[Mimedefang] Reject Spam instead of tag it

[Sean Murphy]

I've installed Spam Assassin and MIMEDefang with Sendmail and everything 
is working well.  However I would like Spam Assassin to tell Sendmail to 
"Reject" Spam on the connection.  Instead of accepting the spam and 
marking it so users then can filter on the spam tag.  Can Anyone share 
in on how to tell MIMEDefang Filter to do this.

Thanks