Hi Everyone
I'm trying to find some documentation re excahnge DNS settings.
To clarify my situation, my company Exchange server is server1.company.LAN it is on an internal IP range.
This server has a fully qualified domain name on the SMTP connector as server1.company.COM.
When you run an nslookup on the MX record for company.com it returns the proper external IP address and also the full DNS name server1.company.com
We also deal with mail for remote sites through this server, they generally use company.de. If you do an MX lookup on this address it returns mx0.company.de but points to my external IP address. I can confirm that i can send and receive mail for users in Germany ok through this server.
My ISP confirms that we have proper reverse DNS records in place.
Internally I have an MX record that points to server1.company.COM
I have just added the details company.com to the TCP/IP DNS settings on this server.
My concern is the overall configuration of the DNS for exchange, how to configure it for multiple domains, should the company AD domain be changed from company.LAN to company.COM to match these external MX records.
Exchange 2003 DNS Settings