I have installed Exchange 2003 and need to now forward my MX record so that mail will arrive here. Here are my questions:
1. I have opened my firewall to allow for mail. When I change my MX record with my host provider, do I set it to forward to companyname.com or the external IP address of my router?
2. Once I have done this will immediately start to flow to Exchange or do I need to use NAT to tell the router to forward the mail to (ie: my local exchange ip)?
3. How long will it take for my external mail to begin to forward to our exchange server?