Question : Basic Exchange 2007 Configuration Question

I have a real basic configuration.  Single forest, single domain, and 4 total servers currently.  1 2008 DC/GC/DNS/DHCP server, 1 2003 DC/GC/DNS/DHCP server, and 1 Exchange 2003 server.  We just purchased a new server for our exchange environment.  On the new server I installed Server 2008 x64 standard and went through the all the pre-req's for Exch07 and successfully installed  "Typical" Exch07 without error.  I purchased a new ssl cert and installed it successfully on my new Exch07 server and have been successful moving several test mailboxes from my Exch03 server to my Exch07 server, and mailboxes that have been moved to Exch07 can send mail to mailboxes still residing on my Exch03 server.  Everything is good so far.  At the end of all of this the existing Exch03 server will be uninstalled and the hardware will be ebay'ed.  We'll have just the single Exch 07 server.  I just want to be sure from here.  To enable mail flow to my new 07 server I just need to:

1. Add an authoritatitve domain (right now the default auth domain is xyzcorp.local) xyzcorp.biz as we're known to the rest of the world
2. Do I need to create a new send mail connector, and modify the existing receive mail connector?
3. On my sonicwall firewall to I just simply point incoming smtp traffic to the ip address of my new Exch07 server?

I think that's it.  Hopefully.  Thanks folks.

Answer : Basic Exchange 2007 Configuration Question

1) That is correct. You need to ensure that you add any domain names as authoritative so that the mail server will accept the mail.

2) You should really create a seperate Receive connector and create as an 'Internet' type connector where Anonymous users are able to send mail to it. You can create another Send connector that will be used to send all outbound mail if you wish, or amend the properties of the existing one if reqd.

3) You need to port forward 25 for mail. You will need 443 if you want OWA availability for users outside.

Shaun