[exim] exim debian, incoming mail gateway queue

    I have set up exim on Debian as my incoming mail gateway which
accepts email for my domains and forwards them to my Exchange server.
Everything is working great except for a large number of emails for
"other" domains in the queue.  Is there a way to drop mail that is not
addressed for my domains so it does not end up in the queue?  Also, is
there a way to ensure that NO mail is sent except to my domains?