Committed exipick version 20050802.0 (added message_exim_id)
[exim.git] / doc / doc-txt / ChangeLog
CommitLineData
ee744174 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.197 2005/08/02 16:12:14 jetmore Exp $
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2
3Change log file for Exim from version 4.21
4-------------------------------------------
5
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6Exim version 4.53
7-----------------
8
9TK/01 Added the "success_on_redirect" address verification option. See
10 NewStuff for rationale and an example.
11
13b685f9
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12PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
13
395ff96d
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14PH/02 Patch to exigrep to allow it to work on syslog lines.
15
5b68f6e4
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16PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
17 fread() to skip over the body file's header line, because in Cygwin the
18 header line is locked and is inaccessible.
19
1ab52c69
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20PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
21 co-exist for some time) to make it clear that it is the Exim ID that is
22 referenced, not the Message-ID: header line.
23
b07e6aa3
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24PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
25 string_format() function, because snprintf() does not exist on all
26 operating systems.
27
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28PH/06 The use of forbid_filter_existstest now also locks out the use of the
29 ${stat: expansion item.
30
3af76a81
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31PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
32 protocol synchronization error", to keep the pedants happy.
33
2548ba04
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34PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
35 well as for IRIX systems, when gcc is being used. See the host.c source
36 file for comments.
37
b6c6011d
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38PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
39
cf39cf57
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40PH/10 Named domain lists were not working if used in a queue_smtp_domains
41 setting.
42
f1513293
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43PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
44 transport and to the smtp transport in LMTP mode.
45
727549a4
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46TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
47
af46795e
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48PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
49 run a filter in a subprocess. This could lead to confusion in subsequent
50 lookups in the parent process. There should also be a search_tidyup() at
51 the end of the subprocess.
52
d7b47fd0
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53PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
54 only if the host matched helo_try_verify_hosts, which caused the
55 verification to occur when the EHLO/HELO command was issued. The ACL just
56 tested the remembered result. Now, if a previous verification attempt has
57 not happened, "verify = helo" does it there and then.
58
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59JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
60
bbe902f0 61
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62Exim version 4.52
63-----------------
64
65TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
66
22c3b60b
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67PH/01 When a transport filter timed out in a pipe delivery, and the pipe
68 command itself ended in error, the underlying message about the transport
69 filter timeout was being overwritten with the pipe command error. Now the
70 underlying error message should be appended to the second error message.
71
06a9b4b5
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72TK/01 Fix poll() being unavailable on Mac OSX 10.2.
73
c1ac6996
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74PH/02 Reduce the amount of output that "make" produces by default. Full output
75 can still be requested.
76
9c7a242c
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77PH/03 The warning log line about a condition test deferring for a "warn" verb
78 was being output only once per connection, rather than after each
79 occurrence (because it was using the same function as for successful
80 "warn" verbs). This seems wrong, so I have changed it.
81
87ba3f5f
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82TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
83 it should not have, which might have caused a crash in the right
84 circumstances, but probably never did.
85
86PH/04 Installed a modified version of Tony Finch's patch to make submission
87 mode fix the return path as well as the Sender: header line, and to
88 add a /name= option so that you can make the user's friendly name appear
89 in the header line.
90
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91TF/03 Added the control = fakedefer ACL modifier.
92
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93TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
94 Mark Lowes for thorough testing.
870f6ba8 95
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96TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
97
98TK/03 Merged latest SRS patch from Miles Wilton.
99
415c8f3b
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100PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
101 with the definition in sysexits.h (which is #included earlier).
102 Fortunately, Exim does not actually use EX_OK. The code used to try to
103 preserve the sysexits.h value, by assumimg that macro definitions were
104 scanned for macro replacements. I have been disabused of this notion,
105 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 106
958541e9
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107PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
108 in the smtp transport. When a block could not be written in a single
109 write() function, the timeout was being re-applied to each part-write.
110 This seems wrong - if the receiver was accepting one byte at a time it
111 would take for ever. The timeout is now adjusted when this happens. It
112 doesn't have to be particularly precise.
113
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114TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
115 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
116
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117PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
118 without a domain if the check to <postmaster@domain> fails.
119
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120SC/01 Eximstats: added -xls and the ability to specify output files
121 (patch written by Frank Heydlauf).
122
123SC/02 Eximstats: use FileHandles for outputing results.
124
125SC/03 Eximstats: allow any combination of xls, txt, and html output.
126
127SC/04 Eximstats: fixed display of large numbers with -nvr option
128
129SC/05 Eximstats: fixed merging of reports with empty tables.
130
131SC/06 Eximstats: added the -include_original_destination flag
132
133SC/07 Eximstats: removed tabs and trailing whitespace.
134
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135TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
136
137TK/06 MBOX spool code: Add real "From " MBOX separator line
138 so the .eml file is really in mbox format (even though
139 most programs do not really care). Patch from Alex Miller.
140
141TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
142 The latter is generated from $received_to and is only set if the
143 message has one envelope recipient. SA can use these headers,
144 obviously out-of-the-box. Patch from Alex Miller.
145
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146PH/08 The ${def test on a variable was returning false if the variable's
147 value was "0", contrary to what the specification has always said!
148 The result should be true unless the variable is empty.
149
150PH/09 The syntax error of a character other than { following "${if
151 def:variable_name" (after optional whitespace) was not being diagnosed.
152 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
153 accidental colon was present, for example, could give incorrect results.
154
0d7eb84a
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155PH/10 Tidied the code in a number of places where the st_size field of a stat()
156 result is used (not including appendfile, where other changes are about
157 to be made).
158
159PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
160 This involved changing a lot of size variables from int to off_t. It
161 should work with maildirs and everything.
162
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163TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
164 spamd dying while we are connected to it.
165
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166TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
167 <jgh@wizmail.org>
168
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169PH/12 Applied Alex Kiernan's patch for the API change for the error callback
170 function for BDB 4.3.
171
ef213c3b
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172PH/13 Changed auto_thaw such that it does not apply to bounce messages.
173
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174PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
175 the sources for PCRE have been re-arranged and more files are now
176 involved.
177
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178PH/15 The code I had for printing potentially long long variables in PH/11
179 above was not the best (it lost precision). The length of off_t variables
180 is now inspected at build time, and an appropriate printing format (%ld
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181 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
182 to be "long long int" or "long int". This is needed for the internal
183 formatting function string_vformat().
b1c749bb 184
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185PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
186 the configuration file to be ":syslog", then the script "guesses" where
187 the logs files are, rather than using the compiled in default. In our
188 case the guess is not the same as the compiled default, so the script
189 suddenly stopped working when I started to use syslog. The patch checks
190 to see if log_file_path is "". If so, it attempts to read it from exim
191 with no configuration file to get the compiled in version, before it
192 falls back to the previous guessing code."
193
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194TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
195 implementing BATV in an Exim configuration. See NewStuff for the gory
196 details.
197
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198PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
199 Makefile that are specific to HP-UX.
200
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201PH/18 If the "use_postmaster" option was set for a recipient callout together
202 with the "random" option, the postmaster address was used as the MAIL
203 FROM address for the random test, but not for the subsequent recipient
204 test. It is now used for both.
205
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206PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
207 patch removes a few documentation additions to RFC 3028, because the
208 latest draft now contains them. It adds the new en;ascii-case comparator
209 and a new error check for 8bit text in MIME parts. Comparator and
210 require names are now matched exactly. I enabled the subaddress
211 extension, but it is not well tested yet (read: it works for me)."
212
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213PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
214 rework some of the code of TK/09 above to avoid the hardwired use of
215 "%lld" and "long long". Replaced the call to snprintf() with a call to
216 string_vformat().
217
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218PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
219 records point to non-existent hosts", "retry timeout exceeded", and
220 "retry time not reached for any host after a long failure period".
ca02eafb 221
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222PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
223 experimental DomainKeys support:
224
225 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
226 (2) On an error such as an illegally used "control", the wrong name for
227 the control was given.
228
229 These problems did NOT occur unless DomainKeys support was compiled.
230
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231PH/23 Added daemon_startup_retries and daemon_startup_sleep.
232
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233PH/24 Added ${if match_ip condition.
234
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235PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
236 databases so that it will be absolutely obvious if a crash occurs in the
237 DB library. This is a regular occurrence (often caused by mis-matched
238 db.h files).
239
ff790e47 240PH/26 Insert a lot of missing (void) casts for functions such as chown(),
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241 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
242 picked up on a user's system that detects such things. There doesn't seem
243 to be a gcc warning option for this - only an attribute that has to be
244 put on the function's prototype. It seems that in Fedora Core 4 they have
245 set this on a number of new functions. No doubt there will be more in due
246 course.
ff790e47 247
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248PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
249 specify a transport. However, if an address that was verified by such a
250 router was the subject of a callout, Exim crashed because it tried to
251 read the rcpt_include_affixes from the non-existent transport. Now it
252 just assumes that the setting of that option is false. This bug was
253 introduced by 4.51/PH/31.
254
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255PH/28 Changed -d+all to exclude +memory, because that information is very
256 rarely of interest, but it makes the output a lot bigger. People tend to
257 do -d+all out of habit.
258
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259PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
260 code in os-type was giving problems when libc.so lives in lib64, like on
261 x86_64 Fedora Core.
262
ade42478
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263PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
264 aren't the modern standard, and it seems that some systems' include files
265 don't always have them. Exim was already checking for some of the newer
266 ones like T_AAAA, and defining it itself. I've added checks for all the
267 record types that Exim uses.
268
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269PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
270 not automatically generating a new one, as it is supposed to. This
271 prevented TLS from working. If the file did exist, but contained invalid
272 data, a new version was generated, as expected. It was only the case of a
273 non-existent file that was broken.
274
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275TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
276 with a change in libdomainkeys > 0.64.
277
278TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
279 from DNS. If the selector record carries the flag, it now has
280 precedence over the domain-wide flag.
281
282TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
283
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284PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
285 the use of a port name that isn't defined in /etc/services) occurred, the
286 message was deferred as in a normal delivery, and thus remained on the
287 spool, instead of being failed because of the mua_wrapper setting. This
288 is now fixed, and I tidied up some of the mua_wrapper messages at the
289 same time.
290
a388bce4
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291SC/08 Eximstats: whilst parsing the mainlog(s), store information about
292 the messages in a hash of arrays rather than using individual hashes.
293 This is a bit cleaner and results in dramatic memory savings, albeit
294 at a slight CPU cost.
295
296SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
297 as requested by Marc Sherman.
298
299SC/10 Eximstats: added histograms for user specified patterns as requested
300 by Marc Sherman.
301
0793e4ed
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302SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
303
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304PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
305 fopen() in the content-scanning modules that did not already have it.
306
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308Exim version 4.51
309-----------------
310
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311TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
312 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
313
2f079f46 314TK/02 Fix ACL "control" statement not being available in MIME ACL.
1a46a8c5
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315
316TK/03 Fix ACL "regex" condition not being available in MIME ACL.
317
318PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
319 to test Sieve filters that use "vacation".
320
321PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
322 that changes the way the GnuTLS parameters are stored in the cache file.
323 The new format can be generated externally. For backward compatibility,
324 if the data in the cache doesn't make sense, Exim assumes it has read an
325 old-format file, and it generates new data and writes a new file. This
326 means that you can't go back to an older release without removing the
327 file.
328
329PH/03 A redirect router that has both "unseen" and "one_time" set does not
330 work if there are any delivery delays because "one_time" forces the
331 parent to be marked "delivered", so its unseen clone is never tried
332 again. For this reason, Exim now forbids the simultaneous setting of
333 these two options.
334
335PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
336 redirected to themselves ("homonym" addresses). Read the long ChangeLog
337 entry if you want to know the details. The fix, however, neglected to
338 consider the case when local delivery batching is involved. The test for
339 "previously delivered" was not happening when checking to see if an
340 address could be batched with a previous (undelivered) one; under
341 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 342 address.
1a46a8c5
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343
344PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
345 in its include files, and this causes problems building Exim.
346
347PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
348 header_syntax) but Exim was just ignoring anything given after a slash.
349 In particular, this caused confusion with an attempt to use "verify =
350 reverse_host_lookup/defer_ok". An error is now given when options are
351 supplied for verify items that do not have them. (Maybe reverse_host_
352 lookup should have a defer_ok option, but that's a different point.)
353
354PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
355 defined by RFC 821) to 2048, because there were problems with some AUTH
356 commands, and RFC 1869 says the size should be increased for extended
357 SMTP commands that take arguments.
358
359PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
360 Finch).
361
362PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
363 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 364
49c2d5ea
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365PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
366 an address' error message when a string expansion fails (syntax or
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367 whatever). Otherwise the password may appear in the log. Following change
368 PH/42 below, there is no longer a chance of it appearing in a bounce
369 message.
49c2d5ea 370
bf759a8b
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371PH/11 Installed exipick version 20050225.0 from John Jetmore.
372
83364d30
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373PH/12 If the last host in a fallback_hosts list was multihomed, only the first
374 of its addresses was ever tried. (Bugzilla bug #2.)
375
7999bbd7
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376PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
377 the result incorrectly in the debug output. (It correctly added a newline
378 to what was transported.)
379
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380TF/01 Added $received_time.
381
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382PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
383 commented out examples of how to interface to a virus scanner and to
384 SpamAssassin. Also added commented examples of av_scanner and
385 spamd_address settings.
386
2f079f46
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387PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
388 and controls are allowed in which ACLs. There were a couple of minor
389 errors. Some of the entries in the conditions table (which is a table of
390 where they are NOT allowed) were getting very unwieldy; rewrote them as a
391 negation of where the condition IS allowed.
392
8c841523
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393PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
394
7766a4f0
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395PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
396 header file does not have a version number, so I've had to invent a new
397 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
398 API. The code is untested by me (my Linux distribution still has 0.3.2 of
399 radiusclient), but it was contributed by a Radius user.
400
8b417f2c
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401PH/18 Installed Lars Mainka's patch for the support of CRL collections in
402 files or directories, for OpenSSL.
403
901f42cb
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404PH/19 When an Exim process that is running as root has to create an Exim log
405 file, it does so in a subprocess that runs as exim:exim so as to get the
406 ownership right at creation (otherwise, other Exim processes might see
407 the file with the wrong ownership). There was no test for failure of this
408 fork() call, which would lead to the process getting stuck as it waited
409 for a non-existent subprocess. Forks do occasionally fail when resources
410 run out. I reviewed all the other calls to fork(); they all seem to check
411 for failure.
412
f9b9210e
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413PH/20 When checking for unexpected SMTP input at connect time (before writing
414 the banner), Exim was not dealing correctly with a non-positive return
415 from the read() function. If the client had disconnected by this time,
416 the result was a log entry for a synchronization error with an empty
417 string after "input=" when read() returned zero. If read() returned -1
418 (an event I could not check), uninitialized data bytes were printed.
419 There were reports of junk text (parts of files, etc) appearing after
420 "input=".
421
54cdb463
PH
422PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
423
cf00dad6
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424PH/22 Added support for macro redefinition, and (re)definition in between
425 driver and ACL definitions.
426
acb1b346
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427PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
428 forgetting to use the resulting value; it was using the unexpanded value.
429
c5ddb310
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430PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
431 hadn't been configured. The fix is from Juergen Kreileder, who
432 understands it better than I do:
433
434 "Here's what I see happening with three configured cyrus_sasl
435 authenticators configured (plain, login, cram-md5):
436
437 On startup auth_cyrus_sasl_init() gets called for each of these.
438 This means three calls to sasl_listmech() without a specified mech_list.
439 => SASL tests which mechs of all available mechs actually work
440 => three warnings about OTP not working
441 => the returned list contains: plain, login, cram-md5, digest-md5, ...
442
443 With the patch, sasl_listmech() also gets called three times. But now
444 SASL's mech_list option is set to the server_mech specified in the the
445 authenticator. Or in other words, the answer from sasl_listmech()
446 gets limited to just the mech you're testing for (which is different
447 for each call.)
