege is set. | |
909 | ||
910 | 43. When Exim logs an SMTP synchronization error - client data sent too soon - | |
911 | it now includes up to 150 characters of the unexpected data in the log | |
912 | line. | |
913 | ||
914 | 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines | |
915 | and building data strings. The size of both of these buffers was 10 000 | |
916 | bytes - far larger than anybody would *ever* want, thought I. Needless to | |
917 | say, somebody hit the limit. I have increased the maximum line length to | |
918 | 20 000 and the maximum data length of concatenated lines to 100 000. I have | |
919 | also fixed two bugs, because there was no checking on these buffers. Tsk, | |
920 | tsk. Now exim_dbmbuild gives a message and exits with an error code if a | |
921 | buffer is too small. | |
922 | ||
923 | 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in | |
924 | lsearch lookups. Now it does. | |
925 | ||
926 | 46. When parsing a route_list item in a manualroute router, a fixed-length | |
927 | buffer was used for the list of hosts. I made this 1024 bytes long, | |
928 | thinking that nobody would ever have a list of hosts that long. Wrong. | |
929 | Somebody had a whole pile of complicated expansion conditions, and the | |
930 | string was silently truncated, leading to an expansion error. It turns out | |
931 | that it is easier to change to an unlimited length (owing to other changes | |
932 | that have happened since this code was originally written) than to build | |
933 | structure for giving a limitation error. The length of the item that | |
934 | expands into the list of hosts is now unlimited. | |
935 | ||
936 | 47. The lsearch lookup could not handle data where the length of text line was | |
937 | more than 4095 characters. Such lines were truncated, leading to shortened | |
938 | data being returned. It should now handle lines of any length. | |
939 | ||
940 | 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test | |
941 | xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA | |
942 | ACL"). | |
943 | ||
944 | 49. Cosmetic tidy to scripts like exicyclog that are generated by globally | |
945 | replacing strings such as BIN_DIRECTORY in a source file: the replacement | |
946 | no longer happens in comment lines. A list of replacements is now placed | |
947 | at the head of all of the source files, except those whose only change is | |
948 | to replace PERL_COMMAND in the very first #! line. | |
949 | ||
950 | 50. Replaced the slow insertion sort in queue.c, for sorting the list of | |
951 | messages on the queue, with a bottom-up merge sort, using code contributed | |
952 | by Michael Haardt. This should make operations like -bp somewhat faster on | |
953 | large queues. It won't affect queue runners, except when queue_run_in_order | |
954 | is set. | |
955 | ||
956 | 51. Installed eximstats 1.31 in the distribution. | |
957 | ||
958 | 52. Added support for SRV lookups to the dnslookup router. | |
959 | ||
960 | 53. If an ACL referred to $message_body or $message_body_end, the value was not | |
961 | reset for any messages that followed in the same SMTP session. | |
962 | ||
963 | 54. The store-handling optimization for building very long strings was not | |
964 | differentiating between the different store pools. I don't think this | |
965 | actually made any difference in practice, but I've tidied it. | |
966 | ||
967 | 55. While running the routers to verify a sender address, $sender_address | |
968 | was still set to the sender address. This is wrong, because when routing to | |
969 | send a bounce to the sender, it would be empty. Therefore, I have changed | |
970 | it so that, while verifying a sender address, $sender_address is set to <>. | |
971 | (There is no change to what happens when verifying a recipient address.) | |
972 | ||
973 | 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the | |
974 | target A or AAAA records (if not already returned) without resetting the | |
975 | qualify_single or search_parents options of the DNS resolver. These are | |
976 | inappropriate in this case because the targets of MX and SRV records must | |
977 | be FQDNs. A broken DNS record could cause trouble if it happened to have a | |
978 | target that, when qualified, matched something in the local domain. These | |
979 | two options are now turned off when doing these lookups. | |
980 | ||
981 | 57. It seems that at least some releases of Reiserfs (which does not have the | |
982 | concept of a fixed number of inodes) returns zero and not -1 for the | |
983 | number of available inodes. This interacted badly with check_spool_inodes, | |
984 | which assumed that -1 was the "no such thing" setting. What I have done is | |
985 | to check that the total number of inodes is greater than zero before doing | |
986 | the test of how many are available. | |
987 | ||
988 | 58. When a "warn" ACL statement has a log_message modifier, the message is | |
989 | remembered, and not repeated. This is to avoid a lot of repetition when a | |
990 | message has many recipients that cause the same warning to be written. | |
991 | Howewer, Exim was preserving the list of already written lines for an | |
992 | entire SMTP session, which doesn't seem right. The memory is now reset if a | |
993 | new message is started. | |
994 | ||
995 | 59. The "rewrite" debugging flag was not showing the result of rewriting in the | |
996 | debugging output unless log_rewrite was also set. | |
997 | ||
998 | 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use | |
999 | of (int)(handle) when we know that handle contains (void *)(-1). | |
1000 | ||
1001 | 61. The Exim daemon panic-logs an error return when it closes the incoming | |
1002 | connection. However "connection reset by peer" seems to be common, and | |
1003 | isn't really an error worthy of noting specially, so that particular error | |
1004 | is no long logged. | |
1005 | ||
1006 | 62. When Exim is trying to find all the local interfaces, it used to panic and | |
1007 | die if the ioctl to get the interface flags failed. However, it seems that | |
1008 | on at least one OS (Solaris 9) it is possible to have an interface that is | |
1009 | included in the list of interfaces, but for which you get a failure error | |
1010 | for this call. This happens when the interface is not "plumbed" into a | |
1011 | protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a | |
1012 | failure of the "get flags" call assumes that the interface is down. | |
1013 | ||
1014 | 63. Added a ${eval10: operator, which assumes all numbers are decimal. This | |
1015 | makes life easier for people who are doing arithmetic on fields extracted | |
1016 | from dates, where you often get leading zeros that should not be | |
1017 | interpreted as octal. | |
1018 | ||
1019 | 64. Added qualify_domain to the redirect router, to override the global | |
1020 | setting. | |
1021 | ||
1022 | 65. If a pathologically long header line contained very many addresses (the | |
1023 | report of this problem mentioned 10 000) and each of them was rewritten, | |
1024 | Exim could use up a very large amount of memory. (It kept on making new | |
1025 | copies of the header line as it rewrote, and never released the old ones.) | |
1026 | At the expense of a bit more processing, the header rewriting function has | |
1027 | been changed so that it no longer eats memory in this way. | |
1028 | ||
1029 | 66. The generation of the Received: header has been moved from the time that a | |
1030 | message starts to be received, to the time that it finishes. The timestamp | |
1031 | in the Received: header should now be very close to that of the <= log | |
1032 | line. There are two side-effects of this change: | |
1033 | ||
1034 | (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the | |
1035 | logged header lines no longer include the local Received: line, because | |
1036 | it has not yet been created. The same applies to a copy of the message | |
1037 | that is returned to a non-SMTP sender when a message is rejected. | |
1038 | ||
1039 | (b) When a filter file is tested using -bf, no additional Received: header | |
1040 | is added to the test message. After some thought, I decided that this | |
1041 | is a bug fix. | |
1042 | ||
1043 | This change does not affect the value of $received_for. It is still set | |
