vmadmin@xstation:~$ netstat -a | grep smtp
tcp        0      0 *:smtp                  *:*                     LISTEN     
tcp       11      0 xstation:smtp           192.168.1.1:56690       CLOSE_WAIT 
tcp        1      0 xstation:smtp           192.168.1.1:1028        CLOSE_WAIT 
tcp        0      0 xstation:smtp           5351a3c5.cable.cas:3562 ESTABLISHED
unix  2      [ ACC ]     STREAM     LISTENING     8437     private/smtp
unix  2      [ ACC ]     STREAM     LISTENING     8489     private/bsmtp
vmadmin@xstation:~$ netstat -tld
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        0      0 *:vmware-authd          *:*                     LISTEN     
tcp        0      0 *:5901                  *:*                     LISTEN     
tcp        0      0 *:x11-1                 *:*                     LISTEN     
tcp        0      0 *:smtp                  *:*                     LISTEN     
tcp6       0      0 *:ssh                   *:*                     LISTEN