iam planing to implenent a exchange 2007 front end (edge) server into our current 2003single backend environment. What will happen to our POP3/SMTP users who are currently connecting directly to our backendsever via SMTPS POP3S? Is there a way to let them connect to the Front End (Edge 2007) and redirect em to the backend? How will the user authentication occur with a front end for pop3/smtp users. The mail flow from internal outlook/exchange and owa user makes sense, but how to handle external user who are using pop3/smtp?