and INCLUDE directives appropriately,
or set PCRE2_CONFIG=yes to use the installed &(pcre-config)& command.
If your operating system has no
-PCRE2 support then you will need to obtain and build the current PCRE
+PCRE2 support then you will need to obtain and build the current PCRE2
from &url(https://github.com/PhilipHazel/pcre2/releases).
More information on PCRE2 is available at &url(https://www.pcre.org/).
.next
To complicate things further, there are several very different versions of the
Berkeley DB package. Version 1.85 was stable for a very long time, releases
-2.&'x'& and 3.&'x'& were current for a while, but the latest versions when Exim last revamped support were numbered 4.&'x'&.
-Maintenance of some of the earlier releases has ceased. All versions of
-Berkeley DB could be obtained from
+2.&'x'& and 3.&'x'& were current for a while,
+.new
+but the latest versions when Exim last revamped support were numbered 5.&'x'&.
+Maintenance of some of the earlier releases has ceased,
+and Exim no longer supports versions before 3.&'x'&.
+.wen
+All versions of Berkeley DB could be obtained from
&url(http://www.sleepycat.com/), which is now a redirect to their new owner's
page with far newer versions listed.
It is probably wise to plan to move your storage configurations away from
domains = lsearch;/some/file
.endd
The first uses a string expansion, the result of which must be a domain list.
+.new
+The key for an expansion-style lookup must be given explicitly.
+.wen
No strings have been specified for a successful or a failing lookup; the
defaults in this case are the looked-up data and an empty string, respectively.
The expansion takes place before the string is processed as a list, and the
Any data that follows the keys is not relevant when checking that the domain
matches the list item.
+.new
+The key for a list-style lookup is implicit, from the lookup context, if
+the lookup is a single-key type (see below).
+For query-style lookup types the key must be given explicitly.
+.wen
+
It is possible, though no doubt confusing, to use both kinds of lookup at once.
Consider a file containing lines like this:
.code
and a single key to search for. The key must be a non-empty string for the
lookup to succeed. The lookup type determines how the file is searched.
.cindex "tainted data" "single-key lookups"
-The file string may not be tainted
+The file string may not be tainted.
.cindex "tainted data" "de-tainting"
All single-key lookups support the option &"ret=key"&.
&*tls*&
Controls the use of TLS on the connection.
Values are &"yes"& or &"no"& (the default).
-If it is enabled, a shutdown as descripbed above is never done.
+If it is enabled, a shutdown as described above is never done.
.endlist
.cindex "&%pam%& expansion condition"
&'Pluggable Authentication Modules'&
(&url(https://mirrors.edge.kernel.org/pub/linux/libs/pam/)) are a facility that is
-available in the latest releases of Solaris and in some GNU/Linux
-distributions. The Exim support, which is intended for use in conjunction with
+available in Solaris
+and in some GNU/Linux distributions.
+The Exim support, which is intended for use in conjunction with
the SMTP AUTH command, is available only if Exim is compiled with
.code
SUPPORT_PAM=yes
.cindex "ESMTP extensions" DSN
DSN extensions (RFC3461) will be advertised in the EHLO message to,
and accepted from, these hosts.
-Hosts may use the NOTIFY and ENVID options on RCPT TO commands,
-and RET and ORCPT options on MAIL FROM commands.
+Hosts may use the NOTIFY and ORCPT options on RCPT TO commands,
+and RET and ENVID options on MAIL FROM commands.
A NOTIFY=SUCCESS option requests success-DSN messages.
A NOTIFY= option with no argument requests that no delay or failure DSNs
are sent.
(the "ffdhe" identifiers).
At this point, all of the "ike" values should be considered obsolete;
-they're still in Exim to avoid breaking unusual configurations, but are
+they are still in Exim to avoid breaking unusual configurations, but are
candidates for removal the next time we have backwards-incompatible changes.
+.new
+Two of them in particular (&`ike1`& and &`ike22`&) are called out by RFC 8247
+as MUST NOT use for IPSEC, and two more (&`ike23`& and &`ike24`&) as
+SHOULD NOT.
