Hi Everyone, I added an ISA server to my network. I have exchange server in the private zone of my network. It seems that I can send emails exrernally from the exchange server no problems but I cannot received them. I think I opened up all the rules like POP3 rule and Mail server publishing in ISA 2004 but still I cannot receive emails sent to my exchange email account from external sources. Can anyone point me in the right direction im sure im just missins a small step here.