1044 | after address rewriting, but before local_scan() is called. | |
1045 | ||
1046 | 67. Installed the latest Cygwin-specific files from the Cygwin maintainer. | |
1047 | ||
1048 | 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS | |
1049 | gave an unhelpful panic error message, and a defer error. I have managed to | |
1050 | change this behaviour so that it now rejects any supplied certificate, | |
1051 | which seems right, as the list of acceptable certificates is empty. | |
1052 | ||
1053 | 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL | |
1054 | gave an unhelpful defer error. I have not managed to make this reject any | |
1055 | supplied certificates, but the error message it gives is "no certificate | |
1056 | supplied", which is not helpful. | |
1057 | ||
1058 | 70. exigrep's output now also includes lines that are not associated with any | |
1059 | message, but which match the given pattern. Implemented by a patch from | |
1060 | Martin Sluka, which also tidied up the Perl a bit. | |
1061 | ||
1062 | 71. Recipient callout verification, like sender verification, was using <> in | |
1063 | the MAIL FROM command. This isn't really the right thing, since the actual | |
1064 | sender may affect whether the remote host accepts the recipient or not. I | |
1065 | have changed it to use the actual sender in the callout; this means that | |
1066 | the cache record is now keyed on a recipient/sender pair, not just the | |
1067 | recipient address. There doesn't seem to be a real danger of callout loops, | |
1068 | since a callout by the remote host to check the sender would use <>. | |
1069 | [SEE ABOVE: changed after hitting problems.] | |
1070 | ||
1071 | 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as | |
1072 | temporary errors. However, in the case of such a code being given after | |
1073 | the end of a data transmission (i.e. after ".") Exim was failing to write | |
1074 | a retry record for the message. (Yes, there was some broken host that was | |
1075 | actually sending 8xx at this point.) | |
1076 | ||
1077 | 73. An unknown lookup type in a host list could cause Exim to panic-die when | |
1078 | the list was checked. (An example that provoked this was putting <; in the | |
1079 | middle of a list instead of at the start.) If this happened during a DATA | |
1080 | ACL check, a -D file could be left lying around. This kind of configuration | |
1081 | error no longer causes Exim to die; instead it causes a defer errror. The | |
1082 | incident is still logged to the main and panic logs. | |
1083 | ||
1084 | 74. Buglet left over from Exim 3 conversion. The message "too many messages | |
1085 | in one connection" was written to the rejectlog but not the mainlog, except | |
1086 | when address rewriting (yes!) was being logged. | |
1087 | ||
1088 | 75. Added write_rejectlog option. | |
1089 | ||
1090 | 76. When a system filter was run not as root (that is, when system_filter_user | |
1091 | was set), the values of the $n variables were not being returned to the | |
1092 | main process; thus, they were not subsequently available in the $sn | |
1093 | variables. | |
1094 | ||
1095 | 77. Added +return_path_on_delivery log selector. | |
1096 | ||
1097 | 78. A connection timeout was being treated differently from recipients deferred | |
1098 | when testing hosts_max_try with a message that was older than the host's | |
1099 | retry timeout. (The host should not be counted, thus allowing all hosts to | |
1100 | be tried at least once before bouncing.) This may have been the cause of an | |
1101 | occasionally reported bug whereby a message would remain on the queue | |
1102 | longer than the retry timeout, but would be bounced if a delivery was | |
1103 | forced. I say "may" because I never totally pinned down the problem; | |
1104 | setting up timeout/retry tests is difficult. See also the next item. | |
1105 | ||
1106 | 79. The ultimate address timeout was not being applied to errors that involved | |
1107 | a combination of host plus message (for example, a timeout on a MAIL | |
1108 | command). When an address resolved to a number of possible hosts, and they | |
1109 | were not all tried for each delivery (e.g. because of hosts_max_try), a | |
1110 | message could remain on the queue longer than the retry timeout. | |
1111 | ||
1112 | 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael | |
1113 | Haardt. | |
1114 | ||
1115 | 81. Fixed an obscure SMTP outgoing bug which required at least the following | |
1116 | conditions: (a) there was another message waiting for the same server; | |
1117 | (b) the server returned 5xx to all RCPT commands in the first message so | |
1118 | that the message was not completed; (c) the server dropped the connection | |
1119 | or gave a negative response to the RSET that Exim sends to abort the | |
1120 | transaction. The observed case was a dropped connection after DATA that had | |
1121 | been sent in pipelining mode. That is, the server had advertised PIPELINING | |
1122 | but was not implementing it correctly. The effect of the bug was incorrect | |
1123 | behaviour, such as trying another host, and this could lead to a crash. | |
1124 | ||
1125 | ||
1126 | Exim version 4.30 | |
1127 | ----------------- | |
1128 | ||
1129 | 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c | |
1130 | and daemon.c were passed as pointers to ints; they should have been | |
1131 | pointers to socklen_t variables (which are typically unsigned ints). | |
1132 | ||
1133 | 2. Some signed/unsigned type warnings in the os.c file for Linux have been | |
1134 | fixed. | |
1135 | ||
1136 | 3. Fixed a really odd bug that affected only the testing scheme; patching a | |
1137 | certain fixed string in the binary changed the value of another string that | |
1138 | happened to be identical to the end of the original first string. | |
1139 | ||
1140 | 4. When gethostbyname() (or equivalent) is passed an IP address as a "host | |
1141 | name", it returns that address as the IP address. On some operating | |
1142 | systems (e.g. Solaris), it also passes back the IP address string as the | |
1143 | "host name". However, on others (e.g. Linux), it passes back an empty | |
1144 | string. Exim wasn't checking for this, and was changing the host name to an | |
1145 | empty string, assuming it had been canonicized. | |
1146 | ||
1147 | 5. Although rare, it is permitted to have more than one PTR record for a given | |
1148 | IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave | |
1149 | all the names associated with an address, because they do in Solaris. | |
1150 | However, it seems that they do not in Linux for data that comes from the | |
1151 | DNS. If an address in /etc/hosts has multiple names, they _are_ all given. | |
1152 | I found this out when I moved to a new Linux workstation and tried to run | |
1153 | the Exim test suite. | |
1154 | ||
1155 | To get round this problem I have changed the code so that it now does its | |
1156 | own call to the DNS to look up PTR records when searching for a host name. | |
1157 | If nothing can be found in the DNS, it tries gethostbyaddr(), so that | |
1158 | addresses that are only in /etc/hosts are still found. | |
1159 | ||
1160 | This behaviour is, however, controlled by an option called host_lookup_ | |
1161 | order, which defaults to "bydns:byaddr". If people want to use the other | |
1162 | order, or indeed, just use one or the other means of lookup, they can | |
1163 | specify it in this variable. | |
1164 | ||
1165 | 6. If a PTR record yields an empty name, Exim treats it as non-existent. In | |
1166 | some operating systems, this comes back from gethostbyaddr() as an empty | |
1167 | string, and this is what Exim used to test for. However, it seems that in | |
1168 | other systems, "." is yielded. Exim now tests for this case too. | |
1169 | ||
1170 | 7. The values of check_spool_space and check_log_space are now held internally | |
1171 | as a number of kilobytes instead of an absolute number of bytes. If a | |
1172 | numbers is specified without 'K' or 'M', it is rounded up to the nearest | |
1173 | kilobyte. This means that much larger values can be stored. | |
1174 | ||
1175 | 8. Exim monitor: an attempt to get the action menu when not actually pointing | |
