>>489
# nmap 66-208-235-53.ubr01a.blumtn01.pa.hfc.comcastbusiness.net

Starting nmap V. 2.54BETA31 ( www.insecure.org/nmap/ )
Interesting ports on mail.padui.org (66.208.235.53):
(The 1541 ports scanned but not shown below are in state: closed)
Port State Service
22/tcp open ssh
23/tcp open telnet
25/tcp open smtp
81/tcp open hosts2-ns
110/tcp open pop-3
135/tcp filtered loc-srv
136/tcp filtered profile
137/tcp filtered netbios-ns
138/tcp filtered netbios-dgm
139/tcp filtered netbios-ssn
143/tcp open imap2
444/tcp open snpp
445/tcp filtered microsoft-ds

串なのですかねぇ。びみょー。