.cindex "environment"
If &%environment%& is given as an argument, the set of environment
-variables is output, line by line. Using the &%-n%& flag supresses the value of the
+variables is output, line by line. Using the &%-n%& flag suppresses the value of the
variables.
.cindex "options" "macro &-- extracting"
file that exists is used. Failure to open an existing file stops Exim from
proceeding any further along the list, and an error is generated.
-The file names need to be absolute names.
-
When this option is used by a caller other than root, and the list is different
from the compiled-in list, Exim gives up its root privilege immediately, and
runs with the real and effective uid and gid set to those of the caller.
Curve names of the form &'prime256v1'& are accepted.
For even more-recent library versions, names of the form &'P-512'&
are also accepted, plus the special value &'auto'&
-which tell the library to choose.
+which tells the library to choose.
If the option is set to an empty string, no EC curves will be enabled.
.section "Testing ACLs" "SECID188"
The &%-bh%& command line option provides a way of testing your ACL
configuration locally by running a fake SMTP session with which you interact.
-The host &'relay-test.mail-abuse.org'& provides a service for checking your
-relaying configuration (see section &<<SECTcheralcon>>& for more details).
-
.section "Specifying when ACLs are used" "SECID189"
An attempt to set this option for any recipient but the first
for a mail will be quietly ignored.
-If a recipient-verify callout connection is subsequently
+If a recipient-verify callout
+.new
+(with use_sender)
+.wen
+connection is subsequently
requested in the same ACL it is held open and used for
any subsequent recipients and the data,
otherwise one is made after the initial RCPT ACL completes.
You can check the relay characteristics of your configuration in the same way
that you can test any ACL behaviour for an incoming SMTP connection, by using
the &%-bh%& option to run a fake SMTP session with which you interact.
-
-For specifically testing for unwanted relaying, the host
-&'relay-test.mail-abuse.org'& provides a useful service. If you telnet to this
-host from the host on which Exim is running, using the normal telnet port, you
-will see a normal telnet connection message and then quite a long delay. Be
-patient. The remote host is making an SMTP connection back to your host, and
-trying a number of common probes to test for open relay vulnerability. The
-results of the tests will eventually appear on your terminal.
.ecindex IIDacl