SMTP relay/ Lotus Nts4.6/domino server

We are running Lotus Notes 4.6 on a Domino Server(I know, we’re in the process of converting to
Exchange 2000). Anyway, it is set up as an open
relay and I need to close it. Question is, does
anyone know how? I’m not familiar enough with Notesand the Help is anything BUT…

Thnx in advance for any light on this.
Lori David
FAST Software