Starting Nmap 5.51 ( http://nmap.org ) at 2012-11-29 14:11 CET
Nmap scan report for warehouseutility.com (66.40.52.179)
Host is up (0.17s latency).
Not shown: 997 closed ports
PORT STATE SERVICE
80/tcp open http
111/tcp filtered rpcbind
2049/tcp filtered nfs
Either your domain isnt pointing to your mailserver, your iptables are blocking the ports or the mailsever is hosted on a different ip that you haven't mentioned yet.
