Hi Tom and Jim, I have searched the entire Message Board and found no answer why the Message Screener does respond to the rules applied on the SMTP Filter on the ISA Server. I have followed your wonderful box... Chapter 9 pages 587 thru 594 to the "T". The design to implement ISA, Internal Mail Relay, and Exchange 2000 are exactly the same as the book describes. I have two inconsistencies on the instructions that did not work in my production environment. 1. On page 590, step 10, I had to select Allow incoming mail to be relayed to the domain checkbox to allow the mail to relay to the Exchange Server 2. On page 592, step 16, it was not clear weather to configure dcomcnfg.exe on the ISA or the Internal Mail Relay, so I configured for both. 3. On page 593, step 18, it was not clear under User custom configuration permissions radio button, what permission Everyone should have, by default it is Read. I'm at the end of my since Microsoft's Knowledge Base and Technet do not have any solutions. Thanks in advanced David Dellanno