448 => the return list contains just 'plain' or 'login', 'cram-md5' or
449 nothing depending on the value of ob->server_mech.
450
451 I've just tested the patch: Authentication still works fine,
452 unavailable mechs specified in the exim configuration are still
453 caught, and the auth.log warnings about OTP are gone."
454
31619da6
PH
455PH/25 When debugging is enabled, the contents of the command line are added
456 to the debugging output, even when log_selector=+arguments is not
457 specified.
458
bebaf0fc
PH
459PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
460 answer is "GNU", and only if the return is "GNU/something" is the answer
461 "Linux".
462
475fe28a
PH
463PH/27 $acl_verify_message is now set immediately after the failure of a
464 verification in an ACL, and so is available in subsequent modifiers. In
465 particular, the message can be preserved by coding like this:
466
467 warn !verify = sender
468 set acl_m0 = $acl_verify_message
469
470 Previously, $acl_verify_message was set only while expanding "message"
471 and "log_message" when a very denied access.
472
7e8bec7a
PH
473PH/28 Modified OS/os.c-Linux with
474
475 -#ifndef OS_LOAD_AVERAGE
476 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
477
478 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
479 nomenclature these days.)
480
e4a89c47
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481PH/29 Installed patch from the Sieve maintainer that adds the options
482 sieve_useraddress and sieve_subaddress to the redirect router.
483
5ca2a9a1
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484PH/30 In these circumstances:
485 . Two addresses routed to the same list of hosts;
486 . First host does not offer TLS;
487 . First host accepts first address;
488 . First host gives temporary error to second address;
489 . Second host offers TLS and a TLS session is established;
490 . Second host accepts second address.
491 Exim incorrectly logged both deliveries with the TLS parameters (cipher
492 and peerdn, if requested) that were in fact used only for the second
493 address.
7e8bec7a 494
c688b954
PH
495PH/31 When doing a callout as part of verifying an address, Exim was not paying
496 attention to any local part prefix or suffix that was matched by the
497 router that accepted the address. It now behaves in the same way as it
498 does for delivery: the affixes are removed from the local part unless
499 rcpt_include_affixes is set on the transport.
500
fed77020
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501PH/32 Add the sender address, as F=<...>, to the log line when logging a
502 timeout during the DATA phase of an incoming message.
503
7fe1560f
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504PH/33 Sieve envelope tests were broken for match types other than :is. I have
505 applied a patch sanctioned by the Sieve maintainer.
c688b954 506
ebb6e6d5
PH
507PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
508 the uid or gid is negative. A case of a negative gid caused this to be
509 noticed. The fix allows for either to be negative.
510
9c4e8f60
PH
511PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
512 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
513 overlooked.
514
515PH/36 The change PH/12 above was broken. Fixed it.
516
d7174846
PH
517PH/37 Exim used to check for duplicate addresses in the middle of routing, on
518 the grounds that routing the same address twice would always produce the
519 same answer. This might have been true once, but it is certainly no
520 longer true now. Routing a child address may depend on the previous
521 routing that produced that child. Some complicated redirection strategies
522 went wrong when messages had multiple recipients, and made Exim's
523 behaviour dependent on the order in which the addresses were given.
524
525 I have moved the duplicate checking until after the routing is complete.
526 Exim scans the addresses that are assigned to local and remote
527 transports, and removes any duplicates. This means that more work will be
528 done, as duplicates will always all be routed, but duplicates are
529 presumably rare, so I don't expect this is of any significance.
530
531 For deliveries to pipes, files, and autoreplies, the duplicate checking
532 still happens during the routing process, since they are not going to be
533 routed further.
534
cfe75fc3
PH
535PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
536 It corrects a timeout issue with spamd. This is Ian's comment: "The
537 background is that sometimes spamd either never reads data from a
538 connection it has accepted, or it never writes response data. The exiscan
539 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
540 blindly assumes that writes won't block so it may never time out."
541
be22d70e
PH
542PH/39 Allow G after quota size as well as K and M.
543
0612b098
PH
544PH/40 The value set for $authenticated_id in an authenticator may not contain
545 binary zeroes or newlines because the value is written to log lines and
546 to spool files. There was no check on this. Now the value is run through
547 the string_printing() function so that such characters are converted to
548 printable escape sequences.
549
2e0c1448
PH
550PH/41 $message_linecount is a new variable that contains the total number of
551 lines in the message. Compare $body_linecount, which is the count for the
552 body only.
553
447d236c
PH
554PH/42 Exim no longer gives details of delivery errors for specific addresses in
555 bounce and delay warning messages, except in certain special cases, which
556 are as follows:
557
558 (a) An SMTP error message from a remote host;
559 (b) A message specified in a :fail: redirection;
560 (c) A message specified in a "fail" command in a system filter;
561 (d) A message specified in a FAIL return from the queryprogram router;
562 (e) A message specified by the cannot_route_message router option.
563
564 In these cases only, Exim does include the error details in bounce and
565 warning messages. There are also a few cases where bland messages such
566 as "unrouteable address" or "local delivery error" are given.
567
d20976dc
PH
568PH/43 $value is now also set for the "else" part of a ${run expansion.
569
f656d135
PH
570PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
571 being worked on, but at least Exim now implements the latest version to
572 play with."
573
2e2a30b4
PH
574PH/45 In a pipe transport, although a timeout while waiting for the pipe
575 process to complete was treated as a delivery failure, a timeout while
576 writing the message to the pipe was logged, but erroneously treated as a
577 successful delivery. Such timeouts include transport filter timeouts. For
578 consistency with the overall process timeout, these timeouts are now
579 treated as errors, giving rise to delivery failures by default. However,
580 there is now a new Boolean option for the pipe transport called
581 timeout_defer, which, if set TRUE, converts the failures into defers for
582 both kinds of timeout. A transport filter timeout is now identified in
583 the log output.
584
9176e9f0
PH
585PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
586 systems where "make" and "gmake" are different, calling "gmake" at top
587 level broke things. I've arranged for the value of $(MAKE) to be passed
588 from the Makefile to this script so that it can call the same version of
589 "make".
590
7982096b 591
bbe902f0
PH
592A note about Exim versions 4.44 and 4.50
593----------------------------------------
594
595Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
596changes of various kinds. As a consequence, a big documentation update was
597needed. This delayed the release for rather longer than seemed good, especially
598in the light of a couple of (minor) security issues. Therefore, the changes
599that fixed bugs were backported into 4.43, to create a 4.44 maintenance
600release. So 4.44 and 4.50 are in effect two different branches that both start
601from 4.43.
602
603I have left the 4.50 change log unchanged; it contains all the changes since
6044.43. The change log for 4.44 is below; many of its items are identical to
605those for 4.50. This seems to be the most sensible way to preserve the
606historical information.
607
608
f7b63901 609Exim version 4.50
495ae4b0
PH
610-----------------
611
5fe762f6
PH
612 1. Minor wording change to the doc/README.SIEVE file.
613
139059f6 614 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 615 computation of the current number of files was incorrect.
495ae4b0 616
7086e875
PH
617 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
618 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
619 place.
620
35af9f61
PH
621 4. Give more explanation in the error message when the command for a transport
622 filter fails to execute.
623
b668c215
PH
624 5. There are several places where Exim runs a non-Exim command in a
625 subprocess. The SIGUSR1 signal should be disabled for these processes. This
626 was being done only for the command run by the queryprogram router. It is
627 now done for all such subprocesses. The other cases are: ${run, transport
628 filters, and the commands run by the lmtp and pipe transports.
629
a494b1e1
PH
630 6. Added CONFIGURE_GROUP build-time option.
631
632 7. Some older OS have a limit of 256 on the maximum number of file
633 descriptors. Exim was using setrlimit() to set 1000 as a large value
634 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
635 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 636
c5fcb476
PH
637 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
638 was an oversight, and furthermore, ever since the addition of extra
639 controls (e.g. 4.43/32), the checks on when to allow different forms of
640 "control" were broken. There should now be diagnostics for all cases when a
641 control that does not make sense is encountered.
642
69358f02
PH
643 9. Added the /retain_sender option to "control=submission".
644
5be20824
PH
64510. $recipients is now available in the predata ACL (oversight).
646
eb2c0248
PH
64711. Tidy the search cache before the fork to do a delivery from a message
648 received from the command line. Otherwise the child will trigger a lookup
649 failure and thereby defer the delivery if it tries to use (for example) a
650 cached ldap connection that the parent has called unbind on.
651
2a3eea10
PH
65212. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
653 of $address_data from the recipient verification was clobbered by the
654 sender verification.
655
65613. The value of address_data from a sender verification is now available in
657 $sender_address_data in subsequent conditions in the ACL statement.
658
23c7ff99
PH
65914. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
660
4deaf07d
PH
66115. Added a new option "connect=<time>" to callout options, to set a different
662 connection timeout.
663
926e1192
PH
66416. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
665 was its contents. (It was OK if the option was not defined at all.)
666
650edc6f
PH
66717. A "Completed" log line is now written for messages that are removed from
668 the spool by the -Mrm option.
669
2c7db3f5
PH
67018. New variables $sender_verify_failure and $recipient_verify_failure contain
671 information about exactly what failed.
672
3d235903
PH
67319. Added -dd to debug only the daemon process.
674
7c7ad977
PH
67520. Incorporated Michael Haardt's patch to ldap.c for improving the way it
676 handles timeouts, both on the server side and network timeouts. Renamed the
677 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
678
981756db
PH
67921. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
680 It is now set to "smtps".
681
d4eb88df
PH
68222. $host_address is now set to the target address during the checking of
683 ignore_target_hosts.
684
68523. When checking ignore_target_hosts for an ipliteral router, no host name was
686 being passed; this would have caused $sender_host_name to have been used if
687 matching the list had actually called for a host name (not very likely,
688 since this list is usually IP addresses). A host name is now passed as
689 "[x.x.x.x]".
690
7d468ab8
PH
69124. Changed the calls that set up the SIGCHLD handler in the daemon to use the
692 code that specifies a non-restarting handler (typically sigaction() in
693 modern systems) in an attempt to fix a rare and obscure crash bug.
694
69525. Narrowed the window for a race in the daemon that could cause it to ignore
696 SIGCHLD signals. This is not a major problem, because they are used only to
697 wake it up if nothing else does.
698
62c0818f
PH
69926. A malformed maildirsize file could cause Exim to calculate negative values
700 for the mailbox size or file count. Odd effects could occur as a result.
701 The maildirsize information is now recalculated if the size or filecount
702 end up negative.
703
26034054
PH
70427. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
705 support for a long time. Removed HAVE_SYS_VFS_H.
706
af66f652
PH
70728. Installed the latest version of exipick from John Jetmore.
708
90af77f4
PH
70929. In an address list, if the pattern was not a regular expression, an empty
710 subject address (from a bounce message) matched only if the pattern was an
711 empty string. Non-empty patterns were not even tested. This was the wrong
712 because it is perfectly reasonable to use an empty address as part of a
713 database query. An empty address is now tested by patterns that are
714 lookups. However, all the other forms of pattern expect the subject to
715 contain a local part and a domain, and therefore, for them, an empty
716 address still always fails if the pattern is not itself empty.
717
d8ef3577
PH
71830. Exim went into a mad DNS loop when attempting to do a callout where the
719 host was specified on an smtp transport, and looking it up yielded more
720 than one IP address.
721
5cb8cbc6
PH
72231. Re-factored the code for checking spool and log partition space into a
723 function that finds that data and another that does the check. The former
724 is then used to implement four new variables: $spool_space, $log_space,
725 $spool_inodes, and $log_inodes.
726
14702f5b
PH
72732. The RFC2047 encoding function was originally intended for short strings
728 such as real names; it was not keeping to the 75-character limit for
729 encoded words that the RFC imposes. It now respects the limit, and
730 generates multiple encoded words if necessary. To be on the safe side, I
731 have increased the buffer size for the ${rfc2047: expansion operator from
732 1024 to 2048 bytes.
733
063b1e99
PH
73433. It is now permitted to omit both strings after an "if" condition; if the
735 condition is true, the result is "true". As before, when the second string
736 is omitted, a false condition yields an empty string. This makes it less
737 cumbersome to write custom ACL and router conditions.
738
652e1b65
PH
73934. Failure to deliver a bounce message always caused it to be frozen, even if
740 there was an errors_to setting on the router. The errors_to setting is now
741 respected.
742
6f0c9a4f
PH
74335. If an IPv6 address is given for -bh or -bhc, it is now converted to the
744 canonical form (fully expanded) before being placed in
745 $sender_host_address.
746
33397d19
PH
74736. The table in the code that translates DNS record types into text (T_A to
748 "A" for instance) was missing entries for NS and CNAME. It is just possible
749 that this could have caused confusion if both these types were looked up
750 for the same domain, because the text type is used as part of Exim's
751 per-process caching. But the chance of anyone hitting this buglet seems
752 very small.
753
7bb56e1f
PH
75437. The dnsdb lookup has been extended in a number of ways.
755
756 (1) There is a new type, "zns", which walks up the domain tree until it
757 finds some nameserver records. It should be used with care.
758
ea3bc19b
PH
759 (2) There is a new type, "mxh", which is like "mx" except that it returns
760 just the host names, not the priorities.
761
762 (3) It is now possible to give a list of domains (or IP addresses) to be
ff4dbb19
PH
763 looked up. The behaviour when one of the lookups defers can be
764 controlled by a keyword.
7bb56e1f 765
ea3bc19b 766 (4) It is now possible to specify the separator character for use when
7bb56e1f 767 multiple records are returned.
33397d19 768
0bcb2a0e
PH
76938. The dnslists ACL condition has been extended: it is now possible to supply
770 a list of IP addresses and/or domains to be looked up in a particular DNS
771 domain.
772
2ac0e484
PH
77339. Added log_selector=+queue_time_overall.
774
4e1fde53
PH
77540. When running the queue in the test harness, wait just a tad after forking a
776 delivery process, to get repeatability of debugging output.
777
de365ded
PH
77841. Include certificate and key file names in error message when GnuTLS fails
779 to set them up, because the GnuTLS error message doesn't include the name
780 of the failing file when there is a problem reading it.
781
f05da2e8
PH
78242. Allow both -bf and -bF in the same test run.
783
d6453af2
PH
78443. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
785
f7b63901
PH
78644. The "Exiscan patch" is now merged into the mainline Exim source.
787
78845. Sometimes the final signoff response after QUIT could fail to get
789 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
790 < 0 before doing a fflush(). This bug looks as though it goes back to the
791 introduction of TLS in release 3.20, but "sometimes" must have been rare
792 because the tests only now provoked it.
793
a444213a
PH
79446. Reset the locale to "C" after calling embedded Perl, in case it was changed
795 (this can affect the format of dates).
796
0ec020ea
PH
79747. exim_tidydb, when checking for the continued existence of a message for
798 which it has found a message-specific retry record, was not finding
799 messages that were in split spool directories. Consequently, it was
800 deleting retry records that should have stayed in existence.
801
b1206957
PH
80248. Steve fixed some bugs in eximstats.
803
80449. The SPA authentication driver was not abandoning authentication and moving
805 on to the next authenticator when an expansion was forced to fail,
806 contradicting the general specification for all authenticators. Instead it
807 was generating a temporary error. It now behaves as specified.
808
26dd5a95
PH
80950. The default ordering of permitted cipher suites for GnuTLS was pessimal
810 (the order specifies the preference for clients). The order is now AES256,
811 AES128, 3DES, ARCFOUR128.
812
343b2385
PH
81351. Small patch to Sieve code - explicitly set From: when generating an
814 autoreply.
815
1c5466b9
PH
81652. Exim crashed if a remote delivery caused a very long error message to be
817 recorded - for instance if somebody sent an entire SpamAssassin report back
818 as a large number of 550 error lines. This bug was coincidentally fixed by
819 increasing the size of one of Exim's internal buffers (big_buffer) that
820 happened as part of the Exiscan merge. However, to be on the safe side, I
821 have made the code more robust (and fixed the comments that describe what
822 is going on).
