I have an edge server for external email to CAS. I want internal devices like printers or backup exec that send email alerts to use CAS as smtp server to avoid edge spam filtering. When I direct these devices to use the CAS - the emails never arrive. Do I need to configure some type of connector for these internal ip addresses that these devices/software reside on? It seems like I need a receive connector? Confused about how to configure smart host. So say the CAS is 10.1.5.5 and the device that sends email is 10.1.5.17. How exactly would I configure it to process emails from these devices? Thanks, John

CAS does not send or receives mail, hub server role does that.have a look at "Allowing application servers to relay off Exchange Server 2007" http://msexchangeteam.com/archive/2006/12/28/432013.aspx