I need to route a single user's mail internally only so that the individual cannot send/receive mail external to their domain. Any assistance is appreciated.

Version of Exchange? With Exchange 2007 and higher this is easily done with Transport rules. With Exchange 2003, a little more complex, but can be done. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.

Version of Exchange? With Exchange 2007 and higher this is easily done with Transport rules. With Exchange 2003, a little more complex, but can be done. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.

Exchange 2010. Thanks, I appreciate your help.

Create transport rule and use predicate "outside the organization" and drop the message. Restricting email to the Internet on a per user AND per domain basis http://blogs.technet.com/b/exchange/archive/2010/01/18/restricting-email-to-the-internet-on-a-per-user-and-per-domain-basis.aspxJames Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Create transport rule and use predicate "outside the organization" and drop the message. Restricting email to the Internet on a per user AND per domain basis http://blogs.technet.com/b/exchange/archive/2010/01/18/restricting-email-to-the-internet-on-a-per-user-and-per-domain-basis.aspxJames Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Yes, the transport rules let you apply messaging policies to e-mail messages that flow through the transport pipeline on Hub Transport and Edge Transport servers. And here is another post for reference. Hope helps.Noya Lau TechNet Community Support