I have configured a POP3 Connector in my SBS Exchange server. I believe if have the SMTP working, I can send and receive locally, and I can send to an external email address and it be delivered. What I can't do is receive an email from an external address. I can watch the inbox of where my pop3 connecter is getting mail from and when I send the message I see it show up in the inbox for the email service. I can force the pop3 connector to retrieve email and immediately the message that was setting in the inbox is removed, leading me to believe the pop3 connector worked correctly and retrieve the email and delivered it to the exchange mailbox. However I cannot go to my outlook or owa client and retrieve the message, it is never delivered. Seems like it is setting in the exchange mailbox for that user but the client email never gets it. Any suggestions would be greatly appreciated.