1176 | at a message produces an empty menu entitled "No message selected". This | |
1177 | works on Solaris (OpenWindows). However, XFree86 does not like a menu with | |
1178 | no entries in it ("Shell widget menu has zero width and/or height"). So I | |
1179 | have added a single, blank menu entry in this case. | |
1180 | ||
1181 | 9. Added ${quote_local_part. | |
1182 | ||
1183 | 10. MIME decoding is now applied to the contents of Subject: header lines when | |
1184 | they are logged. | |
1185 | ||
1186 | 11. Now that a reference to $sender_host_address automatically causes a reverse | |
1187 | lookup to occur if necessary (4.13/18), there is no need to arrange for a | |
1188 | host lookup before query-style lookups in lists that might use this | |
1189 | variable. This has therefore been abolished, and the "net-" prefix is no | |
1190 | longer necessary for query-style lookups. | |
1191 | ||
1192 | 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to | |
1193 | have been a typo for LFLAGS, so it has been changed. | |
1194 | ||
1195 | 13. The install script calls Exim with "-C /dev/null" in order to find the | |
1196 | version number. If ALT_CONFIG_PREFIX was set, this caused an error message | |
1197 | to be output. Howeve, since Exim outputs its version number before the | |
1198 | error, it didn't break the script. It just looked ugly. I fixed this by | |
1199 | always allowing "-C /dev/null" if the caller is root. | |
1200 | ||
1201 | 14. Ignore overlarge ACL variable number when reading spool file - insurance | |
1202 | against a later release with more variables having written the file. | |
1203 | ||
1204 | 15. The standard form for an IPv6 address literal was being rejected by EHLO. | |
1205 | Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts | |
1206 | this, as well as the form without the "IPv6" on the front. | |
1207 | ||
1208 | 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the | |
1209 | OS/Makefile-Darwin file. | |
1210 | ||
1211 | 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied | |
1212 | only to LDAP libraries that do not have LDAP_OPT_DEREF. | |
1213 | ||
1214 | 18. After change 4.21/52, "%ld" was used to format the contents of the $inode | |
1215 | variable. However, some OS use ints for inodes. I've added cast to long int | |
1216 | to get rid of the compiler warning. | |
1217 | ||
1218 | 19. I had forgotten to lock out "/../" in configuration file names when | |
1219 | ALT_CONFIG_PREFIX was set. | |
1220 | ||
1221 | 20. Routers used for verification do not need to specify transports. However, | |
1222 | if such a router generated a host list, and callout was configured, Exim | |
1223 | crashed, because it could not find a port number from the (non-existent) | |
1224 | transport. It now assumes port 25 in this circumstance. | |
1225 | ||
1226 | 21. Added the -t option to exigrep. | |
1227 | ||
1228 | 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch, | |
1229 | wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_ | |
1230 | NWILDLSEARCH are now obsolete, but retained for compatibility. If either of | |
1231 | them is set, LOOKUP_LSEARCH is forced. | |
1232 | ||
1233 | 23. "exim -bV" now outputs a list of lookups that are included in the binary. | |
1234 | ||
1235 | 24. Added sender and host information to the "rejected by local_scan()" log | |
1236 | line; previously there was no indication of these. | |
1237 | ||
1238 | 25. Added .include_if_exists. | |
1239 | ||
1240 | 26. Change 3.952/11 added an explicit directory sync on top of a file sync for | |
1241 | Linux. It turns out that not all file systems support this. Apparently some | |
1242 | versions of NFS do not. (It's rare to put Exim's spool on NFS, but people | |
1243 | do it.) To cope with this, the error EINVAL, which means that sync-ing is | |
1244 | not supported on the file descriptor, is now ignored when Exim is trying to | |
1245 | sync a directory. This applies only to Linux. | |
1246 | ||
1247 | 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin. | |
1248 | ||
1249 | 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in | |
1250 | /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with | |
1251 | this. | |
1252 | ||
1253 | 29. Added support for maildirsize files from supplied patch (modified a bit). | |
1254 | ||
1255 | 30. The use of :fail: followed by an empty string could lead Exim to respond to | |
1256 | sender verification failures with (e.g.): | |
1257 | ||
1258 | 550 Verification failed for <xxx> | |
1259 | 550 Sender verify failed | |
1260 | ||
1261 | where the first response line was missing the '-' that indicates it is not | |
1262 | the final line of the response. | |
1263 | ||
1264 | 31. The loop for finding the name of the user that called Exim had a hardwired | |
1265 | limit of 10; it now uses the value of finduser_retries, which is used for | |
1266 | all other user lookups. | |
1267 | ||
1268 | 32. Added $received_count variable, available in data and not_smtp ACLs, and at | |
1269 | delivery time. | |
1270 | ||
1271 | 33. Exim was neglecting to zero errno before one call of strtol() when | |
1272 | expanding a string and expecting an integer value. On some systems this | |
1273 | resulted in spurious "integer overflow" errors. Also, it was casting the | |
1274 | result into an int without checking. | |
1275 | ||
1276 | 34. Testing for a connection timeout using "timeout_connect" in the retry rules | |
1277 | did not work. The code looks as if it has *never* worked, though it appears | |
1278 | to have been documented since at least releast 1.62. I have made it work. | |
1279 | ||
1280 | 35. The "timeout_DNS" error in retry rules, also documented since at least | |
1281 | 1.62, also never worked. As it isn't clear exactly what this means, and | |
1282 | clearly it isn't a major issue, I have abolished the feature by treating it | |
1283 | as "timeout", and writing a warning to the main and panic logs. | |
1284 | ||
1285 | 36. The display of retry rules for -brt wasn't always showing the error code | |
1286 | correctly. | |
1287 | ||
1288 | 37. Added new error conditions to retry rules: timeout_A, timeout_MX, | |
1289 | timeout_connect_A, timeout_connect_MX. | |
1290 | ||
1291 | 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten | |
1292 | to the empty sender. | |
1293 | ||
1294 | 39. The daemon was not analysing the content of -oX till after it had closed | |
1295 | stderr and disconnected from the controlling terminal. This meant that any | |
1296 | syntax errors were only noted on the panic log, and the return code from | |
1297 | the command was 0. By re-arranging the code a little, I've made the | |
1298 | decoding happen first, so such errors now appear on stderr, and the return | |
1299 | code is 1. However, the actual setting up of the sockets still happens in | |
1300 | the disconnected process, so errors there are still only recorded on the | |
1301 | panic log. | |
1302 | ||
1303 | 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4 | |
1304 | connections (as happens on some IP stacks) was logged at start up time as | |
1305 | just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates | |
1306 | it from "IPv6 and IPv4", which means that two separate sockets are being | |
1307 | used. | |
1308 | ||
1309 | 41. The debug output for gethostbyname2() or getipnodebyname() failures now | |
1310 | says whether AF_INET or AF_INET6 was passed as an argument. | |
1311 | ||
1312 | 42. Exiwhat output was messed up when time zones were included in log | |
1313 | timestamps. | |
1314 | ||
1315 | 43. Exiwhat now gives more information about the daemon's listening ports, | |
1316 | and whether -tls-on-connect was used. | |
1317 | ||
1318 | 44. The "port" option of the smtp transport is now expanded. | |
1319 | ||
1320 | 45. A "message" modifier in a "warn" statement in a non-message ACL was being | |
1321 | silently ignored. Now an error message is written to the main and panic | |
1322 | logs. | |
1323 | ||
1324 | 46. There's a new ACL modifier called "logwrite" which writes to a log file | |
1325 | as soon as it is encountered. | |
1326 | ||
1327 | 47. Added $local_user_uid and $local_user_gid at routing time. | |
1328 | ||
1329 | 48. Exim crashed when trying to verify a sender address that was being | |
1330 | rewritten to "<>". | |
1331 | ||
1332 | 49. Exim was recognizing only a space character after ".include". It now also | |
