I am having trouble sending email threw my new Exchange 2007 server. I can receive emails threw Outlook 2003. Do I have to setup an external DNS settings like the old Exchange 2003. How do I set that up if I do and is there anything else I have to setup to get this working correctly? I did setup a new hub transport and added the domain name in there. Any help would be appreciated.

Hi, Checkthat you have configured Send Connector on Hub transport server correctly with Address Space * & external DNS lookup settings are correct and it resolves DNS lookup correctly. References: How to Configure Internet Mail Flow Directly Through a Hub Transport Server Configuring Exchange 2007 Hub Transport role to receive Internet mail Configuring Transport Server Properties