Hi all, I have spent some time trying to configure this Content Filtering app on my ISA Win2003 Server. Finally success...I set up the smtp mail relay and then when it came to publishing my email server I did the normal thing of pointing to my int exch server ip. Good for exch not good for relay and gfi, it works now that I have published to the relay ip address on the isa private nic. The smtp virtual remote domain moves it to exchange and delivers internally. Thanks Peter