1333 | recognizes a tab character. | |
1334 | ||
1335 | 50. Fixed several bugs in the Perl script that creates the exim.8 man page by | |
1336 | extracting the relevant information from the specification. The man page no | |
1337 | longer contains scrambled data for the -d option, and I've added a section | |
1338 | at the front about calling Exim under different names. | |
1339 | ||
1340 | 51. Added "extra_headers" argument to the "mail" command in filter files. | |
1341 | ||
1342 | 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to | |
1343 | crash. | |
1344 | ||
1345 | 53. Installed eximstats 1.29. | |
1346 | ||
1347 | 54. Added transport_filter_timeout as a generic transport option. | |
1348 | ||
1349 | 55. Exim no longer adds an empty Bcc: header to messages that have no To: or | |
1350 | Cc: header lines. This was required by RFC 822, but it not required by RFC | |
1351 | 2822. | |
1352 | ||
1353 | 56. Exim used to add From:, Date:, and Message-Id: header lines to any | |
1354 | incoming messages that did not have them. Now it does so only if the | |
1355 | message originates locally, that is, if there is no associated remote host | |
1356 | address. When Resent- header lines are present, this applies to the Resent- | |
1357 | lines rather than the non-Resent- lines. | |
1358 | ||
1359 | 57. Drop incoming SMTP connection after too many syntax or protocol errors. The | |
1360 | limit is controlled by smtp_max_synprot_errors, defaulting to 3. | |
1361 | ||
1362 | 58. Messages for configuration errors now include the name of the main | |
1363 | configuration file - useful now that there may be more than one file in a | |
1364 | list (.included file names were always shown). | |
1365 | ||
1366 | 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems | |
1367 | for those rare installations that do not start the daemon as root or run it | |
1368 | setuid root. I've cut out the call to initgroups() if the daemon is not | |
1369 | root at that time. | |
1370 | ||
1371 | 60. The Exim user and group can now be bound into the binary as text strings | |
1372 | that are looked up at the start of Exim's processing. | |
1373 | ||
1374 | 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel. | |
1375 | ||
1376 | 62. Added $mailstore_basename variable. | |
1377 | ||
1378 | 63. Installed patch to sieve.c from Michael Haardt. | |
1379 | ||
1380 | 64. When Exim failed to open the panic log after failing to open the main log, | |
1381 | the original message it was trying to log was written to stderr and debug | |
1382 | output, but if they were not available (the usual case in production), it | |
1383 | was lost. Now it is written to syslog before the two lines that record the | |
1384 | failures to open the logs. | |
1385 | ||
1386 | 65. Users' Exim filters run in subprocesses under the user's uid. It is | |
1387 | possible for a "deliver" command or an alias in a "personal" command to | |
1388 | provoke an address rewrite. If logging of address rewriting is configured, | |
1389 | this fails because the process is not running as root or exim. There may be | |
1390 | a better way of dealing with this, but for the moment (because 4.30 needs | |
1391 | to be released), I have disabled address rewrite logging when running a | |
1392 | filter in a non-root, non-exim process. | |
1393 | ||
1394 | ||
1395 | Exim version 4.24 | |
1396 | ----------------- | |
1397 | ||
1398 | 1. The buildconfig auxiliary program wasn't quoting the value set for | |
1399 | HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was | |
1400 | not defined. This bug was masked in 4.22 by the effect that was fixed in | |
1401 | change 4.23/1. | |
1402 | ||
1403 | 2. Some messages that were rejected after a message id was allocated were | |
1404 | shown as "incomplete" by exigrep. It no longer does this for messages that | |
1405 | are rejected by local_scan() or the DATA or non-SMTP ACLs. | |
1406 | ||
1407 | 3. If a Message-ID: header used a domain literal in the ID, and Exim did not | |
1408 | have allow_domain_literals set, the ID did not get logged in the <= line. | |
1409 | Domain literals are now always recognized in Message-ID: header lines. | |
1410 | ||
1411 | 4. The first argument for a ${extract expansion item is the key name or field | |
1412 | number. Leading and trailing spaces in this item were not being ignored, | |
1413 | causing some misleading effects. | |
1414 | ||
1415 | 5. When deliver_drop_privilege was set, single queue runner processes started | |
1416 | manually (i.e. by the command "exim -q") or by the daemon (which uses the | |
1417 | same command in the process it spins off) were not dropping privilege. | |
1418 | ||
1419 | 6. When the daemon running as "exim" started a queue runner, it always | |
1420 | re-executed Exim in the spun-off process. This is a waste of effort when | |
1421 | deliver_drop_privilege is set. The new process now just calls the | |
1422 | queue-runner function directly. | |
1423 | ||
1424 | ||
1425 | Exim version 4.23 | |
1426 | ----------------- | |
1427 | ||
1428 | 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of | |
1429 | HEADERS_CHARSET. | |
1430 | ||
1431 | 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being | |
1432 | ignored. Though the use of -oP was forcing the writing of a pid file, it | |
1433 | was always written to the default place. | |
1434 | ||
1435 | 3. If the message "no IP address found for host xxxx" is generated during | |
1436 | incoming verification, it is now followed by identification of the incoming | |
1437 | connection (so you can more easily find what provoked it). | |
1438 | ||
1439 | 4. Bug fix for Sieve filters: "stop" inside a block was not working properly. | |
1440 | ||
1441 | 5. Added some features to "harden" Exim a bit more against certain attacks: | |
1442 | ||
1443 | (a) There is now a build-time option called FIXED_NEVER_USERS that can | |
1444 | be put in Local/Makefile. This is like the never_users runtime option, | |
1445 | but it cannot be overridden. The default setting is "root". | |
1446 | ||
1447 | (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a | |
1448 | prefix string with which any file named in a -C command line option | |
1449 | must start. | |
1450 | ||
1451 | (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege | |
1452 | is retained for -C and -D only if the caller of Exim is root. Without | |
1453 | it, the exim user may also use -C and -D and retain privilege. | |
1454 | ||
1455 | (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D | |
1456 | command line option is disabled. | |
1457 | ||
1458 | 6. Macro names set by the -D option must start with an upper case letter, just | |
1459 | like macro names defined in the configuration file. | |
1460 | ||
1461 | 7. Added "dereference=" facility to LDAP. | |
1462 | ||
1463 | 8. Two instances of the typo "uknown" in the source files are fixed. | |
1464 | ||
1465 | 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line, | |
1466 | the Configure-Makefile script screwed up while processing it. | |
1467 | ||
1468 | 10. Incorporated PCRE 4.4. | |
1469 | ||
1470 | 11. The SMTP synchronization check was not operating right at the start of an | |
1471 | SMTP session. For example, it could not catch a HELO sent before the client | |
1472 | waited for the greeting. There is now a check for outstanding input at the | |
1473 | point when the greeting is written. Because of the duplex, asynchronous | |
1474 | nature of TCP/IP, it cannot be perfect - the incorrect input may be on its | |
1475 | way, but not yet received, when the check is performed. | |
1476 | ||
1477 | 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY | |
1478 | on TCP/IP sockets, because this apparently causes some broken clients to | |
1479 | timeout. | |
1480 | ||
1481 | 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was | |
1482 | unchanged) from the Cygwin maintainer. | |
1483 | ||
1484 | 14. The code for -bV that shows what is in the binary showed "mbx" when maildir | |
1485 | was supported instead of testing for mbx. Effectively a typo. | |
1486 | ||
1487 | 15. The spa authenticator server code was not checking that the input it | |
1488 | received was valid base64. | |
1489 | ||
1490 | 16. The debug output line for the "set" modifier in ACLs was not showing the | |
