I have a Watchguard III 700 firewall. This firewall is configured with a single computer as a DMZ server. This DMZ computer is used for SMTP virus scanning using McAfee Webshield. All email comes into the DMZ for scanning before being forwarded onto the Exchange server via Webshield DNS Lookup and Mail Relay. Works great. However, I am in the process of installing a new Exchange server. The new server has been configured for DNS and MS Exchange has been configured to relay the outgoing mail to the DMZ computer. Fully tested and all works fine. The new server has been added to the network infrastructure in the Watchguard firewall and also as a DNS server. The problem I have is that I am unable to "see" the new server from within Webshield via DNS or Mail Relay. There is an option to test the DNS server or Mail Relay from within the Webshield software and I'm not getting through. All I need to do is change the webshield software to the new settings and my new exchange server should be fully functional. Can anyone please provide any assistance with what else I need to configure in the firewall to enable the new server to be accessed. Thanks in Advance.