823
55ee9ee3
PH
82453. Now that there can be additional text after "Completed" in log lines (if
825 the queue_time_overall log selector is set), a one-byte patch to exigrep
826 was needed to allow it to recognize "Completed" as not the last thing in
827 the line.
828
d38f8232
PH
82954. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
830 patch that reportedly fixes this has been added. I am not expert enough to
831 create a test for it. This is what the patch creator wrote:
832
833 "I found a little strange behaviour of ldap code when working with
834 Windows 2003 AD Domain, where users was placed in more than one
835 Organization Units. When I tried to give exim partial DN, the exit code
836 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
837 But simultaneously result of request was absolutely normal ldap result,
838 so I produce this patch..."
839
3295e65b
PH
840 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
841 REFERENCE, so I have modified the code to exclude the patch when that macro
842 is not defined.
843
7102e136
PH
84455. Some experimental protocols are using DNS PTR records for new purposes. The
845 keys for these records are domain names, not reversed IP addresses. The
b975ba52
PH
846 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
847 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 848 CAN-2005-0021
7102e136 849
3ca0ba97
PH
85056. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
851
c2bcbe20
PH
85257. Double the size of the debug message buffer (to 2048) so that more of very
853 long debug lines gets shown.
854
18ce445d
PH
85558. The exicyclog utility now does better if the number of log files to keep
856 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
857
1f5b4c3d
PH
85859. Two changes related to the smtp_active_hostname option:
859
860 (1) $smtp_active_hostname is now available as a variable.
861 (2) The default for smtp_banner uses $smtp_active_hostname instead
862 of $primary_hostname.
863
b975ba52
PH
86460. The host_aton() function is supposed to be passed a string that is known
865 to be a valid IP address. However, in the case of IPv6 addresses, it was
866 not checking this. This is a hostage to fortune. Exim now panics and dies
867 if the condition is not met. A case was found where this could be provoked
85b87bc2
PH
868 from a dnsdb PTR lookup with an IPv6 address that had more than 8
869 components; fortuitously, this particular loophole had already been fixed
870 by change 4.50/55 above.
871
872 If there are any other similar loopholes, the new check in host_aton()
873 itself should stop them being exploited. The report I received stated that
874 data on the command line could provoke the exploit when Exim was running as
875 exim, but did not say which command line option was involved. All I could
876 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
877 running as the user.
ea3a6f44 878 CAN-2005-0021
85b87bc2
PH
879
88061. There was a buffer overflow vulnerability in the SPA authentication code
881 (which came originally from the Samba project). I have added a test to the
882 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 883 CAN-2005-0022
b975ba52 884
17ffcae7
PH
88562. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
886 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
887
d95f9fdb
PH
88863. The daemon start-up calls getloadavg() while still root for those OS that
889 need the first call to be done as root, but it missed one case: when
890 deliver_queue_load_max is set with deliver_drop_privilege. This is
891 necessary for the benefit of the queue runner, because there is no re-exec
892 when deliver_drop_privilege is set.
893
86b8287f
PH
89464. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
895 This has been fixed.
896
60dc5e56
PH
89765. Caching of lookup data for "hosts =" ACL conditions, when a named host list
898 was in use, was not putting the data itself into the right store pool;
899 consequently, it could be overwritten for a subsequent message in the same
900 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
901 the caching.)
902
533244af
PH
90366. Added hosts_max_try_hardlimit to the smtp transport, default 50.
904
a5a28604
PH
90567. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
906 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
907 the function were treating the return as a boolean value, which happened to
908 work because 0=false and not-0=true, but is not correct code.
909
7e634d24
PH
91068. The host_aton() function was not handling scoped IPv6 addresses (those
911 with, for example, "%eth0" on the end) correctly.
912
3e11c26b
PH
91369. Fixed some compiler warnings in acl.c for the bitmaps specified with
914 negated items (that is, ~something) in unsigned ints. Some compilers
915 apparently mutter when there is no cast.
916
6729cf78
PH
91770. If an address verification called from an ACL failed, and did not produce a
918 user-specific message (i.e. there was only a "system" message), nothing was
919 put in $acl_verify_message. In this situation, it now puts the system
920 message there.
921
00f00ca5
PH
92271. Change 4.23/11 added synchronization checking at the start of an SMTP
923 session; change 4.31/43 added the unwanted input to the log line - except
924 that it did not do this in the start of session case. It now does.
925
c9bdd01c
PH
92672. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
927 This is wrong and can cause the other end to generate a synchronization
928 error if it is another Exim or anything else that does the synchronization
929 check. A QUIT command is no longer sent after a timeout.
930
d43194df
PH
93173. $host_lookup_deferred has been added, to make it easier to detect DEFERs
932 during host lookups.
933
fe5b5d0b
PH
93474. The defer_ok option of callout verification was not working if it was used
935 when verifying addresses in header lines, that is, for this case:
936
937 verify = header_sender/callout=defer_ok
938
76a2d7ba
PH
93975. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
940 those file descriptors could be used for SMTP connections. If anything
941 wrote to stderr (the example that came up was "warn" in embedded Perl), it
942 could be sent to the SMTP client, causing chaos. The daemon now opens
943 stdin, stdout, and stderr to /dev/null when it puts itself into the
944 background.
945
94676. Arrange for output from Perl's "warn" command to be written to Exim's main
947 log by default. The user can override this with suitable Perl magic.
948
04f7d5b9
PH
94977. The use of log_message on a "discard" ACL verb, which is supposed to add to
950 the log message when discard triggers, was not working for the DATA ACL or
951 for the non-SMTP ACL.
952
bc60667e
PH
95378. Error message wording change in sieve.c.
954
bb6e88ff
PH
95579. If smtp_accept_max_per_host was set, the number of connections could be
956 restricted to fewer than expected, because the daemon was trying to set up
957 a new connection before checking whether the processes handling previous
958 connections had finished. The check for completed processes is now done
959 earlier. On busy systems, this bug wouldn't be noticed because something
960 else would have woken the daemon, and it would have reaped the completed
961 process earlier.
962
1e70f85b
PH
96380. If a message was submitted locally by a user whose login name contained one
964 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
965 It caused a spool format error. I have fixed the spool reading code. A
966 related problem was that the "from" clause in the Received: line became
967 illegal because of the space(s). It is now covered by ${quote_local_part.
968
96981. Included the latest eximstats from Steve (adds average sizes to HTML Top
970 tables).
971
4e01f9d6
PH
97282. Updated OS/Makefile-AIX as per message from Mike Meredith.
973
1ee1cef2
PH
97483. Patch from Sieve maintainer to fix unterminated string problem in
975 "vacation" handling.
976
6e2b4ccc
PH
97784. Some minor changes to the Linux configuration files to help with other
978 OS variants using glibc.
979
8e669ac1
PH
98085. One more patch for Sieve to update vacation handling to latest spec.
981
495ae4b0 982
bbe902f0
PH
983----------------------------------------------------
984See the note above about the 4.44 and 4.50 releases.
985----------------------------------------------------
986
987
988Exim version 4.44
989-----------------
990
991 1. Change 4.43/35 introduced a bug that caused file counts to be
992 incorrectly computed when quota_filecount was set in an appendfile
993 transport
994
995 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
996 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
997 place.
998
999 3. Give more explanation in the error message when the command for a transport
1000 filter fails to execute.
1001
1002 4. There are several places where Exim runs a non-Exim command in a
1003 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1004 was being done only for the command run by the queryprogram router. It is
1005 now done for all such subprocesses. The other cases are: ${run, transport
1006 filters, and the commands run by the lmtp and pipe transports.
1007
1008 5. Some older OS have a limit of 256 on the maximum number of file
1009 descriptors. Exim was using setrlimit() to set 1000 as a large value
1010 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1011 systems. I've change it so that if it can't get 1000, it tries for 256.
1012
1013 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1014 was an oversight, and furthermore, ever since the addition of extra
1015 controls (e.g. 4.43/32), the checks on when to allow different forms of
1016 "control" were broken. There should now be diagnostics for all cases when a
1017 control that does not make sense is encountered.
1018
1019 7. $recipients is now available in the predata ACL (oversight).
1020
1021 8. Tidy the search cache before the fork to do a delivery from a message
1022 received from the command line. Otherwise the child will trigger a lookup
1023 failure and thereby defer the delivery if it tries to use (for example) a
1024 cached ldap connection that the parent has called unbind on.
1025
1026 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1027 of $address_data from the recipient verification was clobbered by the
1028 sender verification.
1029
103010. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1031 was its contents. (It was OK if the option was not defined at all.)
1032
103311. A "Completed" log line is now written for messages that are removed from
1034 the spool by the -Mrm option.
1035
103612. $host_address is now set to the target address during the checking of
1037 ignore_target_hosts.
1038
103913. When checking ignore_target_hosts for an ipliteral router, no host name was
1040 being passed; this would have caused $sender_host_name to have been used if
1041 matching the list had actually called for a host name (not very likely,
1042 since this list is usually IP addresses). A host name is now passed as
1043 "[x.x.x.x]".
1044
104514. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1046 code that specifies a non-restarting handler (typically sigaction() in
1047 modern systems) in an attempt to fix a rare and obscure crash bug.
1048
104915. Narrowed the window for a race in the daemon that could cause it to ignore
1050 SIGCHLD signals. This is not a major problem, because they are used only to
1051 wake it up if nothing else does.
1052
105316. A malformed maildirsize file could cause Exim to calculate negative values
1054 for the mailbox size or file count. Odd effects could occur as a result.
1055 The maildirsize information is now recalculated if the size or filecount
1056 end up negative.
1057
105817. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1059 support for a long time. Removed HAVE_SYS_VFS_H.
1060
ea3a6f44 106118. Updated exipick to current release from John Jetmore.
bbe902f0
PH
1062
106319. Allow an empty sender to be matched against a lookup in an address list.
1064 Previously the only cases considered were a regular expression, or an
1065 empty pattern.
1066
106720. Exim went into a mad DNS lookup loop when doing a callout where the
1068 host was specified on the transport, if the DNS lookup yielded more than
1069 one IP address.
1070
ea3a6f44
NM
107121. The RFC2047 encoding function was originally intended for short strings
1072 such as real names; it was not keeping to the 75-character limit for
1073 encoded words that the RFC imposes. It now respects the limit, and
1074 generates multiple encoded words if necessary. To be on the safe side, I
1075 have increased the buffer size for the ${rfc2047: expansion operator from
1076 1024 to 2048 bytes.
bbe902f0 1077
ea3a6f44
NM
107822. Failure to deliver a bounce message always caused it to be frozen, even if
1079 there was an errors_to setting on the router. The errors_to setting is now
1080 respected.
bbe902f0
PH
1081
108223. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1083 canonical form (fully expanded) before being placed in
1084 $sender_host_address.
1085
108624. Updated eximstats to version 1.33
1087
ea3a6f44
NM
108825. Include certificate and key file names in error message when GnuTLS fails
1089 to set them up, because the GnuTLS error message doesn't include the name
1090 of the failing file when there is a problem reading it.
bbe902f0
PH
1091
109226. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1093 As per change 25.
bbe902f0 1094
ea3a6f44
NM
109527. Reset the locale to "C" after calling embedded Perl, in case it was changed
1096 (this can affect the format of dates).
bbe902f0 1097
ea3a6f44
NM
109828. exim_tidydb, when checking for the continued existence of a message for
1099 which it has found a message-specific retry record, was not finding
1100 messages that were in split spool directories. Consequently, it was
1101 deleting retry records that should have stayed in existence.
bbe902f0
PH
1102
110329. eximstats updated to version 1.35
1104 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1105 1.35 - bugfix such that pie charts by volume are generated correctly
1106
ea3a6f44
NM
110730. The SPA authentication driver was not abandoning authentication and moving
1108 on to the next authenticator when an expansion was forced to fail,
1109 contradicting the general specification for all authenticators. Instead it
1110 was generating a temporary error. It now behaves as specified.
bbe902f0 1111
ea3a6f44
NM
111231. The default ordering of permitted cipher suites for GnuTLS was pessimal
1113 (the order specifies the preference for clients). The order is now AES256,
1114 AES128, 3DES, ARCFOUR128.
bbe902f0 1115
ea3a6f44
NM
111631. Small patch to Sieve code - explicitly set From: when generating an
1117 autoreply.
bbe902f0 1118
ea3a6f44
NM
111932. Exim crashed if a remote delivery caused a very long error message to be
1120 recorded - for instance if somebody sent an entire SpamAssassin report back
1121 as a large number of 550 error lines. This bug was coincidentally fixed by
1122 increasing the size of one of Exim's internal buffers (big_buffer) that
1123 happened as part of the Exiscan merge. However, to be on the safe side, I
1124 have made the code more robust (and fixed the comments that describe what
1125 is going on).
bbe902f0 1126
ea3a6f44
NM
112733. Some experimental protocols are using DNS PTR records for new purposes. The
1128 keys for these records are domain names, not reversed IP addresses. The
1129 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1130 leaves it alone. Component reversal etc. now happens only for IP addresses.
bbe902f0
PH
1131 CAN-2005-0021
1132
ea3a6f44
NM
113334. The host_aton() function is supposed to be passed a string that is known
1134 to be a valid IP address. However, in the case of IPv6 addresses, it was
1135 not checking this. This is a hostage to fortune. Exim now panics and dies
1136 if the condition is not met. A case was found where this could be provoked
1137 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1138 components; fortuitously, this particular loophole had already been fixed
1139 by change 4.50/55 or 4.44/33 above.
1140
1141 If there are any other similar loopholes, the new check in host_aton()
1142 itself should stop them being exploited. The report I received stated that
1143 data on the command line could provoke the exploit when Exim was running as
1144 exim, but did not say which command line option was involved. All I could
1145 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1146 running as the user.
bbe902f0
PH
1147 CAN-2005-0021
1148
ea3a6f44
NM
114935. There was a buffer overflow vulnerability in the SPA authentication code
1150 (which came originally from the Samba project). I have added a test to the
1151 spa_base64_to_bits() function which I hope fixes it.
bbe902f0
PH
1152 CAN-2005-0022
1153
ea3a6f44
NM
115436. The daemon start-up calls getloadavg() while still root for those OS that
1155 need the first call to be done as root, but it missed one case: when
1156 deliver_queue_load_max is set with deliver_drop_privilege. This is
1157 necessary for the benefit of the queue runner, because there is no re-exec
1158 when deliver_drop_privilege is set.
bbe902f0 1159
ea3a6f44
NM
116037. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1161 was in use, was not putting the data itself into the right store pool;
1162 consequently, it could be overwritten for a subsequent message in the same
1163 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1164 the caching.)
bbe902f0 1165
ea3a6f44
NM
116638. Sometimes the final signoff response after QUIT could fail to get
1167 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1168 < 0 before doing a fflush(). This bug looks as though it goes back to the
1169 introduction of TLS in release 3.20, but "sometimes" must have been rare
1170 because the tests only now provoked it.
bbe902f0
PH
1171
1172
495ae4b0
PH
1173Exim version 4.43
1174-----------------
1175
1176 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1177 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1178 Now it returns an integer. A number of calls were still expecting a T/F
1179 return. Fortuitously, in all cases, the tests worked in OK situations,
1180 which is the norm. However, things would have gone wrong on any write
1181 failures on the smtp file descriptor. This function is used when sending
1182 messages over SMTP and also when doing verify callouts.
1183
1184 2. When Exim is called to do synchronous delivery of a locally submitted
1185 message (the -odf or -odi options), it no longer closes stderr before doing
1186 the delivery.
1187
1188 3. Implemented the mua_wrapper option.
1189
1190 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1191
1192 5. Implemented the functions header_remove(), header_testname(),
1193 header_add_at_position(), and receive_remove_recipient(), and exported them
1194 to local_scan().
1195
1196 6. If an ACL "warn" statement specified the addition of headers, Exim already
1197 inserted X-ACL-Warn: at the start if there was no header name. However, it
1198 was not making this test for the second and subsequent header lines if
1199 there were newlines in the string. This meant that an invalid header could
1200 be inserted if Exim was badly configured.