1491 | name of the variable that was being set. | |
1492 | ||
1493 | 17. Code tidy: the variable type "vtype_string" was never used. Removed it. | |
1494 | ||
1495 | 18. Previously, a reference to $sender_host_name did not cause a DNS reverse | |
1496 | lookup on its own. Something else was needed to trigger the lookup. For | |
1497 | example, a match in host_lookup or the need for a host name in a host list. | |
1498 | Now, if $sender_host_name is referenced and the host name has not yet been | |
1499 | looked up, a lookup is performed. If the lookup fails, the variable remains | |
1500 | empty, and $host_lookup_failed is set to "1". | |
1501 | ||
1502 | 19. Added "eqi" as a case-independent comparison operator. | |
1503 | ||
1504 | 20. The saslauthd authentication condition could segfault if neither service | |
1505 | nor realm was specified. | |
1506 | ||
1507 | 21. If an overflowing value such as "2048M" was set for message_size_limit, the | |
1508 | error message that was logged was misleading, and incoming SMTP | |
1509 | connections were dropped. The message is now more accurate, and temporary | |
1510 | errors are given to SMTP connections. | |
1511 | ||
1512 | 22. In some error situations (such as 21 above) Exim rejects all SMTP commands | |
1513 | (except RSET) with a 421 error, until QUIT is received. However, it was | |
1514 | failing to send a response to QUIT. | |
1515 | ||
1516 | 23. The HELO ACL was being run before the code for helo_try_verify_hosts, | |
1517 | which made it impossible to use "verify = helo" in the HELO ACL. The HELO | |
1518 | ACL is now run after the helo_try_verify_hosts code. | |
1519 | ||
1520 | 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and | |
1521 | "{sha1}" in the "crypteq" expansion condition (in fact the comparison is | |
1522 | case-independent, so other case variants are also recognized). Apparently | |
1523 | some systems use these upper case variants. | |
1524 | ||
1525 | 25. If more than two messages were waiting for the same host, and a transport | |
1526 | filter was specified for the transport, Exim sent two messages over the | |
1527 | same TCP/IP connection, and then failed with "socket operation on non- | |
1528 | socket" when it tried to send the third. | |
1529 | ||
1530 | 26. Added Exim::debug_write and Exim::log_write for embedded Perl use. | |
1531 | ||
1532 | 27. The extern definition of crypt16() in expand.c was not being excluded when | |
1533 | the OS had its own crypt16() function. | |
1534 | ||
1535 | 28. Added bounce_return_body as a new option, and bounce_return_size_limit | |
1536 | as a preferred synonym for return_size_limit, both as an option and as an | |
1537 | expansion variable. | |
1538 | ||
1539 | 29. Added LIBS=-liconv to OS/Makefile-OSF1. | |
1540 | ||
1541 | 30. Changed the default configuration ACL to relax the local part checking rule | |
1542 | for addresses that are not in any local domains. For these addresses, | |
1543 | slashes and pipe symbols are allowed within local parts, but the sequence | |
1544 | /../ is explicitly forbidden. | |
1545 | ||
1546 | 31. SPA server authentication was not clearing the challenge buffer before | |
1547 | using it. | |
1548 | ||
1549 | 32. log_message in a "warn" ACL statement was writing to the reject log as | |
1550 | well as to the main log, which contradicts the documentation and doesn't | |
1551 | seem right (because no rejection is happening). So I have stopped it. | |
1552 | ||
1553 | 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database. | |
1554 | However, I am unable to do any testing of this. | |
1555 | ||
1556 | 34. Fixed an infelicity in the appendfile transport. When checking directories | |
1557 | for a mailbox, to see if any needed to be created, it was accidentally | |
1558 | using path names with one or more superfluous leading slashes; tracing | |
1559 | would show up entries such as stat("///home/ph10", 0xFFBEEA48). | |
1560 | ||
1561 | 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its | |
1562 | contents are added to the log line that is written for every discarded | |
1563 | recipient. (Previously a log_message setting was ignored.) | |
1564 | ||
1565 | 36. The ${quote: operator now quotes the string if it is empty. | |
1566 | ||
1567 | 37. The install script runs exim in order to find its version number. If for | |
1568 | some reason other than non-existence or emptiness, which it checks, it | |
1569 | could not run './exim', it was installing it with an empty version number, | |
1570 | i.e. as "exim-". This error state is now caught, and the installation is | |
1571 | aborted. | |
1572 | ||
1573 | 38. An argument was missing from the function that creates an error message | |
1574 | when Exim fails to connect to the socket for saslauthd authentication. | |
1575 | This could cause Exim to crash, or give a corrupted message. | |
1576 | ||
1577 | 39. Added isip, isip4, and isip6 to ${if conditions. | |
1578 | ||
1579 | 40. The ACL variables $acl_xx are now saved with the message, and can be | |
1580 | accessed later in routers, transports, and filters. | |
1581 | ||
1582 | 41. The new lookup type nwildlsearch is like wildlsearch, except that the key | |
1583 | strings in the file are not string-expanded. | |
1584 | ||
1585 | 42. If a MAIL command specified a SIZE value that was too large to fit into an | |
1586 | int variable, the check against message_size_limit failed. Such values are | |
1587 | now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one | |
1588 | day this will have to be increased, but I don't think I want to be around | |
1589 | when emails are that large. | |
1590 | ||
1591 | ||
1592 | ||
1593 | Exim version 4.22 | |
1594 | ----------------- | |
1595 | ||
1596 | 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that | |
1597 | iconv() is not standard in FreeBSD. | |
1598 | ||
1599 | 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with | |
1600 | IPv6 enabled. The observed symptom was a segmentation fault on return from | |
1601 | the function os_common_find_running_interfaces() in src/os.c. | |
1602 | ||
1603 | 3. In the check_special_case() function in daemon.c I had used "errno" as an | |
1604 | argument name, which causes warnings on some systems. This was basically a | |
1605 | typo, since it was named "eno" in the comments! | |
1606 | ||
1607 | 4. The code that waits for the clock to tick (at a resolution of some fraction | |
1608 | of a second) so as to ensure message-id uniqueness was always waiting for | |
1609 | at least one whole tick, when it could have waited for less. [This is | |
1610 | almost certainly not relevant at current processor speeds, where it is | |
1611 | unlikely to ever wait at all. But we try to future-proof.] | |
1612 | ||
1613 | 5. The function that sleeps for a time interval that includes fractions of a | |
1614 | second contained a race. It did not block SIGALRM between setting the | |
1615 | timer, and suspending (a couple of lines later). If the interval was short | |
1616 | and the sigsuspend() was delayed until after it had expired, the suspension | |
1617 | never ended. On busy systems this could lead to processes getting stuck for | |
1618 | ever. | |
1619 | ||
1620 | 6. Some uncommon configurations may cause a lookup to happen in a queue runner | |
1621 | process, before it forks any delivery processes. The open lookup caching | |
1622 | mechanism meant that the open file or database connection was passed into | |
1623 | the delivery process. The problem was that delivery processes always tidy | |
1624 | up cached lookup data. This could cause a problem for the next delivery | |
1625 | process started by the queue runner, because the external queue runner | |
1626 | process does not know about the closure. So the next delivery process | |
1627 | still has data in the lookup cache. In the case of a file lookup, there was | |
1628 | no problem because closing a file descriptor in a subprocess doesn't affect | |
1629 | the parent. However, if the lookup was caching a connection to a database, | |
1630 | the connection was closed, and the second delivery process was likely to | |
1631 | see errors such as "PGSQL: query failed: server closed the connection | |
1632 | unexpectedly". The problem has been fixed by closing all cached lookups | |
