Insufficient responses for TCP sequencing (2), OS detection may be less accurate
Interesting ports on notes5.senato.it (193.43.65.131):
(The 1537 ports scanned but not shown below are in state: filtered)
Port       State       Service
25/tcp     open        smtp                    
53/tcp     closed      domain                  
80/tcp     open        http                    
110/tcp    open        pop-3                   
1352/tcp   open        lotusnotes              

Remote OS guesses: NT Server 4.0 SP4-SP5 running Checkpoint Firewall-1, Windows NT4 / Win95 / Win98

# Nmap run completed at Thu Jul 12 02:55:20 2001 -- 1 IP address (1 host up) scanned in 581 seconds