1201
1202 7. Allow an ACL "warn" statement to add header lines at the start or after all
1203 the Received: headers, as well as at the end.
1204
1205 8. Added the rcpt_4xx retry error code.
1206
1207 9. Added postmaster_mailfrom=xxx to callout verification option.
1208
120910. Added mailfrom=xxxx to the callout verification option, for verify=
1210 header_sender only.
1211
121211. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1213 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1214
121512. Inserted some casts to stop certain compilers warning when using pointer
1216 differences as field lengths or precisions in printf-type calls (mostly
1217 affecting debugging statements).
1218
121913. Added optional readline() support for -be (dynamically loaded).
1220
122114. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1222 same clock tick as a message's arrival, so that its received time was the
1223 same as the "first fail" time on the retry record, and that message
1224 remained on the queue past the ultimate address timeout, every queue runner
1225 would try a delivery (because it was past the ultimate address timeout) but
1226 after another failure, the ultimate address timeout, which should have then
1227 bounced the address, did not kick in. This was a "< instead of <=" error;
1228 in most cases the first failure would have been in the next clock tick
1229 after the received time, and all would be well.
1230
123115. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1232 being recognized when the domain list was tested by the match_domain
1233 condition in an expansion string.
1234
123516. Added the ${str2b64: operator.
1236
123717. Exim was always calling setrlimit() to set a large limit for the number of
1238 processes, without checking whether the existing limit was already
1239 adequate. (It did check for the limit on file descriptors.) Furthermore,
1240 errors from getrlimit() and setrlimit() were being ignored. Now they are
1241 logged to the main and panic logs, but Exim does carry on, to try to do its
1242 job under whatever limits there are.
1243
124418. Imported PCRE 5.0.
1245
124619. Trivial typo in log message " temporarily refused connection" (the leading
1247 space).
1248
124920. If the log selector return_path_on_delivery was set and an address was
1250 redirected to /dev/null, the delivery process crashed because it assumed
1251 that a return path would always be set for a "successful" delivery. In this
1252 case, the whole delivery is bypassed as an optimization, and therefore no
1253 return path is set.
1254
125521. Internal re-arrangement: the function for sending a challenge and reading
1256 a response while authentication was assuming a zero-terminated challenge
1257 string. It's now changed to take a pointer and a length, to allow for
1258 binary data in such strings.
1259
126022. Added the cyrus_sasl authenticator (code supplied by MBM).
1261
126223. Exim was not respecting finduser_retries when seeking the login of the
1263 uid under which it was called; it was always trying 10 times. (The default
1264 setting of finduser_retries is zero.) Also, it was sleeping after the final
1265 failure, which is pointless.
1266
126724. Implemented tls_on_connect_ports.
1268
126925. Implemented acl_smtp_predata.
1270
127126. If the domain in control=submission is set empty, Exim assumes that the
1272 authenticated id is a complete email address when it generates From: or
1273 Sender: header lines.
1274
127527. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1276 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1277 chown and chgrp in /bin and hostname in /usr/bin.
1278
127928. Exim was keeping the "process log" file open after each use, just as it
1280 does for the main log. This opens the possibility of it remaining open for
1281 long periods when the USR1 signal hits a daemon. Occasional processlog
1282 errors were reported, that could have been caused by this. Anyway, it seems
1283 much more sensible not to leave this file open at all, so that is what now
1284 happens.
1285
128629. The long-running daemon process does not normally write to the log once it
1287 has entered its main loop, and it closes the log before doing so. This is
1288 so that log files can straightforwardly be renamed and moved. However,
1289 there are a couple of unusual error situations where the daemon does write
1290 log entries, and I had neglected to close the log afterwards.
1291
129230. The text of an SMTP error response that was received during a remote
1293 delivery was being truncated at 512 bytes. This is too short for some of
1294 the long messages that one sometimes sees. I've increased the limit to
1295 1024.
1296
129731. It is now possible to make retry rules that apply only when a message has a
1298 specific sender, in particular, an empty sender.
1299
130032. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1301 it possible to be selective about when SMTP synchronization is enforced.
1302
130333. Added "control = caseful_local_part" and "control = "caselower_local_part".
1304
130532. Implemented hosts_connection_nolog.
1306
130733. Added an ACL for QUIT.
1308
130934. Setting "delay_warning=" to disable warnings was not working; it gave a
1310 syntax error.
1311
131235. Added mailbox_size and mailbox_filecount to appendfile.
1313
131436. Added control = no_multiline_responses to ACLs.
1315
131637. There was a bug in the logic of the code that waits for the clock to tick
1317 in the case where the clock went backwards by a substantial amount such
1318 that the microsecond fraction of "now" was more than the microsecond
1319 fraction of "then" (but the whole seconds number was less).
1320
132138. Added support for the libradius Radius client library this is found on
1322 FreeBSD (previously only the radiusclient library was supported).
1323
1324
1325Exim version 4.42
1326-----------------
1327
1328 1. When certain lookups returned multiple values in the form name=value, the
1329 quoting of the values was not always being done properly. Specifically:
1330 (a) If the value started with a double quote, but contained no whitespace,
1331 it was not quoted.
1332 (b) If the value contained whitespace other than a space character (i.e.
1333 tabs or newlines or carriage returns) it was not quoted.
1334 This fix has been applied to the mysql and pgsql lookups by writing a
1335 separate quoting function and calling it from the lookup code. The fix
1336 should probably also be applied to nisplus, ibase and oracle lookups, but
1337 since I cannot test any of those, I have not disturbed their existing code.
1338
1339 2. A hit in the callout cache for a specific address caused a log line with no
1340 reason for rejecting RCPT. Now it says "Previous (cached) callout
1341 verification failure".
1342
1343 3. There was an off-by-one bug in the queryprogram router. An over-long
1344 return line was truncated at 256 instead of 255 characters, thereby
1345 overflowing its buffer with the terminating zero. As well as fixing this, I
1346 have increased the buffer size to 1024 (and made a note to document this).
1347
1348 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1349 when Exim is waiting for an SMTP response from a remote server, Exim
1350 restarts its select() call on the socket, thereby resetting its timeout.
1351 This is not a problem when such interrupts are rare. Somebody set up a cron
1352 job to run exiwhat every 2 minutes, which is less than the normal select()
1353 timeout (5 or 10 minutes). This meant that the select() timeout never
1354 kicked in because it was always reset. I have fixed this by comparing the
1355 time when an interrupt arrives with the time at the start of the first call
1356 to select(). If more time than the timeout has elapsed, the interrupt is
1357 treated as a timeout.
1358
1359 5. Some internal re-factoring in preparation for the addition of Sieve
1360 extensions (by MH). In particular, the "personal" test is moved to a
1361 separate function, and given an option for scanning Cc: and Bcc: (which is
1362 not set for Exim filters).
1363
1364 6. When Exim created an email address using the login of the caller as the
1365 local part (e.g. when creating a From: or Sender: header line), it was not
1366 quoting the local part when it contained special characters such as @.
1367
1368 7. Installed new OpenBSD configuration files.
1369
1370 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1371 try to make them clearer.
1372
1373 9. Callout options, other than the timeout value, were being ignored when
1374 verifying sender addresses in header lines. For example, when using
1375
1376 verify = header_sender/callout=no_cache
1377
1378 the cache was (incorrectly) being used.
1379
138010. Added a missing instance of ${EXE} to the exim_install script; this affects
1381 only the Cygwin environment.
1382
138311. When return_path_on_delivery was set as a log selector, if different remote
1384 addresses in the same message used different return paths and parallel
1385 remote delivery occurred, the wrong values would sometimes be logged.
1386 (Whenever a remote delivery process finished, the return path value from
1387 the most recently started remote delivery process was logged.)
1388
138912. RFC 3848 specifies standard names for the "with" phrase in Received: header
1390 lines when AUTH and/or TLS are in use. This is the "received protocol"
1391 field. Exim used to use "asmtp" for authenticated SMTP, without any
1392 indication (in the protocol name) for TLS use. Now it follows the RFC and
1393 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1394 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1395 names appear in log lines as well as in Received: header lines.
1396
139713. Installed MH's patches for Sieve to add the "copy" and "vacation"
1398 extensions, and comparison tests, and to fix some bugs.
1399
140014. Changes to the "personal" filter test:
1401
1402 (1) The test was buggy in that it was just doing the equivalent of
1403 "contains" tests on header lines. For example, if a user's address was
1404 anne@some.where, the "personal" test would incorrectly be true for
1405
1406 To: susanne@some.where
1407
1408 This test is now done by extracting each address from the header in turn,
1409 and checking the entire address. Other tests that are part of "personal"
1410 are now done using regular expressions (for example, to check local parts
1411 of addresses in From: header lines).
1412
1413 (2) The list of non-personal local parts in From: addresses has been
1414 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1415 taken from the Sieve specification recommendations.
1416
1417 (3) If the message contains any header line starting with "List-" it is
1418 treated as non-personal.
1419
1420 (4) The test for "circular" in the Subject: header line has been removed
1421 because it now seems ill-conceived.
1422
142315. Minor typos in src/EDITME comments corrected.
1424
142516. Installed latest exipick from John Jetmore.
1426
142717. If headers_add on a router specified a text string that was too long for
1428 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1429 of string_sprintf() is now avoided.
1430
143118. $message_body_size was not set (it was always zero) when running the DATA
1432 ACL and the local_scan() function.
1433
143419. For the "mail" command in an Exim filter, no default was being set for
1435 the once_repeat time, causing a random time value to be used if "once" was
1436 specified. (If the value happened to be <= 0, no repeat happened.) The
1437 default is now 0s, meaning "never repeat". The "vacation" command was OK
1438 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1439 (I found it when inspecting the code).
1440
144120. There is now an overall timeout for performing a callout verification. It
1442 defaults to 4 times the callout timeout, which applies to individual SMTP
1443 commands during the callout. The overall timeout applies when there is more
1444 than one host that can be tried. The timeout is checked before trying the
1445 next host. This prevents very long delays if there are a large number of
1446 hosts and all are timing out (e.g. when the network connections are timing
1447 out). The value of the overall timeout can be changed by specifying an
1448 additional sub-option for "callout", called "maxwait". For example:
1449
1450 verify = sender/callout=5s,maxwait=20s
1451
145221. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1453 to the end before writing, but this should make it even safer).
1454
145522. Exim was forgetting that it had advertised PIPELINING for the second and
1456 subsequent messages on an SMTP connection. It was also not resetting its
1457 memory on STARTTLS and an internal HELO.
1458
145923. When Exim logs an SMTP synchronization error within a session, it now
1460 records whether PIPELINING has been advertised or not.
1461
146224. Added 3 instances of "(long int)" casts to time_t variables that were being
1463 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1464 rather than long int.
1465
146625. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1467
146826. Added the never_mail option to autoreply.
1469
1470
1471Exim version 4.41
1472-----------------
1473
1474 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1475 crash if the getsockname() call failed; this can happen if a connection is
1476 closed very soon after it is established. The problem was simply in the
1477 order in which certain operations were done, causing Exim to try to write
1478 to the SMTP stream before it had set up the file descriptor. The bug has
1479 been fixed by making things happen in the correct order.
1480
1481
1482Exim version 4.40
1483-----------------
1484
1485 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1486 before the connection was closed, thus losing the rejection response.
1487
1488 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1489 some early Solaris releases, but causes trouble in current releases where
1490 socklen_t is defined.
1491
1492 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1493 always exist.
1494
1495 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1496 configured.
1497
1498 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1499 that releasing the top of it at the end releases what was used for sub-
1500 expansions (unless the block got too big). However, discard this block if
1501 the first thing is a variable or header, so that we can use its block when
1502 it is dynamic (useful for very large $message_headers, for example).
1503
1504 6. Lookups now cache *every* query, not just the most recent. A new, separate
1505 store pool is used for this. It can be recovered when all lookup caches are
1506 flushed. Lookups now release memory at the end of their result strings.
1507 This has involved some general refactoring of the lookup sources.
1508
1509 7. Some code has been added to the store_xxx() functions to reduce the amount
1510 of flapping under certain conditions.
1511
1512 8. log_incoming_interface used to affect only the <= reception log lines. Now
1513 it causes the local interface and port to be added to several more SMTP log
1514 lines, for example "SMTP connection from", and rejection lines.
1515
1516 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
1517
151810. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
1519
152011. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1521 could be overwritten at the end of the current message (or the start of a
1522 new message if it was set in a HELO ACL). The value is now preserved for
1523 the duration of the SMTP connection.
1524
152512. If a transport had a headers_rewrite setting, and a matching header line
1526 contained an unqualified address, that address was qualified, even if it
1527 did not match any rewriting rules. The underlying bug was that the values
1528 of the flags that permit the existence of unqualified sender and recipient
1529 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1530 non-local messages, and by -bnq for local messages) were not being
1531 preserved with the message after it was received.
1532
153313. When Exim was logging an SMTP synchronization error, it could sometimes log
1534 "next input=" as part of the text comprising the host identity instead of
1535 the correct text. The code was using the same buffer for two different
1536 strings. However, depending on which order the printing function evaluated
1537 its arguments, the bug did not always show up. Under Linux, for example, my
1538 test suite worked just fine.
1539
154014. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1541 doesn't work with some older versions of Perl. It has been changed to "my",
1542 which in any case is probably the better facility to use.
1543
154415. A really picky compiler found some instances of statements for creating
1545 error messages that either had too many or two few arguments for the format
1546 string.
1547
154816. The size of the buffer for calls to the DNS resolver has been increased
1549 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1550 for addresses that have a lot of PTR records. This alleviates a problem; it
1551 does not fully solve it.
1552
155317. A dnsdb lookup for PTR records that receives more data than will fit in the
1554 buffer now truncates the list and logs the incident, which is the same
1555 action as happens when Exim is looking up a host name and its aliases.
1556 Previously in this situation something unpredictable would happen;
1557 sometimes it was "internal error: store_reset failed".
1558
155918. If a server dropped the connection unexpectedly when an Exim client was
1560 using GnuTLS and trying to read a response, the client delivery process
1561 crashed while trying to generate an error log message.
1562
156319. If a "warn" verb in an ACL added multiple headers to a message in a single
1564 string, for example:
1565
1566 warn message = H1: something\nH2: something
1567
1568 the text was added as a single header line from Exim's point of view
1569 though it ended up OK in the delivered message. However, searching for the
1570 second and subsequent header lines using $h_h2: did not work. This has been
1571 fixed. Similarly, if a system filter added multiple headers in this way,
1572 the routers could not see them.
1573
157420. Expanded the error message when iplsearch is called with an invalid key to
1575 suggest using net-iplsearch in a host list.
1576
157721. When running tests using -bh, any delays imposed by "delay" modifiers in
1578 ACLs are no longer actually imposed (and a message to that effect is
1579 output).
1580
158122. If a "gecos" field in a passwd entry contained escaped characters, in
1582 particular, if it contained a \" sequence, Exim got it wrong when building
1583 a From: or a Sender: header from that name. A second bug also caused
1584 incorrect handling when an unquoted " was present following a character
1585 that needed quoting.
1586
158723. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1588 was not being matched caselessly.
1589
159024. Arranged for all hyphens in the exim.8 source to be escaped with
1591 backslashes.
1592
159325. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1594 properly. Recipient callout cache records were still being keyed to include
1595 the sender, even when use_sender was set false. This led to far more
1596 callouts that were necessary. The sender is no longer included in the key
1597 when use_sender is false.
1598
159926. Added "control = submission" modifier to ACLs.
1600
160127. Added the ${base62d: operator to decode base 62 numbers.
1602
160328. dnsdb lookups can now access SRV records.
1604
160529. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1606 the configuration file.
1607
160830. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1609 (-v) mode. This makes the output for a verbose queue run more intelligible.
1610
161131. Added a use_postmaster feature to recipient callouts.
1612
161332. Added the $body_zerocount variable, containing the number of binary zero
1614 bytes in the message body.
