Performing a basic port scan (nmap -F comverge.com)
Nmap scan report for comverge.com (66.209.86.6)
Host is up (0.0060s latency).
rDNS record for 66.209.86.6: smtp.comverge.com
All 100 scanned ports on comverge.com (66.209.86.6) are in ignored states.
Not shown: 98 filtered tcp ports (no-response), 2 filtered tcp ports (admin-prohibited)
Nmap done: 1 IP address (1 host up) scanned in 2.08 seconds