root@zimbra:~# netstat -atpn |grep smtp
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 2387/smtpd
tcp 0 0 10.10.9.2:46560 98.137.54.238:25 ESTABLISHED 27951/smtp
tcp 0 261360 10.10.9.2:39503 98.137.54.237:25 ESTABLISHED 27952/smtp
i think my isp is filtering the 25 tcp |