1633 | in a queue runner before running a delivery process. | |
1634 | ||
1635 | 7. Compiler warning on Linux for the second argument of iconv(), which doesn't | |
1636 | seem to have the "const" qualifier which it has on other OS. I've | |
1637 | parameterised it. | |
1638 | ||
1639 | 8. Change 4.21/2 was too strict. It is only if there are two authenticators | |
1640 | *of the same type* (client or server) with the same public name that an | |
1641 | error should be diagnosed. | |
1642 | ||
1643 | 9. When Exim looked up a host name for an IP address, but failed to find the | |
1644 | original IP address when looking up the host name (a safety check), it | |
1645 | output the message "<ip address> does not match any IP for NULL", which was | |
1646 | confusing, to say the least. The bug was that the host name should have | |
1647 | appeared instead of "NULL". | |
1648 | ||
1649 | 10. Since release 3.03, if Exim is called by a uid other than root or the Exim | |
1650 | user that is built into the binary, and the -C or -D options is used, root | |
1651 | privilege is dropped before the configuration file is read. In addition, | |
1652 | logging is switched to stderr instead of the normal log files. If the | |
1653 | configuration then re-defines the Exim user, the unprivileged environment | |
1654 | is probably not what is expected, so Exim logs a panic warning message (but | |
1655 | proceeds). | |
1656 | ||
1657 | However, if deliver_drop_privilege is set, the unprivileged state may well | |
1658 | be exactly what is intended, so the warning has been cut out in that case, | |
1659 | and Exim is allowed to try to write to its normal log files. | |
1660 | ||
1661 | ||
1662 | Exim version 4.21 | |
1663 | ----------------- | |
1664 | ||
1665 | 1. smtp_return_error_details was not giving details for temporary sender | |
1666 | or receiver verification errors. | |
1667 | ||
1668 | 2. Diagnose a configuration error if two authenticators have the same public | |
1669 | name. | |
1670 | ||
1671 | 3. Exim used not to create the message log file for a message until the first | |
1672 | delivery attempt. This could be confusing when incoming messages were held | |
1673 | for policy or load reasons. The message log file is now created at the time | |
1674 | the message is received, and an initial "Received" line is written to it. | |
1675 | ||
1676 | 4. The automatically generated man page for command line options had a minor | |
1677 | bug that caused no ill effects; however, a more serious problem was that | |
1678 | the procedure for building the man page automatically didn't always | |
1679 | operate. Consequently, release 4.20 contains an out-of-date version. This | |
1680 | shouldn't happen again. | |
1681 | ||
1682 | 5. When building Exim with embedded Perl support, the script that builds the | |
1683 | Makefile was calling 'perl' to find its compile-time parameters, ignoring | |
1684 | any setting of PERL_COMMAND in Local/Makefile. This is now fixed. | |
1685 | ||
1686 | 6. The freeze_tell option was not being used for messages that were frozen on | |
1687 | arrival, either by an ACL or by local_scan(). | |
1688 | ||
1689 | 7. Added the smtp_incomplete_transaction log selector. | |
1690 | ||
1691 | 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it | |
1692 | was accepting AUTH without a new EHLO. | |
1693 | ||
1694 | 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other | |
1695 | ESMTP extensions after STARTTLS without a new EHLO, in contravention of the | |
1696 | RFC. | |
1697 | ||
1698 | 10. Logging of TCP/IP connections (when configured) now happens in the main | |
1699 | daemon process instead of the child process, so that the TCP/IP connection | |
1700 | count is more accurate (but it can never be perfect). | |
1701 | ||
1702 | 11. The use of "drop" in a nested ACL was not being handled correctly in the | |
1703 | outer ACL. Now, if condition failure induced by the nested "drop" causes | |
1704 | the outer ACL verb to deny access ("accept" or "discard" after "endpass", | |
1705 | or "require"), the connection is dropped. | |
1706 | ||
1707 | 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL | |
1708 | that yield "discard" can now be used with an "accept" or a "discard" verb, | |
1709 | but an error is generated for any others (because I can't see a useful way | |
1710 | to define what should happen). | |
1711 | ||
1712 | 13. When an ACL is read dynamically from a file (or anywhere else), the lines | |
1713 | are now processed in the same way as lines in the Exim configuration file. | |
1714 | In particular, continuation lines are supported. | |
1715 | ||
1716 | 14. Added the "dnslists = a.b.c!=n.n.n.n" feature. | |
1717 | ||
1718 | 15. Added -ti meaning -t -i. | |
1719 | ||
1720 | 16. Check for letters, digits, hyphens, and dots in the names of dnslist | |
1721 | domains, and warn by logging if others are found. | |
1722 | ||
1723 | 17. At least on BSD, alignment is not guarenteed for the array of ifreq's | |
1724 | returned from GIFCONF when Exim is trying to find the list of interfaces on | |
1725 | a host. The code in os.c has been modified to copy each ifreq to an aligned | |
1726 | structure in all cases. | |
1727 | ||
1728 | Also, in some cases, the returned ifreq's were being copied to a 'struct | |
1729 | ifreq' on the stack, which was subsequently passed to host_ntoa(). That | |
1730 | means the last couple of bytes of an IPv6 address could be chopped if the | |
1731 | ifreq contained only a normal sockaddr (14 bytes storage). | |
1732 | ||
1733 | 18. Named domain lists were not supported in the hosts_treat_as_local option. | |
1734 | An entry such as +xxxx was not recognized, and was treated as a literal | |
1735 | domain name. | |
1736 | ||
1737 | 19. Ensure that header lines added by a DATA ACL are included in the reject log | |
1738 | if the ACL subsequently rejects the message. | |
1739 | ||
1740 | 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just | |
1741 | MD5 (which is deprecated). | |
1742 | ||
1743 | 21. When testing a filter file using -bf, Exim was writing a message when it | |
1744 | took the sender from a "From " line in the message, but it was not doing so | |
1745 | when it took $return_path from a Return-Path: header line. It now does. | |
1746 | ||
1747 | 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin | |
1748 | with a valid header line field name (a series of printing characters | |
1749 | terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning. | |
1750 | ||
1751 | 23. Changed "disc" in the source to "disk" to conform to the documentation and | |
1752 | the book and for uniformity. | |
1753 | ||
1754 | 24. Ignore Sendmail's -Ooption=value command line item. | |
1755 | ||
1756 | 25. When execve() failed while trying to run a command in a pipe transport, | |
1757 | Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this | |
1758 | could be confused with a return value of 69 from the command itself. This | |
1759 | has been changed to 127, the value the shell returns if it is asked to run | |
1760 | a non-existent command. The wording for the related log line suggests a | |
1761 | non-existent command as the problem. | |
1762 | ||
1763 | 26. If received_header_text expands to an empty string, do not add a Received: | |
1764 | header line to the message. (Well, it adds a token one on the spool, but | |
1765 | marks it "old" so that it doesn't get used or transmitted.) | |
1766 | ||
1767 | 27. Installed eximstats 1.28 (addition of -nt option). | |
1768 | ||
1769 | 28. There was no check for failure on the call to getsockname() in the daemon | |
1770 | code. This can fail if there is a shortage of resources on the system, with | |
1771 | ENOMEM, for example. A temporary error is now given on failure. | |
1772 | ||
1773 | 29. Contrary to the C standard, it seems that in some environments, the | |
1774 | equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C | |
1775 | program. Exim now does this explicitly; it affects the formatting of | |
1776 | timestamps using strftime(). | |
1777 | ||
1778 | 30. If exiqsumm was given junk data, it threw up some uninitialized variable | |
1779 | complaints. I've now initialized all the variables, to avoid this. | |
1780 | ||
1781 | 32. Header lines added by a system filter were not being "seen" during | |
