Have you tried to telnet (IP Address of mail server) 25. That will at least verify that Port 25 is open. MRL -----Original Message----- From: W. Colter Bowman [mailto:colter@xxxxxxxxxxxx] Sent: Tuesday, February 26, 2002 11:16 AM To: [ISAserver.org Discussion List] Subject: [isalist] The Hardest TIME with internal Exchange 2000 and ISA http://www.ISAserver.org Hello ALL, I have been having the worst time and luck when trying to finish the configuration of the exchange server behind ISA. Is it really this much of a pain. I have setup the appropriate filters using the mail wizard. I have the machine in the local network environment with a static NAT address of .30. The outside DNS servers are pointing to the ISA server while the inside DC has a .30 for the mail server. I can connect to the mail server fine, I can send using the mail server fine.....i just can't receive. When pinging from the outside I get a reply from the dns for the ISA server. When I go into the system manager to look in the mailboxes to see if the mail has made it, there is NOTHING. No mail makes it past the ISA server. I have installed the new patch on the ISA server with obviously no results. I have installed many Exchange servers inside other firewalls, Checkpoint or a Firebox and have not had this many issues. What could be the problem here. My Outlook Web Access is working fine but I cannot receive mail, only send.... I have read the LEARNING ZONE word for word, and obviously it has gotten me no where, does anyone else have a problem similar to this, if so........please help a tired engineer out... Thanks, Colter Bowman ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: Michael.Lippman@xxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')