Hi All, I am slowly get there. I am testing MAILsweeper for SMTP. I have setup ISA to publish the MAILsweeper server and it receives mail without any problems. I want our outgoing mail to also pass through the MAILsweeper server. I have setup our mail server to relay to MAILsweeper. But what do I point MAILsweeper to? The ISA Server? If so do I have to open anything? Do I need the IIS SMTP server to be running to push the mail out? TIA Nathan Simpson