Hi, Is there a way (or program/script I can run) to verify that incoming messages come from valid email addys and bounce those that don't? I know that the from header can easily be forged but I at least want to verify that the forged header is a legit user name on that server. Just looking for another way to cut down on sp at m here. By the way, I run sendmail and procmail if that matters. Ben. _______________________________________________ TCLUG Mailing List - Minneapolis/St. Paul, Minnesota Help beta test TCLUG's potential new home: http://plone.mn-linux.org Got pictures for TCLUG? Beta test http://plone.mn-linux.org/gallery tclug-list at mn-linux.org https://mailman.real-time.com/mailman/listinfo/tclug-list