1615
161633. The time of last modification of the "new" subdirectory is now used as the
1617 "mailbox time last read" when there is a quota error for a maildir
1618 delivery.
1619
162034. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
1621
162235. Added +ignore_unknown as a special item in host lists.
1623
162436. Code for decoding IPv6 addresses in host lists is now included, even if
1625 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1626 address was recognized as an IP address, but was then not correctly decoded
1627 into binary, causing unexpected and incorrect effects when compared with
1628 another IP address.
1629
1630
1631Exim version 4.34
1632-----------------
1633
1634 1. Very minor rewording of debugging text in manualroute to say "list of
1635 hosts" instead of "hostlist".
1636
1637 2. If verify=header_syntax was set, and a header line with an unqualified
1638 address (no domain) and a large number of spaces between the end of the
1639 name and the colon was received, the reception process suffered a buffer
1640 overflow, and (when I tested it) crashed. This was caused by some obsolete
1641 code that should have been removed. The fix is to remove it!
1642
1643 3. When running in the test harness, delay a bit after writing a bounce
1644 message to get a bit more predictability in the log output.
1645
1646 4. Added a call to search_tidyup() just before forking a reception process. In
1647 theory, someone could use a lookup in the expansion of smtp_accept_max_
1648 per_host which, without the tidyup, could leave open a database connection.
1649
1650 5. Added the variables $recipient_data and $sender_data which get set from a
1651 lookup success in an ACL "recipients" or "senders" condition, or a router
1652 "senders" option, similar to $domain_data and $local_part_data.
1653
1654 6. Moved the writing of debug_print from before to after the "senders" test
1655 for routers.
1656
1657 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1658 problems for message scanning, either using a data ACL, or using
1659 local_scan() because the Received: header was not generated till after they
1660 were called (in order to set the time as the time of reception completion).
1661 I have revised the way this works. The header is now generated after the
1662 body is received, but before the ACL or local_scan() are called. After they
1663 are run, the timestamp in the header is updated.
1664
1665
1666Exim version 4.33
1667-----------------
1668
1669 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1670 before starting a queue runner without re-exec. This happened only when
1671 deliver_drop_privilege was set or when the Exim user was set to root. The
1672 effect of the bug was that timeouts during subsequent deliveries caused
1673 crashes instead of being properly handled. The handler is now left at its
1674 default (and expected) setting.
1675
1676 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1677 message, again when deliver_drop_privilege is set or Exim is run as root.
1678 The bug described in (1) was not present in this case, but the tidying up
1679 of the other signals was missing. I have made the two cases consistent.
1680
1681 3. The ignore_target_hosts setting on a manualroute router was being ignored
1682 for hosts that were looked up using the /MX notation.
1683
1684 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1685 in domain lists.
1686
1687 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1688 operated on the sender address. After changing the $sender_address to <>
1689 for the sender address verify, Exim was re-instated it as the original
1690 (before rewriting) address, but remembering that it had rewritten it, so it
1691 wasn't rewriting it again. This bug also had the effect of breaking the
1692 sender address verification caching when the sender address was rewritten.
1693
1694 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1695 This has been changed so that if the ip literal address matches
1696 ignore_target_hosts, the router declines.
1697
1698 7. Added expansion conditions match_domain, match_address, and match_local_
1699 part (NOT match_host).
1700
1701 8. The placeholder for the Received: header didn't have a length field set.
1702
1703 9. Added code to Exim itself and to exim_lock to test for a specific race
1704 condition that could lead to file corruption when using MBX delivery. The
1705 issue is with the lockfile that is created in /tmp. If this file is removed
1706 after a process has opened it but before that process has acquired a lock,
1707 there is the potential for a second process to recreate the file and also
1708 acquire a lock. This could lead to two Exim processes writing to the file
1709 at the same time. The added code performs the same test as UW imapd; it
1710 checks after acquiring the lock that its file descriptor still refers to
1711 the same named file.
1712
171310. The buffer for building added header lines was of fixed size, 8192 bytes.
1714 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1715 when Exim is built.
1716
171711. Added the smtp_active_hostname option. If used, this will typically be made
1718 to depend on the incoming interface address. Because $interface_address is
1719 not set up until the daemon has forked a reception process, error responses
1720 that can happen earlier (such as "too many connections") no longer contain
1721 a host name.
1722
172312. If an expansion in a condition on a "warn" statement fails because a lookup
1724 defers, the "warn" statement is abandoned, and the next ACL statement is
1725 processed. Previously this caused the whole ACL to be aborted.
1726
172713. Added the iplsearch lookup type.
1728
172914. Added ident_timeout as a log selector.
1730
173115. Added tls_certificate_verified as a log selector.
1732
173316. Added a global option tls_require_ciphers (compare the smtp transport
1734 option of the same name). This controls incoming TLS connections.
1735
173617. I finally figured out how to make tls_require_ciphers do a similar thing
1737 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
1738 before starting the TLS session.
1739
174018. Tabs are now shown as \t in -bP output.
1741
174219. If the log selector return_path_on_delivery was set, Exim crashed when
1743 bouncing a message because it had too many Received: header lines.
1744
174520. If two routers both had headers_remove settings, and the first one included
1746 a superfluous trailing colon, the final name in the first list and the
1747 first name in the second list were incorrectly joined into one item (with a
1748 colon in the middle).
1749
1750
1751Exim version 4.32
1752-----------------
1753
1754 1. Added -C and -D options to the exinext utility, mainly to make it easier
1755 to include in the automated testing, but these could be helpful when
1756 multiple configurations are in use.
1757
1758 2. The exinext utility was not formatting the output nicely when there was
1759 an alternate port involved in the retry record key, nor when there was a
1760 message id as well (for retries that were specific to a specific message
1761 and a specific host). It was also confused by IPv6 addresses, because of
1762 the additional colons they contain. I have fixed the IPv4 problem, and
1763 patched it up to do a reasonable job for IPv6.
1764
1765 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
1766 delivery, the log line now contains "pipelined" if PIPELINING was used.
1767
1768 4. An SMTP transport process used to panic and die if the bind() call to set
1769 an explicit outgoing interface failed. This has been changed; it is now
1770 treated in the same way as a connect() failure.
1771
1772 5. A reference to $sender_host_name in the part of a conditional expansion
1773 that was being skipped was still causing a DNS lookup. This no longer
1774 occurs.
1775
1776 6. The def: expansion condition was not recognizing references to header lines
1777 that used bh_ and bheader_.
1778
1779 7. Added the _cache feature to named lists.
1780
1781 8. The code for checking quota_filecount in the appendfile transport was
1782 allowing one more file than it should have been.
1783
1784 9. For compatibility with Sendmail, the command line option
1785
1786 -prval:sval
1787
1788 is equivalent to
1789
1790 -oMr rval -oMs sval
1791
1792 and sets the incoming protocol and host name (for trusted callers). The
1793 host name and its colon can be omitted when only the protocol is to be set.
1794 Note the Exim already has two private options, -pd and -ps, that refer to
1795 embedded Perl. It is therefore impossible to set a protocol value of "d" or
1796 "s", but I don't think that's a major issue.
1797
179810. A number of refactoring changes to the code, none of which should affect
1799 Exim's behaviour:
1800
1801 (a) The number of logging options was getting close to filling up the
1802 32-bit word that was used as a bit map. I have split them into two classes:
1803 those that are passed in the argument to log_write(), and those that are
1804 only ever tested independently outside of that function. These are now in
1805 separate 32-bit words, so there is plenty of room for expansion again.
1806 There is no change in the user interface or the logging behaviour.
1807
1808 (b) When building, for example, log lines, the code previously used a
1809 macro that called string_cat() twice, in order to add two strings. This is
1810 not really sufficiently general. Furthermore, there was one instance where
1811 it was actually wrong because one of the argument was used twice, and in
1812 one call a function was used. (As it happened, calling the function twice
1813 did not affect the overall behaviour.) The macro has been replaced by a
1814 function that can join an arbitrary number of extra strings onto a growing
1815 string.
1816
1817 (c) The code for expansion conditions now uses a table and a binary chop
1818 instead of a serial search (which was left over from when there were very
1819 few conditions). Also, it now recognizes conditions like "pam" even when
1820 the relevant support is not compiled in: a suitably worded error message is
1821 given if an attempt is made to use such a condition.
1822
182311. Added ${time_interval:xxxxx}.
1824
182512. A bug was causing one of the ddress fields not to be passed back correctly
1826 from remote delivery subprocesses. The field in question was not being
1827 subsequently used, so this caused to problems in practice.
1828
182913. Added new log selectors queue_time and deliver_time.
1830
183114. Might have fixed a bug in maildirsizefile handling that threw up
1832 "unexpected character" debug warnings, and recalculated the data
1833 unnecessarily. In any case, I expanded the warning message to give more
1834 information.
1835
183615. Added the message "Restricted characters in address" to the statements in
1837 the default ACL that block characters like @ and % in local parts.
1838
183916. Change 71 for release 4.31 proved to be much less benign that I imagined.
1840 Three changes have been made:
1841
1842 (a) There was a serious bug; a negative response to MAIL caused the whole
1843 recipient domain to be cached as invalid, thereby blocking all messages
1844 to all local parts at the same domain, from all senders. This bug has
1845 been fixed. The domain is no longer cached after a negative response to
1846 MAIL if the sender used is not empty.
1847
1848 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
1849 been restored.
1850
1851 (c) A new callout option, "use_sender" has been added for people who want
1852 the modified behaviour.
1853
1854
1855Exim version 4.31
1856-----------------
1857
1858 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
1859 Larry Rosenman.
1860
1861 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
1862 indeed breaks things for older releases.
1863
1864 3. Added additional logging to the case where there is a problem reading data
1865 from a filter that is running in a subprocess using a pipe, in order to
1866 try to track down a specific problem.
1867
1868 4. Testing facility fudge: when running in the test harness and attempting
1869 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
1870 getting "No route to host". Convert this to a timeout.
1871
1872 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
1873 warning.
1874
1875 6. Some OS don't have socklen_t but use size_t instead. This affects the
1876 fifth argument of getsockopt() amongst other things. This is now
1877 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
1878 can be set for individual OS. I have set it for SunOS5, OSF1, and
1879 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
1880 some earlier ones do not.
1881
1882 7. Change 4.30/15 was not doing the test caselessly.
1883
1884 8. The standard form for an IPv6 address literal was being rejected by address
1885 parsing in, for example, MAIL and RCPT commands. An example of this kind of
1886 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
1887 this, as well as the form without the "IPv6" on the front (but only when
1888 address literals are enabled, of course).
1889
1890 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
1891
189210. Exim crashed if a message with an empty sender address specified by -f
1893 encountered a router with an errors_to setting. This could be provoked only
1894 by a command such as
1895
1896 exim -f "" ...
1897
1898 where an empty string was supplied; "<>" did not hit this bug.
1899
190011. Installed PCRE release 4.5.
1901
190212. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
1903 remained set. It is now erased.
1904
190513. exiqgrep wasn't working on MacOS X because it didn't correctly compute
1906 times from message ids (which are base 36 rather than the normal 62).
1907
190814. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
1909 were being counted as actual protocol errors, and logged if the log
1910 selector +smtp_protocol_error was set. One cannot be perfect in this test,
1911 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
1912 and DATA following a set of rejected RCPTs do not count as protocol errors.
1913 In other words, Exim assumes they were pipelined, though this may not
1914 actually be the case. Of course, in all cases the client gets an
1915 appropriate error code.
1916
191715. If a lookup fails in an ACL condition, a message about the failure may
1918 be available; it is used if testing the ACL cannot continue, because most
1919 such messages specify what the cause of the deferral is. However, some
1920 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
1921 that caused an old message to be retained and used if a later statement
1922 caused a defer, replacing the real cause of the deferral.
1923
192416. If an IP address had so many PTR records that the DNS lookup buffer
1925 was not large enough to hold them, Exim could crash while trying to process
1926 the truncated data. It now detects and logs this case.
1927
192817. Further to 4.21/58, another change has been made: if (and only if) the
1929 first line of a message (the first header line) ends with CRLF, a bare LF
1930 in a subsequent header line has a space inserted after it, so as not to
1931 terminate the header.
1932
193318. Refactoring: tidied an ugly bit of code in appendfile that copied data
1934 unnecessarily, used atoi() instead of strtol(), and didn't check the
1935 termination when getting file sizes from file names by regex.
1936
193719. Completely re-implemented the support for maildirsize files, in the light
1938 of a number of problems with the previous contributed implementation
1939 (4.30/29). In particular:
1940
1941 . If the quota is zero, the maildirsize file is maintained, but no quota is
1942 imposed.
1943
1944 . If the maildir directory does not exist, it is created before any attempt
1945 to write a maildirsize file.
1946
1947 . The quota value in the file is just a cache; if the quota is changed in
1948 the transport, the new value overrides.
1949
1950 . A regular expression is available for excluding directories from the
1951 count.
1952
195320. The autoreply transport checks the characters in options that define the
1954 message's headers; it allows continued headers, but it was checking with
1955 isspace() after an embedded newline instead of explicitly looking for a
1956 space or a tab.
1957
195821. If all the "regular" hosts to which an address was routed had passed their
1959 expiry times, and had not reached their retry times, the address was
1960 bounced, even if fallback hosts were defined. Now Exim should go on to try
1961 the fallback hosts.
1962
196322. Increased buffer sizes in the callout code from 1024 to 4096 to match the
1964 equivalent code in the SMTP transport. Some hosts send humungous responses
1965 to HELO/EHLO, more than 1024 it seems.
1966
196723. Refactoring: code in filter.c used (void *) for "any old type" but this
1968 gives compiler warnings in some environments. I've now done it "properly",
1969 using a union.
1970
197124. The replacement for inet_ntoa() that is used with gcc on IRIX systems
1972 (because of problems with the built-in one) was declared to return uschar *
1973 instead of char *, causing compiler failure.
1974
197525. Fixed a file descriptor leak when processing alias/forward files.
1976
197726. Fixed a minor format string issue in dbfn.c.
1978
197927. Typo in exim.c: ("dmbnz" for "dbmnz").
1980
198128. If a filter file refered to $h_xxx or $message_headers, and the headers
1982 contained RFC 2047 "words", Exim's memory could, under certain conditions,
1983 become corrupted.
1984
198529. When a sender address is verified, it is cached, to save repeating the test
1986 when there is more than one recipient in a message. However, when the
1987 verification involves a callout, it is possible for different callout
1988 options to be set for different recipients. It is too complicated to keep
1989 track of this in the cache, so now Exim always runs a verification when a
1990 callout is required, relying on the callout cache for the optimization.
1991 The overhead is duplication of the address routing, but this should not be
1992 too great.
1993
199430. Fixed a bug in callout caching. If a RCPT command caused the sender address
1995 to be verified with callout=postmaster, and the main callout worked but the
1996 postmaster check failed, the verification correctly failed. However, if a
1997 subsequent RCPT command asked for sender verification *without* the
1998 postmaster check, incorrect caching caused this verification also to fail,
1999 incorrectly.
2000
200131. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2002 it was not caching the DNS options (qualify_single, search_parents) that
2003 were used when the lookup failed. A subsequent lookup with different
2004 options therefore always gave the same answer, though there were cases
2005 where it should not have. (Example: a "domains = !$mx_any" option on a
2006 dnslookup router: the "domains" option is always processed without any
2007 widening, but the router might have qualify_single set.) Now Exim uses the
2008 cached value only when the same options are set.
2009
201032. Added John Jetmore's "exipick" utility to the distribution.
2011
201233. GnuTLS: When an attempt to start a TLS session fails for any reason other
2013 than a timeout (e.g. a certificate is required, and is not provided), an
2014 Exim server now closes the connection immediately. Previously it waited for
2015 the client to close - but if the client is SSL, it seems that they each
2016 wait for each other, leading to a delay before one of them times out.
2017
201834: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2019 maintained 0.8.x compatibility because I don't think many are using it, and
2020 it is clearly obsolete.