+Because of this, Exim regards them as deprecated; if either of the first pair
+are used, warnings will be logged in the paniclog, and if any are used then
+warnings will be logged in the mainlog.
+All four will be removed in a future Exim release.
+.wen
The TLS protocol does not negotiate an acceptable size for this; clients tend
to hard-drop connections if what is offered by the server is unacceptable,
the message override the banner message that is otherwise specified by the
&%smtp_banner%& option.
+.new
+For tls-on-connect connections, the ACL is run after the TLS connection
+is accepted (however, &%host_reject_connection%& is tested before).
+.wen
+
.section "The EHLO/HELO ACL" "SECID192"
.cindex "EHLO" "ACL for"
This control turns on debug logging, almost as though Exim had been invoked
with &`-d`&, with the output going to a new logfile in the usual logs directory,
by default called &'debuglog'&.
-The filename can be adjusted with the &'tag'& option, which
-may access any variables already defined. The logging may be adjusted with
-the &'opts'& option, which takes the same values as the &`-d`& command-line
-option.
-Logging started this way may be stopped, and the file removed,
-with the &'kill'& option.
+
+.new
+Options are a slash-separated list.
+If an option takes an argument, the option name and argument are separated by
+an equals character.
+Several options are supported:
+.wen
+.display
+tag=<&'suffix'&> The filename can be adjusted with thise option.
+ The argument, which may access any variables already defined,
+ is appended to the default name.
+
+opts=<&'debug&~options'&> The argument specififes what is to be logged,
+ using the same values as the &`-d`& command-line option.
+
+stop Logging started with this control may be
+ stopped by using this option.
+
+kill Logging started with this control may be
+ stopped by using this option.
+ Additionally the debug file will be removed,
+ providing one means for speculative debug tracing.
+
+pretrigger=<&'size'&> This option specifies a memory buffuer to be used
+ for pre-trigger debug capture.
+ Debug lines are recorded in the buffer until
+ and if) a trigger occurs; at which time they are
+ dumped to the debug file. Newer lines displace the
+ oldest if the buffer is full. After a trigger,
+ immediate writes to file are done as normal.
+
+trigger=<&'reason'&> This option selects cause for the pretrigger buffer
+ see above) to be copied to file. A reason of $*now*
+ take effect immediately; one of &*paniclog*& triggers
+ on a write to the panic log.
+.endd
+
Some examples (which depend on variables that don't exist in all
contexts):
.code
control = debug/opts=+expand+acl
control = debug/tag=.$message_exim_id/opts=+expand
control = debug/kill
+ control = debug/opts=+all/pretrigger=1024/trigger=paniclog
+ control = debug/trigger=now
.endd
.code
exim_dumpdb /var/spool/exim retry
.endd
-Two lines of output are produced for each entry:
+For the retry database
+two lines of output are produced for each entry:
.code
T:mail.ref.example:192.168.242.242 146 77 Connection refused
31-Oct-1995 12:00:12 02-Nov-1995 12:21:39 02-Nov-1995 20:21:39 *
The name is placed in the variable &$event_name$& and the event action
expansion must check this, as it will be called for every possible event type.
+.new
The current list of events is:
.display
&`dane:fail after transport `& per connection
&`tcp:connect before transport `& per connection
&`tcp:close after transport `& per connection
&`tls:cert before both `& per certificate in verification chain
+&`tls:fail:connect after main `& per connection
&`smtp:connect after transport `& per connection
&`smtp:ehlo after transport `& per connection
.endd
+.wen
New event types may be added in future.
The event name is a colon-separated list, defining the type of
&`msg:rcpt:host:defer `& error string
&`msg:rcpt:defer `& error string
&`tls:cert `& verification chain depth
+&`tls:fail:connect `& error string
&`smtp:connect `& smtp banner
&`smtp:ehlo `& smtp ehlo response
.endd
git://git.exim.org / exim.git / blobdiff