1782 | transport-time rewrites. | |
1783 | ||
1784 | 33. The info_callback() function passed to OpenSSL is set up with type void | |
1785 | (*)(SSL *, int, int), as described somewhere. However, when calling the | |
1786 | function (actually a macro) that sets it up, the type void(*)() is | |
1787 | expected. I've put in a cast to prevent warnings from picky compilers. | |
1788 | ||
1789 | 34. If a DNS black list lookup found a CNAME record, but there were no A | |
1790 | records associated with the domain it pointed at, Exim crashed. | |
1791 | ||
1792 | 35. If a DNS black list lookup returned more than one A record, Exim ignored | |
1793 | all but the first. It now scans all returned addresses if a particular IP | |
1794 | value is being sought. In this situation, the contents of the | |
1795 | $dnslist_value variable are a list of all the addresses, separated by a | |
1796 | comma and a space. | |
1797 | ||
1798 | 36. Tightened up the rules for host name lookups using reverse DNS. Exim used | |
1799 | to accept a host name and all its aliases if the forward lookup for any of | |
1800 | them yielded the IP address of the incoming connection. Now it accepts only | |
1801 | those names whose forward lookup yields the correct IP address. Any other | |
1802 | names are discarded. This closes a loophole whereby a rogue DNS | |
1803 | administrator could create reverse DNS records to break through a | |
1804 | wildcarded host restriction in an ACL. | |
1805 | ||
1806 | 37. If a user filter or a system filter that ran in a subprocess used any of | |
1807 | the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command, | |
1808 | the wrong values were passed to the pipe command ($thisaddress had the | |
1809 | value of $0, $0 had the value of $1, etc). This bug was introduced by | |
1810 | change 4.11/101, and not discovered because I wrote an inadequate test. :-( | |
1811 | ||
1812 | 38. Improved the line breaking for long SMTP error messages from ACLs. | |
1813 | Previously, if there was no break point between 40 and 75 characters, Exim | |
1814 | left the rest of the message alone. Two changes have been made: (a) I've | |
1815 | reduced the minimum length to 35 characters; (b) if it can't find a break | |
1816 | point between 35 and 75 characters, it looks ahead and uses the first one | |
1817 | that it finds. This may give the occasional overlong line, but at least the | |
1818 | remaining text gets split now. | |
1819 | ||
1820 | 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of | |
1821 | file descriptors might be low, and that setting 1000 would always raise it. | |
1822 | It turns out that in some environments, the limit is already over 1000 and | |
1823 | that lowering it causes trouble. So now Exim takes care not to decrease it. | |
1824 | ||
1825 | 40. When delivering a message, the value of $return_path is set to $sender_ | |
1826 | address at the start of routing (routers may change the value). By an | |
1827 | oversight, this default was not being set up when an address was tested by | |
1828 | -bt or -bv, which affected the outcome if any router or filter referred to | |
1829 | $return_path. | |
1830 | ||
1831 | 41. The idea of the "warn" ACL verb is that it adds a header or writes to the | |
1832 | log only when "message" or "log_message" are set. However, if one of the | |
1833 | conditions was an address verification, or a call to a nested ACL, the | |
1834 | messages generated by the underlying test were being passed through. This | |
1835 | no longer happens. The underlying message is available in $acl_verify_ | |
1836 | message for both "message" and "log_message" expansions, so it can be | |
1837 | passed through if needed. | |
1838 | ||
1839 | 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a | |
1840 | new expansion $bh_ to give the encoded byte string without charset | |
1841 | translation. Translation happens only if iconv() is available; HAVE_ICONV | |
1842 | indicates this at build time. HEADERS_CHARSET gives the charset to | |
1843 | translate to; headers_charset can change it in the configuration, and | |
1844 | "headers charset" can change it in an individual filter file. | |
1845 | ||
1846 | 43. Now that we have a default RFC 2047 charset (see above), the code in Exim | |
1847 | that creates RFC 2047 encoded "words" labels them as that charset instead | |
1848 | of always using iso-8859-1. The cases are (i) the explicit ${rfc2047: | |
1849 | expansion operator; (ii) when Exim creates a From: line for a local | |
1850 | message; (iii) when a header line is rewritten to include a "phrase" part. | |
1851 | ||
1852 | 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was | |
1853 | buggy, causing it to skip the first lines of messages whose message ID | |
1854 | ended in 'D'. This would not have bitten before Exim release 4.14, because | |
1855 | message IDs were unlikely to end in 'D' before then. The effect was to have | |
1856 | incorrect size information for certain domains. | |
1857 | ||
1858 | 45. #include "config.h" was missing at the start of the crypt16.c module. This | |
1859 | caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not | |
1860 | noticed. | |
1861 | ||
1862 | 46. If there was a timeout during a "random" callout check, Exim treated it as | |
1863 | a failure of the random address, and carried on sending RSET and the real | |
1864 | address. If the delay was just some slowness somewhere, the response to the | |
1865 | original RCPT would be taken as a response to RSET and so on, causing | |
1866 | mayhem of various kinds. | |
1867 | ||
1868 | 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking | |
1869 | when I implemented it. It didn't allow for the fact that some option values | |
1870 | may legitimatetly be negative (e.g. size_addition), and it didn't even do | |
1871 | the right test for positive values. | |
1872 | ||
1873 | 48. Domain names in DNS records are case-independent. Exim always looks them up | |
1874 | in lower case. Some resolvers return domain names in exactly the case they | |
1875 | appear in the zone file, that is, they may contain uppercase letters. Not | |
1876 | all resolvers do this - some return always lower case. Exim was treating a | |
1877 | change of case by a resolver as a change of domain, similar to a widening | |
1878 | of a domain abbreviation. This triggered its re-routing code and so it was | |
1879 | trying to route what was effectively the same domain again. This normally | |
1880 | caused routing to fail (because the router wouldn't handle the domain | |
1881 | twice). Now Exim checks for this case specially, and just changes the | |
1882 | casing of the domain that it ultimately uses when it transmits the message | |
1883 | envelope. | |
1884 | ||
1885 | 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed | |
1886 | module. | |
1887 | ||
1888 | 50. If a filter generated a file delivery with a non-absolute name (possible if | |
1889 | no home directory exists for the router), the forbid_file option was not | |
1890 | forbidding it. | |
1891 | ||
1892 | 51. Added '&' feature to dnslists, to provide bit mask matching in addition to | |
1893 | the existing equality matching. | |
1894 | ||
1895 | 52. Exim was using ints instead of ino_t variables in some places where it was | |
1896 | dealing with inode numbers. | |
1897 | ||
1898 | 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is | |
1899 | TMPDIR="/tmp"), Exim checks for the presence of an environment variable | |
1900 | called TMPDIR, and if it finds it is different, it changes its value. | |
1901 | ||
1902 | 54. The smtp_printf() function is now made available to local_scan() so | |
1903 | additional output lines can be written before returning. There is also an | |
1904 | smtp_fflush() function to enable the detection of a dropped connection. | |
1905 | The variables smtp_input and smtp_batched_input are exported to | |
1906 | local_scan(). | |
1907 | ||
1908 | 55. Changed the default runtime configuration: the message "Unknown user" | |
1909 | has been removed from the ACL, and instead placed on the localuser router, | |
1910 | using the cannot_route_message feature. This means that any verification | |
1911 | failures that generate their own messages won't get overridden. Similarly, | |
1912 | the "Unrouteable address" message that was in the ACL for unverifiable | |
