We currently have an Exchange 5.5 server running email. However we want to setup on Linux email server to hold a separte group of mailboxes which will be using only barebones mail. Both groups of users ideally will be using the same domain name ie user1@xdomain.com on Exchange and user2@xdomain.com on the Linux box. Is it possible to have both boxes setup with the same domain name. Any suggestion on how to do this will be greatly appreciated.