I am installing Exchange 2010 Enterprise into and environment that has Exchange 2003 already, the company is using the Forefront Product hosted by Microsoft -
Outbound mail is working well - any Mail trying to be delivered to an account on the new exchange 2010 server bounces with the error being a mail loop. The Loop servers are all servername.bigfish.com. No mail whether it is internal to the domain or send from and external account is delivered. All mail is directed to the Microsoft service first.
Looking from some guidance on how to configure Online forefront or the network or both to get this mail delivered.
at this moment, the default mail server in the location is the Exchange 2003 server for recieving mail.