1913 | relay addresses has also been removed. | |
1914 | ||
1915 | 56. Added hosts_avoid_esmtp to the smtp transport. | |
1916 | ||
1917 | 57. The exicyclog script was not checking for the esoteric option | |
1918 | CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it | |
1919 | will work only if exicyclog is run under the appropriate euid. | |
1920 | ||
1921 | 58. Following a discussion on the list, the rules by which Exim recognises line | |
1922 | endings on incoming messages have been changed. The -dropcr and drop_cr | |
1923 | options are now no-ops, retained only for backwards compatibility. The | |
1924 | following line terminators are recognized: LF CRLF CR. However, special | |
1925 | processing applies to CR: | |
1926 | ||
1927 | (i) The sequence CR . CR does *not* terminate an incoming SMTP message, | |
1928 | nor a local message in the state where . is a terminator. | |
1929 | ||
1930 | (ii) If a bare CR is encountered in a header line, an extra space is added | |
1931 | after the line terminator so as not to end the header. The reasoning | |
1932 | behind this is that bare CRs in header lines are most likely either | |
1933 | to be mistakes, or people trying to play silly games. | |
1934 | ||
1935 | 59. The size of a message, as listed by "-bp" or in the Exim monitor window, | |
1936 | was being incorrectly given as 18 bytes larger than it should have been. | |
1937 | This is a VOB (very old bug). | |
1938 | ||
1939 | 60. This may never have affected anything current, but just in case it has: | |
1940 | When the local host is found other than at the start of a list of hosts, | |
1941 | the local host, those with the same MX, and any that follow, are discarded. | |
1942 | When the list in question was part of a longer list of hosts, the following | |
1943 | hosts (not currently being processed) were also being discarded. This no | |
1944 | longer happens. I'm not sure if this situation could ever has previously | |
1945 | arisen. | |
1946 | ||
1947 | 61. Added the "/MX" feature to lists of hosts in the manualroute and query | |
1948 | program routers. | |
1949 | ||
1950 | 62. Whenever Exim generates a new message, it now adds an Auto-Submitted: | |
1951 | header. This is something that is recommended in a new Internet Draft, and | |
1952 | is something that is documented as being done by Sendmail. There are two | |
1953 | possible values. For messages generated by the autoreply transport, Exim | |
1954 | adds: | |
1955 | ||
1956 | Auto-Submitted: auto-replied | |
1957 | ||
1958 | whereas for all other generated messages (e.g. bounces) it adds | |
1959 | ||
1960 | Auto-Submitted: auto-generated | |
1961 | ||
1962 | 63. The "personal" condition in filters now includes a test for the | |
1963 | Auto-Submitted: header. If it contains the string "auto-" the message it | |
1964 | not considered personal. | |
1965 | ||
1966 | 64. Added rcpt_include_affixes as a generic transport option. | |
1967 | ||
1968 | 65. Added queue_only_override (default true). | |
1969 | ||
1970 | 66. Added the syslog_duplication option. | |
1971 | ||
1972 | 67. If what should have been the first header line of a message consisted of | |
1973 | a space followed by a colon, Exim was mis-interpreting it as a header line. | |
1974 | It isn't of course - it is syntactically invalid and should therefore be | |
1975 | treated as the start of the message body. The misbehaviour could have | |
1976 | caused a number of strange effects, including loss of data in subsequent | |
1977 | header lines, and spool format errors. | |
1978 | ||
1979 | 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the | |
1980 | client host had authenticated. This control can now be exercised by an ACL | |
1981 | for more flexibility. | |
1982 | ||
1983 | 69. By default, callouts do not happen when testing with -bh. There is now a | |
1984 | variant, -bhc, which does actually run the callout code, including | |
1985 | consulting and updating the callout cache. | |
1986 | ||
1987 | 70. Added support for saslauthd authentication, courtesy of Alexander | |
1988 | Sabourenkov. | |
1989 | ||
1990 | 71. If statvfs() failed on the spool or log directories while checking their | |
1991 | size for availability, Exim confusingly gave the error "space shortage". | |
1992 | Furthermore, in debugging mode it crashed with a floating point exception. | |
1993 | These checks are done if check_{spool,log}_{space,inodes} are set, and when | |
1994 | an SMTP message arrives with SIZE= on the MAIL command. As this is a really | |
1995 | serious problem, Exim now writes to the main and panic logs when this | |
1996 | happens, with details of the failure. It then refuses to accept the | |
1997 | incoming message, giving the message "spool directory problem" or "log | |
1998 | directory problem" with a 421 code for SMTP messages. | |
1999 | ||
2000 | 72. When Exim is about to re-exec itself, it ensures that the file descriptors | |
2001 | 0, 1, and 2 exist, because some OS complain for execs without them (see | |
2002 | ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these | |
2003 | descriptors. However, the code omitted to check that the open succeeded, | |
2004 | causing mysterious errors if for some reason the permissions on /dev/null | |
2005 | got screwed. Now Exim writes a message to the main and panic logs, and | |
2006 | bombs out if it can't open /dev/null. | |
2007 | ||
2008 | 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and | |
2009 | interact so that it is all more flexible. It is supposed to remain | |
2010 | backwards compatible. Also added extra_local_interfaces. | |
2011 | ||
2012 | 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code | |
2013 | to bomb out with an assertion failure - to the client this appears as a | |
2014 | connection drop. This problem occurs in the part of the code that was taken | |
2015 | from the Samba project. Fortunately, the assertion is in a very simple | |
2016 | function, so I have fixed this by reproducing the function inline in the | |
2017 | one place where it is called, and arranging for authentication to fail | |
2018 | instead of killing the process with assert(). | |
2019 | ||
2020 | 75. The SPA client code was not working when the server requested OEM rather | |
2021 | than Unicode encoding. | |
2022 | ||
2023 | 76. Added code to make require_files with a specific uid setting more usable in | |
2024 | the case where statting the file as root fails - usually a non-root-mounted | |
2025 | NFS file system. When this happens and the failure is EACCES, Exim now | |
2026 | forks a subprocess and does the per-uid checking as the relevant uid. | |
2027 | ||
2028 | 77. Added process_log_path. | |
2029 | ||
2030 | 78. If log_file_path was not explicitly set, a setting of check_log_space or | |
2031 | check_log_inodes was ignored. | |
2032 | ||
2033 | 79. If a space check for the spool or log partitions fails, the incident is now | |
2034 | logged. Of course, in the latter case the data may get lost... | |
2035 | ||
2036 | 80. Added the %p formatting code to string_format() so that it can be used to | |
2037 | print addresses in debug_print(). Adjusted all the address printing in the | |
2038 | debugging in store.c to use %p rather than %d. | |
2039 | ||
2040 | 81. There was a concern that a line of code in smtp_in.c could overflow a | |
2041 | buffer if a HELO/EHLO command was given followed by 500 or so spaces. As | |
2042 | initially expressed, the concern was not well-founded, because trailing | |
2043 | spaces are removed early. However, if the trailing spaces were followed by | |
2044 | a NULL, they did not get removed, so the overflow was possible. Two fixes | |
2045 | were applied: | |
2046 | ||
2047 | (a) I re-wrote the offending code in a cleaner fashion. | |
2048 | (b) If an incoming SMTP command contains a NULL character, it is rejected | |
2049 | as invalid. | |
2050 | ||
2051 | 82. When Exim changes uid/gid to the Exim user at daemon start time, it now | |
2052 | runs initgroups(), so that if the Exim user is in any additional groups, | |
2053 | they will be used during message reception. | |
2054 | ||
2055 | ||
2056 | Exim version 4.20 | |
2057 | ----------------- | |
2058 | ||
2059 | The change log for 4.20 and earlier releases has been archived. | |
2060 | ||
2061 | **** |