2021
202235. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2023 transport.
2024
202536. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2026 client certificate was expired. A simple patch fixes this, though I don't
2027 understand the full logic of why the verify callback is called multiple
2028 times.
2029
203037. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2031 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2032 which causes problems with some clients (such as the Certicom SSL Plus
2033 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2034 disables the coutermeasure allowing Eudora to connect."
2035
203638. Exim was not checking that a write() to a log file succeeded. This could
2037 lead to Bad Things if a log got too big, in particular if it hit a file
2038 size limit. Exim now panics and dies if it cannot write to a log file, just
2039 as it does if it cannot open a log file.
2040
204139. Modified OS/Makefile-Linux so that it now contains
2042
2043 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2044
2045 The two -D definitions ensure that Exim is compiled with large file
2046 support, which makes it possible to handle log files that are bigger than
2047 2^31.
2048
204940. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2050 instance) a domain was checked against a named list that involved a lookup,
2051 causing $domain_data to be set, then another domain was checked against the
2052 same list, then the first domain was re-checked, the value of $domain_data
2053 after the final check could be wrong. In particular, if the second check
2054 failed, it could be set empty. This bug probably also applied to
2055 $localpart_data.
2056
205741. The strip_trailing_dot option was not being applied to the address given
2058 with the -f command-line option.
2059
206042. The code for reading a message's header from the spool was incrementing
2061 $received_count, but never initializing it. This meant that the value was
2062 incorrect (doubled) while delivering a message in the same process in which
2063 it was received. In the most common configuration of Exim, this never
2064 happens - a fresh exec is done - but it can happen when
2065 deliver_drop_privilege is set.
2066
206743. When Exim logs an SMTP synchronization error - client data sent too soon -
2068 it now includes up to 150 characters of the unexpected data in the log
2069 line.
2070
207144. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2072 and building data strings. The size of both of these buffers was 10 000
2073 bytes - far larger than anybody would *ever* want, thought I. Needless to
2074 say, somebody hit the limit. I have increased the maximum line length to
2075 20 000 and the maximum data length of concatenated lines to 100 000. I have
2076 also fixed two bugs, because there was no checking on these buffers. Tsk,
2077 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2078 buffer is too small.
2079
208045. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2081 lsearch lookups. Now it does.
2082
208346. When parsing a route_list item in a manualroute router, a fixed-length
2084 buffer was used for the list of hosts. I made this 1024 bytes long,
2085 thinking that nobody would ever have a list of hosts that long. Wrong.
2086 Somebody had a whole pile of complicated expansion conditions, and the
2087 string was silently truncated, leading to an expansion error. It turns out
2088 that it is easier to change to an unlimited length (owing to other changes
2089 that have happened since this code was originally written) than to build
2090 structure for giving a limitation error. The length of the item that
2091 expands into the list of hosts is now unlimited.
2092
209347. The lsearch lookup could not handle data where the length of text line was
2094 more than 4095 characters. Such lines were truncated, leading to shortened
2095 data being returned. It should now handle lines of any length.
2096
209748. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2098 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2099 ACL").
2100
210149. Cosmetic tidy to scripts like exicyclog that are generated by globally
2102 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2103 no longer happens in comment lines. A list of replacements is now placed
2104 at the head of all of the source files, except those whose only change is
2105 to replace PERL_COMMAND in the very first #! line.
2106
210750. Replaced the slow insertion sort in queue.c, for sorting the list of
2108 messages on the queue, with a bottom-up merge sort, using code contributed
2109 by Michael Haardt. This should make operations like -bp somewhat faster on
2110 large queues. It won't affect queue runners, except when queue_run_in_order
2111 is set.
2112
211351. Installed eximstats 1.31 in the distribution.
2114
211552. Added support for SRV lookups to the dnslookup router.
2116
211753. If an ACL referred to $message_body or $message_body_end, the value was not
2118 reset for any messages that followed in the same SMTP session.
2119
212054. The store-handling optimization for building very long strings was not
2121 differentiating between the different store pools. I don't think this
2122 actually made any difference in practice, but I've tidied it.
2123
212455. While running the routers to verify a sender address, $sender_address
2125 was still set to the sender address. This is wrong, because when routing to
2126 send a bounce to the sender, it would be empty. Therefore, I have changed
2127 it so that, while verifying a sender address, $sender_address is set to <>.
2128 (There is no change to what happens when verifying a recipient address.)
2129
213056. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2131 target A or AAAA records (if not already returned) without resetting the
2132 qualify_single or search_parents options of the DNS resolver. These are
2133 inappropriate in this case because the targets of MX and SRV records must
2134 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2135 target that, when qualified, matched something in the local domain. These
2136 two options are now turned off when doing these lookups.
2137
213857. It seems that at least some releases of Reiserfs (which does not have the
2139 concept of a fixed number of inodes) returns zero and not -1 for the
2140 number of available inodes. This interacted badly with check_spool_inodes,
2141 which assumed that -1 was the "no such thing" setting. What I have done is
2142 to check that the total number of inodes is greater than zero before doing
2143 the test of how many are available.
2144
214558. When a "warn" ACL statement has a log_message modifier, the message is
2146 remembered, and not repeated. This is to avoid a lot of repetition when a
2147 message has many recipients that cause the same warning to be written.
2148 Howewer, Exim was preserving the list of already written lines for an
2149 entire SMTP session, which doesn't seem right. The memory is now reset if a
2150 new message is started.
2151
215259. The "rewrite" debugging flag was not showing the result of rewriting in the
2153 debugging output unless log_rewrite was also set.
2154
215560. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2156 of (int)(handle) when we know that handle contains (void *)(-1).
2157
215861. The Exim daemon panic-logs an error return when it closes the incoming
2159 connection. However "connection reset by peer" seems to be common, and
2160 isn't really an error worthy of noting specially, so that particular error
2161 is no long logged.
2162
216362. When Exim is trying to find all the local interfaces, it used to panic and
2164 die if the ioctl to get the interface flags failed. However, it seems that
2165 on at least one OS (Solaris 9) it is possible to have an interface that is
2166 included in the list of interfaces, but for which you get a failure error
2167 for this call. This happens when the interface is not "plumbed" into a
2168 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2169 failure of the "get flags" call assumes that the interface is down.
2170
217163. Added a ${eval10: operator, which assumes all numbers are decimal. This
2172 makes life easier for people who are doing arithmetic on fields extracted
2173 from dates, where you often get leading zeros that should not be
2174 interpreted as octal.
2175
217664. Added qualify_domain to the redirect router, to override the global
2177 setting.
2178
217965. If a pathologically long header line contained very many addresses (the
2180 report of this problem mentioned 10 000) and each of them was rewritten,
2181 Exim could use up a very large amount of memory. (It kept on making new
2182 copies of the header line as it rewrote, and never released the old ones.)
2183 At the expense of a bit more processing, the header rewriting function has
2184 been changed so that it no longer eats memory in this way.
2185
218666. The generation of the Received: header has been moved from the time that a
2187 message starts to be received, to the time that it finishes. The timestamp
2188 in the Received: header should now be very close to that of the <= log
2189 line. There are two side-effects of this change:
2190
2191 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2192 logged header lines no longer include the local Received: line, because
2193 it has not yet been created. The same applies to a copy of the message
2194 that is returned to a non-SMTP sender when a message is rejected.
2195
2196 (b) When a filter file is tested using -bf, no additional Received: header
2197 is added to the test message. After some thought, I decided that this
2198 is a bug fix.
2199
2200 This change does not affect the value of $received_for. It is still set
2201 after address rewriting, but before local_scan() is called.
2202
220367. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2204
220568. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2206 gave an unhelpful panic error message, and a defer error. I have managed to
2207 change this behaviour so that it now rejects any supplied certificate,
2208 which seems right, as the list of acceptable certificates is empty.
2209
221069. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2211 gave an unhelpful defer error. I have not managed to make this reject any
2212 supplied certificates, but the error message it gives is "no certificate
2213 supplied", which is not helpful.
2214
221570. exigrep's output now also includes lines that are not associated with any
2216 message, but which match the given pattern. Implemented by a patch from
2217 Martin Sluka, which also tidied up the Perl a bit.
2218
221971. Recipient callout verification, like sender verification, was using <> in
2220 the MAIL FROM command. This isn't really the right thing, since the actual
2221 sender may affect whether the remote host accepts the recipient or not. I
2222 have changed it to use the actual sender in the callout; this means that
2223 the cache record is now keyed on a recipient/sender pair, not just the
2224 recipient address. There doesn't seem to be a real danger of callout loops,
2225 since a callout by the remote host to check the sender would use <>.
2226 [SEE ABOVE: changed after hitting problems.]
2227
222872. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2229 temporary errors. However, in the case of such a code being given after
2230 the end of a data transmission (i.e. after ".") Exim was failing to write
2231 a retry record for the message. (Yes, there was some broken host that was
2232 actually sending 8xx at this point.)
2233
223473. An unknown lookup type in a host list could cause Exim to panic-die when
2235 the list was checked. (An example that provoked this was putting <; in the
2236 middle of a list instead of at the start.) If this happened during a DATA
2237 ACL check, a -D file could be left lying around. This kind of configuration
2238 error no longer causes Exim to die; instead it causes a defer errror. The
2239 incident is still logged to the main and panic logs.
2240
224174. Buglet left over from Exim 3 conversion. The message "too many messages
2242 in one connection" was written to the rejectlog but not the mainlog, except
2243 when address rewriting (yes!) was being logged.
2244
224575. Added write_rejectlog option.
2246
224776. When a system filter was run not as root (that is, when system_filter_user
2248 was set), the values of the $n variables were not being returned to the
2249 main process; thus, they were not subsequently available in the $sn
2250 variables.
2251
225277. Added +return_path_on_delivery log selector.
2253
225478. A connection timeout was being treated differently from recipients deferred
2255 when testing hosts_max_try with a message that was older than the host's
2256 retry timeout. (The host should not be counted, thus allowing all hosts to
2257 be tried at least once before bouncing.) This may have been the cause of an
2258 occasionally reported bug whereby a message would remain on the queue
2259 longer than the retry timeout, but would be bounced if a delivery was
2260 forced. I say "may" because I never totally pinned down the problem;
2261 setting up timeout/retry tests is difficult. See also the next item.
2262
226379. The ultimate address timeout was not being applied to errors that involved
2264 a combination of host plus message (for example, a timeout on a MAIL
2265 command). When an address resolved to a number of possible hosts, and they
2266 were not all tried for each delivery (e.g. because of hosts_max_try), a
2267 message could remain on the queue longer than the retry timeout.
2268
226980. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2270 Haardt.
2271
227281. Fixed an obscure SMTP outgoing bug which required at least the following
2273 conditions: (a) there was another message waiting for the same server;
2274 (b) the server returned 5xx to all RCPT commands in the first message so
2275 that the message was not completed; (c) the server dropped the connection
2276 or gave a negative response to the RSET that Exim sends to abort the
2277 transaction. The observed case was a dropped connection after DATA that had
2278 been sent in pipelining mode. That is, the server had advertised PIPELINING
2279 but was not implementing it correctly. The effect of the bug was incorrect
2280 behaviour, such as trying another host, and this could lead to a crash.
2281
2282
2283Exim version 4.30
2284-----------------
2285
2286 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2287 and daemon.c were passed as pointers to ints; they should have been
2288 pointers to socklen_t variables (which are typically unsigned ints).
2289
2290 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2291 fixed.
2292
2293 3. Fixed a really odd bug that affected only the testing scheme; patching a
2294 certain fixed string in the binary changed the value of another string that
2295 happened to be identical to the end of the original first string.
2296
2297 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2298 name", it returns that address as the IP address. On some operating
2299 systems (e.g. Solaris), it also passes back the IP address string as the
2300 "host name". However, on others (e.g. Linux), it passes back an empty
2301 string. Exim wasn't checking for this, and was changing the host name to an
2302 empty string, assuming it had been canonicized.
2303
2304 5. Although rare, it is permitted to have more than one PTR record for a given
2305 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2306 all the names associated with an address, because they do in Solaris.
2307 However, it seems that they do not in Linux for data that comes from the
2308 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2309 I found this out when I moved to a new Linux workstation and tried to run
2310 the Exim test suite.
2311
2312 To get round this problem I have changed the code so that it now does its
2313 own call to the DNS to look up PTR records when searching for a host name.
2314 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2315 addresses that are only in /etc/hosts are still found.
2316
2317 This behaviour is, however, controlled by an option called host_lookup_
2318 order, which defaults to "bydns:byaddr". If people want to use the other
2319 order, or indeed, just use one or the other means of lookup, they can
2320 specify it in this variable.
2321
2322 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2323 some operating systems, this comes back from gethostbyaddr() as an empty
2324 string, and this is what Exim used to test for. However, it seems that in
2325 other systems, "." is yielded. Exim now tests for this case too.
2326
2327 7. The values of check_spool_space and check_log_space are now held internally
2328 as a number of kilobytes instead of an absolute number of bytes. If a
2329 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2330 kilobyte. This means that much larger values can be stored.
2331
2332 8. Exim monitor: an attempt to get the action menu when not actually pointing
2333 at a message produces an empty menu entitled "No message selected". This
2334 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2335 no entries in it ("Shell widget menu has zero width and/or height"). So I
2336 have added a single, blank menu entry in this case.
2337
2338 9. Added ${quote_local_part.
2339
234010. MIME decoding is now applied to the contents of Subject: header lines when
2341 they are logged.
2342
234311. Now that a reference to $sender_host_address automatically causes a reverse
2344 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2345 host lookup before query-style lookups in lists that might use this
2346 variable. This has therefore been abolished, and the "net-" prefix is no
2347 longer necessary for query-style lookups.
2348
234912. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2350 have been a typo for LFLAGS, so it has been changed.
2351
235213. The install script calls Exim with "-C /dev/null" in order to find the
2353 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2354 to be output. Howeve, since Exim outputs its version number before the
2355 error, it didn't break the script. It just looked ugly. I fixed this by
2356 always allowing "-C /dev/null" if the caller is root.
2357
235814. Ignore overlarge ACL variable number when reading spool file - insurance
2359 against a later release with more variables having written the file.
2360
236115. The standard form for an IPv6 address literal was being rejected by EHLO.
2362 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2363 this, as well as the form without the "IPv6" on the front.
2364
236516. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2366 OS/Makefile-Darwin file.
2367
236817. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2369 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2370
237118. After change 4.21/52, "%ld" was used to format the contents of the $inode
2372 variable. However, some OS use ints for inodes. I've added cast to long int
2373 to get rid of the compiler warning.
2374
237519. I had forgotten to lock out "/../" in configuration file names when
2376 ALT_CONFIG_PREFIX was set.
2377
237820. Routers used for verification do not need to specify transports. However,
2379 if such a router generated a host list, and callout was configured, Exim
2380 crashed, because it could not find a port number from the (non-existent)
2381 transport. It now assumes port 25 in this circumstance.
2382
238321. Added the -t option to exigrep.
2384
238522. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2386 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2387 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2388 them is set, LOOKUP_LSEARCH is forced.
2389
239023. "exim -bV" now outputs a list of lookups that are included in the binary.
2391
239224. Added sender and host information to the "rejected by local_scan()" log
2393 line; previously there was no indication of these.
2394
239525. Added .include_if_exists.
2396
239726. Change 3.952/11 added an explicit directory sync on top of a file sync for
2398 Linux. It turns out that not all file systems support this. Apparently some
2399 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2400 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2401 not supported on the file descriptor, is now ignored when Exim is trying to
2402 sync a directory. This applies only to Linux.
2403
240427. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2405
240628. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2407 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2408 this.
2409
241029. Added support for maildirsize files from supplied patch (modified a bit).
2411
241230. The use of :fail: followed by an empty string could lead Exim to respond to
2413 sender verification failures with (e.g.):
2414
2415 550 Verification failed for <xxx>
2416 550 Sender verify failed
2417
2418 where the first response line was missing the '-' that indicates it is not
2419 the final line of the response.
