The company I support runs Exchange on SBS 2003. They receive mail through an external POP3 service that is collected with POP3 connectors. THey have various mobile devices (not Windows) that connect to the POP3 service to get a copy of received mail. The problem is that mail sent from one internal account to another never gets to the POP3 server and therefore is not seen on the mobile devices. I have tried making the Exchange server non-authoritative for the internal domain but Exchange still routes internally. Forwarding messages to contacts that use the mobile's provider address e.g. email@example.com isn't the solution because if a user replies to the forwarded message it shows as coming back from the mobile provider address rather than the POP3 domain account it was sent to. I am looking for a way to route internal mail, or at least a copy of it, to the POP3 server, or to the mobile provider address while preserving the original (POP3 domain name) reply to address.