Good morning, I have two questions about the difference between Exchange 5.5 and Exchange 2003. 1. In 5.5 there is a setting in the IMC-properties which makes it possible to prevent relaying by adding ip-addresses which are allowed to send mail, so all other ip-addresses are not allowed to send mail, that's good. I wonder where the same setting is in Exchange 2003? 2. Also in the IMC-properties is a TAB about routing, that makes it possible to configure inbound mail or send mail to a subdomain in another environment. Where is the same in Exchange 2003? Or is it just handled by DNS? Thanks in advance. John