Hashcash in Exim

Paul Schmidt <[email protected]> Thu, 06 Sep 2007 12:36:14 -0400
Newsgroups gmane.mail.spam.hashcash
Message-ID <[email protected]>
Is there a way to generate Hashcash in Exim in the background?  I want 
to do this for a single domain on our dedicated server, not all domains.