I have an ISA server (SP1) with an Exchange server behind it. I used the Web Server Publishing to Publish the SMTP Service for the Exchange server and I suspect that's the root of my problem -- trying to install MailSweeper for SMTP and it wants to bind to port 25. Should I assume that "publishing" the port 25 like this binds the port? Any suggestion for how I might make port 25 available to a service on this local ISA machine; would I just "publish" it to the local IP address, perhaps? -Ben- Ben M. Schorr, MVP-Outlook, CNA, MCPx3 Director of Information Services Damon Key Leong Kupchak Hastert http://www.hawaiilawyer.com <http://www.hawaiilawyer.com>