I recently upgraded to new hardware and OS from Windows 2000/Exchange 2000 to Windows 2003/Exchange 2003 - New server clean install. Email is working correctly without any problems. I have Outlook Web Access set up with a public IP address pointing to the internal server IP and port 443 open on the firewall. Web OUtlook was working correclty on Exchange 2000. I can access Webmail fine internally and can access it externally be using pub.lic.ip/exchange but not by using mail.domain.com/exchange. I have called my ISP and asked them to update the DNS to point to the new public IP of the exchange 2003 server and it still doesn't resolve mail.domain.com. Additionally pop3 is not working either ( I also have pop3 set up on firewall to point public ip to internal ip with approiate ports open)
My question is there anything I should be looking at to try and resolve this or is it something misconfigured at my ISP?