This is probably also related to Exchange server that comes with Small Business Server 2003... I have a domain, "mydomain.com" set up for everyone's email here at the office. The problem is, everyone who uses the domain "mydomain.com" is not at the office... some users don't use this network. however, if I try sending an email to firstname.lastname@example.org it kicks back, because that user isn't on the network. Any idea what i did wrong?