I guess I am asking for hints on how to set up DNS and forwarding. I have two main servers running DNS. Server 1 (Primary) uses Server 2 (Secondary) as its DNS and Secondary uses Primary for its DNS. And the whole domain uses Primary as it DNS to include Exchange 2003. I set up the following Forwarders on the Primary server..
Sometimes all mail flow will stop and we will get errors like " Relay access denied". I run a nslookup for a domain like www.google.com
and it fails. I will go into the DNS Server properties and move a different server to the top of the list, restart the DNS services and mail starts to flow. Round Robin is enabled, forward time out is 5. Shouldnt forwarding lookups go through all the servers I have listed before failing?