I have installed Exchange 5.5 into a member server on Winnt 4.0 domain at work. I'd installed OWA into it and it is working fine internally. I tested the exchange server internally as well and every thing is working fine. I want to connect this exchange server to the Internet. I'd installed the IMS connector into it and configured it to use the DNS server option. Besides the MX and A record that needs to be created at the DNS server of my ISP, Do I need anything else to connect my Exchange server to the Internet? P.S.: Any suggestions will be accepted.