2420
242131. The loop for finding the name of the user that called Exim had a hardwired
2422 limit of 10; it now uses the value of finduser_retries, which is used for
2423 all other user lookups.
2424
242532. Added $received_count variable, available in data and not_smtp ACLs, and at
2426 delivery time.
2427
242833. Exim was neglecting to zero errno before one call of strtol() when
2429 expanding a string and expecting an integer value. On some systems this
2430 resulted in spurious "integer overflow" errors. Also, it was casting the
2431 result into an int without checking.
2432
243334. Testing for a connection timeout using "timeout_connect" in the retry rules
2434 did not work. The code looks as if it has *never* worked, though it appears
2435 to have been documented since at least releast 1.62. I have made it work.
2436
243735. The "timeout_DNS" error in retry rules, also documented since at least
2438 1.62, also never worked. As it isn't clear exactly what this means, and
2439 clearly it isn't a major issue, I have abolished the feature by treating it
2440 as "timeout", and writing a warning to the main and panic logs.
2441
244236. The display of retry rules for -brt wasn't always showing the error code
2443 correctly.
2444
244537. Added new error conditions to retry rules: timeout_A, timeout_MX,
2446 timeout_connect_A, timeout_connect_MX.
2447
244838. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2449 to the empty sender.
2450
245139. The daemon was not analysing the content of -oX till after it had closed
2452 stderr and disconnected from the controlling terminal. This meant that any
2453 syntax errors were only noted on the panic log, and the return code from
2454 the command was 0. By re-arranging the code a little, I've made the
2455 decoding happen first, so such errors now appear on stderr, and the return
2456 code is 1. However, the actual setting up of the sockets still happens in
2457 the disconnected process, so errors there are still only recorded on the
2458 panic log.
2459
246040. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2461 connections (as happens on some IP stacks) was logged at start up time as
2462 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2463 it from "IPv6 and IPv4", which means that two separate sockets are being
2464 used.
2465
246641. The debug output for gethostbyname2() or getipnodebyname() failures now
2467 says whether AF_INET or AF_INET6 was passed as an argument.
2468
246942. Exiwhat output was messed up when time zones were included in log
2470 timestamps.
2471
247243. Exiwhat now gives more information about the daemon's listening ports,
2473 and whether -tls-on-connect was used.
2474
247544. The "port" option of the smtp transport is now expanded.
2476
247745. A "message" modifier in a "warn" statement in a non-message ACL was being
2478 silently ignored. Now an error message is written to the main and panic
2479 logs.
2480
248146. There's a new ACL modifier called "logwrite" which writes to a log file
2482 as soon as it is encountered.
2483
248447. Added $local_user_uid and $local_user_gid at routing time.
2485
248648. Exim crashed when trying to verify a sender address that was being
2487 rewritten to "<>".
2488
248949. Exim was recognizing only a space character after ".include". It now also
2490 recognizes a tab character.
2491
249250. Fixed several bugs in the Perl script that creates the exim.8 man page by
2493 extracting the relevant information from the specification. The man page no
2494 longer contains scrambled data for the -d option, and I've added a section
2495 at the front about calling Exim under different names.
2496
249751. Added "extra_headers" argument to the "mail" command in filter files.
2498
249952. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2500 crash.
2501
250253. Installed eximstats 1.29.
2503
250454. Added transport_filter_timeout as a generic transport option.
2505
250655. Exim no longer adds an empty Bcc: header to messages that have no To: or
2507 Cc: header lines. This was required by RFC 822, but it not required by RFC
2508 2822.
2509
251056. Exim used to add From:, Date:, and Message-Id: header lines to any
2511 incoming messages that did not have them. Now it does so only if the
2512 message originates locally, that is, if there is no associated remote host
2513 address. When Resent- header lines are present, this applies to the Resent-
2514 lines rather than the non-Resent- lines.
2515
251657. Drop incoming SMTP connection after too many syntax or protocol errors. The
2517 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
2518
251958. Messages for configuration errors now include the name of the main
2520 configuration file - useful now that there may be more than one file in a
2521 list (.included file names were always shown).
2522
252359. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2524 for those rare installations that do not start the daemon as root or run it
2525 setuid root. I've cut out the call to initgroups() if the daemon is not
2526 root at that time.
2527
252860. The Exim user and group can now be bound into the binary as text strings
2529 that are looked up at the start of Exim's processing.
2530
253161. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
2532
253362. Added $mailstore_basename variable.
2534
253563. Installed patch to sieve.c from Michael Haardt.
2536
253764. When Exim failed to open the panic log after failing to open the main log,
2538 the original message it was trying to log was written to stderr and debug
2539 output, but if they were not available (the usual case in production), it
2540 was lost. Now it is written to syslog before the two lines that record the
2541 failures to open the logs.
2542
254365. Users' Exim filters run in subprocesses under the user's uid. It is
2544 possible for a "deliver" command or an alias in a "personal" command to
2545 provoke an address rewrite. If logging of address rewriting is configured,
2546 this fails because the process is not running as root or exim. There may be
2547 a better way of dealing with this, but for the moment (because 4.30 needs
2548 to be released), I have disabled address rewrite logging when running a
2549 filter in a non-root, non-exim process.
2550
2551
2552Exim version 4.24
2553-----------------
2554
2555 1. The buildconfig auxiliary program wasn't quoting the value set for
2556 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2557 not defined. This bug was masked in 4.22 by the effect that was fixed in
2558 change 4.23/1.
2559
2560 2. Some messages that were rejected after a message id was allocated were
2561 shown as "incomplete" by exigrep. It no longer does this for messages that
2562 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2563
2564 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2565 have allow_domain_literals set, the ID did not get logged in the <= line.
2566 Domain literals are now always recognized in Message-ID: header lines.
2567
2568 4. The first argument for a ${extract expansion item is the key name or field
2569 number. Leading and trailing spaces in this item were not being ignored,
2570 causing some misleading effects.
2571
2572 5. When deliver_drop_privilege was set, single queue runner processes started
2573 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2574 same command in the process it spins off) were not dropping privilege.
2575
2576 6. When the daemon running as "exim" started a queue runner, it always
2577 re-executed Exim in the spun-off process. This is a waste of effort when
2578 deliver_drop_privilege is set. The new process now just calls the
2579 queue-runner function directly.
2580
2581
2582Exim version 4.23
2583-----------------
2584
2585 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2586 HEADERS_CHARSET.
2587
2588 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2589 ignored. Though the use of -oP was forcing the writing of a pid file, it
2590 was always written to the default place.
2591
2592 3. If the message "no IP address found for host xxxx" is generated during
2593 incoming verification, it is now followed by identification of the incoming
2594 connection (so you can more easily find what provoked it).
2595
2596 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2597
2598 5. Added some features to "harden" Exim a bit more against certain attacks:
2599
2600 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2601 be put in Local/Makefile. This is like the never_users runtime option,
2602 but it cannot be overridden. The default setting is "root".
2603
2604 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2605 prefix string with which any file named in a -C command line option
2606 must start.
2607
2608 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2609 is retained for -C and -D only if the caller of Exim is root. Without
2610 it, the exim user may also use -C and -D and retain privilege.
2611
2612 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2613 command line option is disabled.
2614
2615 6. Macro names set by the -D option must start with an upper case letter, just
2616 like macro names defined in the configuration file.
2617
2618 7. Added "dereference=" facility to LDAP.
2619
2620 8. Two instances of the typo "uknown" in the source files are fixed.
2621
2622 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2623 the Configure-Makefile script screwed up while processing it.
2624
262510. Incorporated PCRE 4.4.
2626
262711. The SMTP synchronization check was not operating right at the start of an
2628 SMTP session. For example, it could not catch a HELO sent before the client
2629 waited for the greeting. There is now a check for outstanding input at the
2630 point when the greeting is written. Because of the duplex, asynchronous
2631 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2632 way, but not yet received, when the check is performed.
2633
263412. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2635 on TCP/IP sockets, because this apparently causes some broken clients to
2636 timeout.
2637
263813. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2639 unchanged) from the Cygwin maintainer.
2640
264114. The code for -bV that shows what is in the binary showed "mbx" when maildir
2642 was supported instead of testing for mbx. Effectively a typo.
2643
264415. The spa authenticator server code was not checking that the input it
2645 received was valid base64.
2646
264716. The debug output line for the "set" modifier in ACLs was not showing the
2648 name of the variable that was being set.
2649
265017. Code tidy: the variable type "vtype_string" was never used. Removed it.
2651
265218. Previously, a reference to $sender_host_name did not cause a DNS reverse
2653 lookup on its own. Something else was needed to trigger the lookup. For
2654 example, a match in host_lookup or the need for a host name in a host list.
2655 Now, if $sender_host_name is referenced and the host name has not yet been
2656 looked up, a lookup is performed. If the lookup fails, the variable remains
2657 empty, and $host_lookup_failed is set to "1".
2658
265919. Added "eqi" as a case-independent comparison operator.
2660
266120. The saslauthd authentication condition could segfault if neither service
2662 nor realm was specified.
2663
266421. If an overflowing value such as "2048M" was set for message_size_limit, the
2665 error message that was logged was misleading, and incoming SMTP
2666 connections were dropped. The message is now more accurate, and temporary
2667 errors are given to SMTP connections.
2668
266922. In some error situations (such as 21 above) Exim rejects all SMTP commands
2670 (except RSET) with a 421 error, until QUIT is received. However, it was
2671 failing to send a response to QUIT.
2672
267323. The HELO ACL was being run before the code for helo_try_verify_hosts,
2674 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2675 ACL is now run after the helo_try_verify_hosts code.
2676
267724. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2678 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2679 case-independent, so other case variants are also recognized). Apparently
2680 some systems use these upper case variants.
2681
268225. If more than two messages were waiting for the same host, and a transport
2683 filter was specified for the transport, Exim sent two messages over the
2684 same TCP/IP connection, and then failed with "socket operation on non-
2685 socket" when it tried to send the third.
2686
268726. Added Exim::debug_write and Exim::log_write for embedded Perl use.
2688
268927. The extern definition of crypt16() in expand.c was not being excluded when
2690 the OS had its own crypt16() function.
2691
269228. Added bounce_return_body as a new option, and bounce_return_size_limit
2693 as a preferred synonym for return_size_limit, both as an option and as an
2694 expansion variable.
2695
269629. Added LIBS=-liconv to OS/Makefile-OSF1.
2697
269830. Changed the default configuration ACL to relax the local part checking rule
2699 for addresses that are not in any local domains. For these addresses,
2700 slashes and pipe symbols are allowed within local parts, but the sequence
2701 /../ is explicitly forbidden.
2702
270331. SPA server authentication was not clearing the challenge buffer before
2704 using it.
2705
270632. log_message in a "warn" ACL statement was writing to the reject log as
2707 well as to the main log, which contradicts the documentation and doesn't
2708 seem right (because no rejection is happening). So I have stopped it.
2709
271033. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2711 However, I am unable to do any testing of this.
2712
271334. Fixed an infelicity in the appendfile transport. When checking directories
2714 for a mailbox, to see if any needed to be created, it was accidentally
2715 using path names with one or more superfluous leading slashes; tracing
2716 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
2717
271835. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2719 contents are added to the log line that is written for every discarded
2720 recipient. (Previously a log_message setting was ignored.)
2721
272236. The ${quote: operator now quotes the string if it is empty.
2723
272437. The install script runs exim in order to find its version number. If for
2725 some reason other than non-existence or emptiness, which it checks, it
2726 could not run './exim', it was installing it with an empty version number,
2727 i.e. as "exim-". This error state is now caught, and the installation is
2728 aborted.
2729
273038. An argument was missing from the function that creates an error message
2731 when Exim fails to connect to the socket for saslauthd authentication.
2732 This could cause Exim to crash, or give a corrupted message.
2733
273439. Added isip, isip4, and isip6 to ${if conditions.
2735
273640. The ACL variables $acl_xx are now saved with the message, and can be
2737 accessed later in routers, transports, and filters.
2738
273941. The new lookup type nwildlsearch is like wildlsearch, except that the key
2740 strings in the file are not string-expanded.
2741
274242. If a MAIL command specified a SIZE value that was too large to fit into an
2743 int variable, the check against message_size_limit failed. Such values are
2744 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
2745 day this will have to be increased, but I don't think I want to be around
2746 when emails are that large.
2747
2748
2749
2750Exim version 4.22
2751-----------------
2752
2753 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
2754 iconv() is not standard in FreeBSD.
2755
2756 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
2757 IPv6 enabled. The observed symptom was a segmentation fault on return from
2758 the function os_common_find_running_interfaces() in src/os.c.
2759
2760 3. In the check_special_case() function in daemon.c I had used "errno" as an
2761 argument name, which causes warnings on some systems. This was basically a
2762 typo, since it was named "eno" in the comments!
2763
2764 4. The code that waits for the clock to tick (at a resolution of some fraction
2765 of a second) so as to ensure message-id uniqueness was always waiting for
2766 at least one whole tick, when it could have waited for less. [This is
2767 almost certainly not relevant at current processor speeds, where it is
2768 unlikely to ever wait at all. But we try to future-proof.]
2769
2770 5. The function that sleeps for a time interval that includes fractions of a
2771 second contained a race. It did not block SIGALRM between setting the
2772 timer, and suspending (a couple of lines later). If the interval was short
2773 and the sigsuspend() was delayed until after it had expired, the suspension
2774 never ended. On busy systems this could lead to processes getting stuck for
2775 ever.
2776
2777 6. Some uncommon configurations may cause a lookup to happen in a queue runner
2778 process, before it forks any delivery processes. The open lookup caching
2779 mechanism meant that the open file or database connection was passed into
2780 the delivery process. The problem was that delivery processes always tidy
2781 up cached lookup data. This could cause a problem for the next delivery
2782 process started by the queue runner, because the external queue runner
2783 process does not know about the closure. So the next delivery process
2784 still has data in the lookup cache. In the case of a file lookup, there was
2785 no problem because closing a file descriptor in a subprocess doesn't affect
2786 the parent. However, if the lookup was caching a connection to a database,
2787 the connection was closed, and the second delivery process was likely to
2788 see errors such as "PGSQL: query failed: server closed the connection
2789 unexpectedly". The problem has been fixed by closing all cached lookups
2790 in a queue runner before running a delivery process.
2791
2792 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
2793 seem to have the "const" qualifier which it has on other OS. I've
2794 parameterised it.
2795
2796 8. Change 4.21/2 was too strict. It is only if there are two authenticators
2797 *of the same type* (client or server) with the same public name that an
2798 error should be diagnosed.
2799
2800 9. When Exim looked up a host name for an IP address, but failed to find the
2801 original IP address when looking up the host name (a safety check), it
2802 output the message "<ip address> does not match any IP for NULL", which was
2803 confusing, to say the least. The bug was that the host name should have
2804 appeared instead of "NULL".
2805
280610. Since release 3.03, if Exim is called by a uid other than root or the Exim
2807 user that is built into the binary, and the -C or -D options is used, root
2808 privilege is dropped before the configuration file is read. In addition,
2809 logging is switched to stderr instead of the normal log files. If the
2810 configuration then re-defines the Exim user, the unprivileged environment
2811 is probably not what is expected, so Exim logs a panic warning message (but
2812 proceeds).
2813
2814 However, if deliver_drop_privilege is set, the unprivileged state may well
2815 be exactly what is intended, so the warning has been cut out in that case,
2816 and Exim is allowed to try to write to its normal log files.
2817
2818
2819Exim version 4.21
2820-----------------
2821
2822 1. smtp_return_error_details was not giving details for temporary sender
2823 or receiver verification errors.
2824
2825 2. Diagnose a configuration error if two authenticators have the same public
2826 name.
2827
2828 3. Exim used not to create the message log file for a message until the first
2829 delivery attempt. This could be confusing when incoming messages were held
2830 for policy or load reasons. The message log file is now created at the time
2831 the message is received, and an initial "Received" line is written to it.
2832
2833 4. The automatically generated man page for command line options had a minor
2834 bug that caused no ill effects; however, a more serious problem was that
2835 the procedure for building the man page automatically didn't always
2836 operate. Consequently, release 4.20 contains an out-of-date version. This
2837 shouldn't happen again.
2838
2839 5. When building Exim with embedded Perl support, the script that builds the
2840 Makefile was calling 'perl' to find its compile-time parameters, ignoring
2841 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
2842
2843 6. The freeze_tell option was not being used for messages that were frozen on
2844 arrival, either by an ACL or by local_scan().
2845
2846 7. Added the smtp_incomplete_transaction log selector.
2847
2848 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
2849 was accepting AUTH without a new EHLO.
2850
2851 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
2852 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
2853 RFC.
2854
285510. Logging of TCP/IP connections (when configured) now happens in the main
2856 daemon process instead of the child process, so that the TCP/IP connection
2857 count is more accurate (but it can never be perfect).
2858
285911. The use of "drop" in a nested ACL was not being handled correctly in the
2860 outer ACL. Now, if condition failure induced by the nested "drop" causes
2861 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
2862 or "require"), the connection is dropped.
2863
286412. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
2865 that yield "discard" can now be used with an "accept" or a "discard" verb,
2866 but an error is generated for any others (because I can't see a useful way
2867 to define what should happen).
2868
286913. When an ACL is read dynamically from a file (or anywhere else), the lines
2870 are now processed in the same way as lines in the Exim configuration file.
2871 In particular, continuation lines are supported.
2872
287314. Added the "dnslists = a.b.c!=n.n.n.n" feature.
2874
287515. Added -ti meaning -t -i.
2876
287716. Check for letters, digits, hyphens, and dots in the names of dnslist
2878 domains, and warn by logging if others are found.
2879
288017. At least on BSD, alignment is not guarenteed for the array of ifreq's
2881 returned from GIFCONF when Exim is trying to find the list of interfaces on
2882 a host. The code in os.c has been modified to copy each ifreq to an aligned
2883 structure in all cases.
2884
2885 Also, in some cases, the returned ifreq's were being copied to a 'struct
2886 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
2887 means the last couple of bytes of an IPv6 address could be chopped if the
2888 ifreq contained only a normal sockaddr (14 bytes storage).
2889
289018. Named domain lists were not supported in the hosts_treat_as_local option.
2891 An entry such as +xxxx was not recognized, and was treated as a literal
2892 domain name.
2893
289419. Ensure that header lines added by a DATA ACL are included in the reject log
2895 if the ACL subsequently rejects the message.
2896
289720. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
2898 MD5 (which is deprecated).
2899
290021. When testing a filter file using -bf, Exim was writing a message when it
2901 took the sender from a "From " line in the message, but it was not doing so
2902 when it took $return_path from a Return-Path: header line. It now does.
2903
290422. If the contents of a "message" modifier for a "warn" ACL verb do not begin
2905 with a valid header line field name (a series of printing characters
2906 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
2907
290823. Changed "disc" in the source to "disk" to conform to the documentation and
2909 the book and for uniformity.
2910
291124. Ignore Sendmail's -Ooption=value command line item.
2912
291325. When execve() failed while trying to run a command in a pipe transport,
2914 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
2915 could be confused with a return value of 69 from the command itself. This
2916 has been changed to 127, the value the shell returns if it is asked to run
2917 a non-existent command. The wording for the related log line suggests a
2918 non-existent command as the problem.
2919
292026. If received_header_text expands to an empty string, do not add a Received:
2921 header line to the message. (Well, it adds a token one on the spool, but
2922 marks it "old" so that it doesn't get used or transmitted.)
2923
292427. Installed eximstats 1.28 (addition of -nt option).
2925
292628. There was no check for failure on the call to getsockname() in the daemon
2927 code. This can fail if there is a shortage of resources on the system, with
2928 ENOMEM, for example. A temporary error is now given on failure.
2929
293029. Contrary to the C standard, it seems that in some environments, the
2931 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
2932 program. Exim now does this explicitly; it affects the formatting of
2933 timestamps using strftime().
2934
293530. If exiqsumm was given junk data, it threw up some uninitialized variable
2936 complaints. I've now initialized all the variables, to avoid this.
2937
293832. Header lines added by a system filter were not being "seen" during
2939 transport-time rewrites.
2940
294133. The info_callback() function passed to OpenSSL is set up with type void
2942 (*)(SSL *, int, int), as described somewhere. However, when calling the
2943 function (actually a macro) that sets it up, the type void(*)() is
2944 expected. I've put in a cast to prevent warnings from picky compilers.
2945
294634. If a DNS black list lookup found a CNAME record, but there were no A
2947 records associated with the domain it pointed at, Exim crashed.
2948
294935. If a DNS black list lookup returned more than one A record, Exim ignored
2950 all but the first. It now scans all returned addresses if a particular IP
2951 value is being sought. In this situation, the contents of the
2952 $dnslist_value variable are a list of all the addresses, separated by a
2953 comma and a space.
2954
295536. Tightened up the rules for host name lookups using reverse DNS. Exim used
2956 to accept a host name and all its aliases if the forward lookup for any of
2957 them yielded the IP address of the incoming connection. Now it accepts only
2958 those names whose forward lookup yields the correct IP address. Any other
2959 names are discarded. This closes a loophole whereby a rogue DNS
2960 administrator could create reverse DNS records to break through a
2961 wildcarded host restriction in an ACL.
2962
296337. If a user filter or a system filter that ran in a subprocess used any of
2964 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
2965 the wrong values were passed to the pipe command ($thisaddress had the
2966 value of $0, $0 had the value of $1, etc). This bug was introduced by
2967 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
2968
296938. Improved the line breaking for long SMTP error messages from ACLs.
2970 Previously, if there was no break point between 40 and 75 characters, Exim
2971 left the rest of the message alone. Two changes have been made: (a) I've
2972 reduced the minimum length to 35 characters; (b) if it can't find a break
2973 point between 35 and 75 characters, it looks ahead and uses the first one
2974 that it finds. This may give the occasional overlong line, but at least the
2975 remaining text gets split now.
2976
297739. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
2978 file descriptors might be low, and that setting 1000 would always raise it.
2979 It turns out that in some environments, the limit is already over 1000 and
2980 that lowering it causes trouble. So now Exim takes care not to decrease it.
2981
298240. When delivering a message, the value of $return_path is set to $sender_
2983 address at the start of routing (routers may change the value). By an
2984 oversight, this default was not being set up when an address was tested by
2985 -bt or -bv, which affected the outcome if any router or filter referred to
2986 $return_path.
2987
298841. The idea of the "warn" ACL verb is that it adds a header or writes to the
2989 log only when "message" or "log_message" are set. However, if one of the
2990 conditions was an address verification, or a call to a nested ACL, the
2991 messages generated by the underlying test were being passed through. This
2992 no longer happens. The underlying message is available in $acl_verify_
2993 message for both "message" and "log_message" expansions, so it can be
2994 passed through if needed.
2995
299642. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
2997 new expansion $bh_ to give the encoded byte string without charset
2998 translation. Translation happens only if iconv() is available; HAVE_ICONV
2999 indicates this at build time. HEADERS_CHARSET gives the charset to
3000 translate to; headers_charset can change it in the configuration, and
3001 "headers charset" can change it in an individual filter file.
3002
300343. Now that we have a default RFC 2047 charset (see above), the code in Exim
3004 that creates RFC 2047 encoded "words" labels them as that charset instead
3005 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3006 expansion operator; (ii) when Exim creates a From: line for a local
3007 message; (iii) when a header line is rewritten to include a "phrase" part.
3008
300944. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3010 buggy, causing it to skip the first lines of messages whose message ID
3011 ended in 'D'. This would not have bitten before Exim release 4.14, because
3012 message IDs were unlikely to end in 'D' before then. The effect was to have
3013 incorrect size information for certain domains.
3014
301545. #include "config.h" was missing at the start of the crypt16.c module. This
3016 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3017 noticed.
3018
301946. If there was a timeout during a "random" callout check, Exim treated it as
3020 a failure of the random address, and carried on sending RSET and the real
3021 address. If the delay was just some slowness somewhere, the response to the
3022 original RCPT would be taken as a response to RSET and so on, causing
3023 mayhem of various kinds.
3024
302547. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3026 when I implemented it. It didn't allow for the fact that some option values
3027 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3028 the right test for positive values.
3029
303048. Domain names in DNS records are case-independent. Exim always looks them up
3031 in lower case. Some resolvers return domain names in exactly the case they
3032 appear in the zone file, that is, they may contain uppercase letters. Not
3033 all resolvers do this - some return always lower case. Exim was treating a
3034 change of case by a resolver as a change of domain, similar to a widening
3035 of a domain abbreviation. This triggered its re-routing code and so it was
3036 trying to route what was effectively the same domain again. This normally
3037 caused routing to fail (because the router wouldn't handle the domain
3038 twice). Now Exim checks for this case specially, and just changes the
3039 casing of the domain that it ultimately uses when it transmits the message
3040 envelope.
3041
304249. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3043 module.
3044
304550. If a filter generated a file delivery with a non-absolute name (possible if
3046 no home directory exists for the router), the forbid_file option was not
3047 forbidding it.
3048
304951. Added '&' feature to dnslists, to provide bit mask matching in addition to
3050 the existing equality matching.
3051
305252. Exim was using ints instead of ino_t variables in some places where it was
3053 dealing with inode numbers.
3054
305553. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3056 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3057 called TMPDIR, and if it finds it is different, it changes its value.
3058
305954. The smtp_printf() function is now made available to local_scan() so
3060 additional output lines can be written before returning. There is also an
3061 smtp_fflush() function to enable the detection of a dropped connection.
3062 The variables smtp_input and smtp_batched_input are exported to
3063 local_scan().
3064
306555. Changed the default runtime configuration: the message "Unknown user"
3066 has been removed from the ACL, and instead placed on the localuser router,
3067 using the cannot_route_message feature. This means that any verification
3068 failures that generate their own messages won't get overridden. Similarly,
3069 the "Unrouteable address" message that was in the ACL for unverifiable
3070 relay addresses has also been removed.
3071
307256. Added hosts_avoid_esmtp to the smtp transport.
3073
307457. The exicyclog script was not checking for the esoteric option
3075 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3076 will work only if exicyclog is run under the appropriate euid.
3077
307858. Following a discussion on the list, the rules by which Exim recognises line
3079 endings on incoming messages have been changed. The -dropcr and drop_cr
3080 options are now no-ops, retained only for backwards compatibility. The
3081 following line terminators are recognized: LF CRLF CR. However, special
3082 processing applies to CR:
3083
3084 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3085 nor a local message in the state where . is a terminator.
3086
3087 (ii) If a bare CR is encountered in a header line, an extra space is added
3088 after the line terminator so as not to end the header. The reasoning
3089 behind this is that bare CRs in header lines are most likely either
3090 to be mistakes, or people trying to play silly games.
3091
309259. The size of a message, as listed by "-bp" or in the Exim monitor window,
3093 was being incorrectly given as 18 bytes larger than it should have been.
3094 This is a VOB (very old bug).
3095
309660. This may never have affected anything current, but just in case it has:
3097 When the local host is found other than at the start of a list of hosts,
3098 the local host, those with the same MX, and any that follow, are discarded.
3099 When the list in question was part of a longer list of hosts, the following
3100 hosts (not currently being processed) were also being discarded. This no
3101 longer happens. I'm not sure if this situation could ever has previously
3102 arisen.
3103
310461. Added the "/MX" feature to lists of hosts in the manualroute and query
3105 program routers.
3106
310762. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3108 header. This is something that is recommended in a new Internet Draft, and
3109 is something that is documented as being done by Sendmail. There are two
3110 possible values. For messages generated by the autoreply transport, Exim
3111 adds:
3112
3113 Auto-Submitted: auto-replied
3114
3115 whereas for all other generated messages (e.g. bounces) it adds
3116
3117 Auto-Submitted: auto-generated
3118
311963. The "personal" condition in filters now includes a test for the
3120 Auto-Submitted: header. If it contains the string "auto-" the message it
3121 not considered personal.
3122
312364. Added rcpt_include_affixes as a generic transport option.
3124
312565. Added queue_only_override (default true).
3126
312766. Added the syslog_duplication option.
3128
312967. If what should have been the first header line of a message consisted of
3130 a space followed by a colon, Exim was mis-interpreting it as a header line.
3131 It isn't of course - it is syntactically invalid and should therefore be
3132 treated as the start of the message body. The misbehaviour could have
3133 caused a number of strange effects, including loss of data in subsequent
3134 header lines, and spool format errors.
3135
313668. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3137 client host had authenticated. This control can now be exercised by an ACL
3138 for more flexibility.
3139
314069. By default, callouts do not happen when testing with -bh. There is now a
3141 variant, -bhc, which does actually run the callout code, including
3142 consulting and updating the callout cache.
3143
314470. Added support for saslauthd authentication, courtesy of Alexander
3145 Sabourenkov.
3146
314771. If statvfs() failed on the spool or log directories while checking their
3148 size for availability, Exim confusingly gave the error "space shortage".
3149 Furthermore, in debugging mode it crashed with a floating point exception.
3150 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3151 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3152 serious problem, Exim now writes to the main and panic logs when this
3153 happens, with details of the failure. It then refuses to accept the
3154 incoming message, giving the message "spool directory problem" or "log
3155 directory problem" with a 421 code for SMTP messages.
3156
315772. When Exim is about to re-exec itself, it ensures that the file descriptors
3158 0, 1, and 2 exist, because some OS complain for execs without them (see
3159 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3160 descriptors. However, the code omitted to check that the open succeeded,
3161 causing mysterious errors if for some reason the permissions on /dev/null
3162 got screwed. Now Exim writes a message to the main and panic logs, and
3163 bombs out if it can't open /dev/null.
3164
316573. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3166 interact so that it is all more flexible. It is supposed to remain
3167 backwards compatible. Also added extra_local_interfaces.
3168
316974. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3170 to bomb out with an assertion failure - to the client this appears as a
3171 connection drop. This problem occurs in the part of the code that was taken
3172 from the Samba project. Fortunately, the assertion is in a very simple
3173 function, so I have fixed this by reproducing the function inline in the
3174 one place where it is called, and arranging for authentication to fail
3175 instead of killing the process with assert().
3176
317775. The SPA client code was not working when the server requested OEM rather
3178 than Unicode encoding.
3179
318076. Added code to make require_files with a specific uid setting more usable in
3181 the case where statting the file as root fails - usually a non-root-mounted
3182 NFS file system. When this happens and the failure is EACCES, Exim now
3183 forks a subprocess and does the per-uid checking as the relevant uid.
3184
318577. Added process_log_path.
3186
318778. If log_file_path was not explicitly set, a setting of check_log_space or
3188 check_log_inodes was ignored.
3189
319079. If a space check for the spool or log partitions fails, the incident is now
3191 logged. Of course, in the latter case the data may get lost...
3192
319380. Added the %p formatting code to string_format() so that it can be used to
3194 print addresses in debug_print(). Adjusted all the address printing in the
3195 debugging in store.c to use %p rather than %d.
3196
319781. There was a concern that a line of code in smtp_in.c could overflow a
3198 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3199 initially expressed, the concern was not well-founded, because trailing
3200 spaces are removed early. However, if the trailing spaces were followed by
3201 a NULL, they did not get removed, so the overflow was possible. Two fixes
3202 were applied:
3203
3204 (a) I re-wrote the offending code in a cleaner fashion.
3205 (b) If an incoming SMTP command contains a NULL character, it is rejected
3206 as invalid.
3207
320882. When Exim changes uid/gid to the Exim user at daemon start time, it now
3209 runs initgroups(), so that if the Exim user is in any additional groups,
3210 they will be used during message reception.
3211
3212
3213Exim version 4.20
3214-----------------
3215
3216The change log for 4.20 and earlier releases has been archived.
3217
3218****