I can not find anything bound to port 25, but when i run nmap remotely on my server it returns the following:

new-host-4:~ cnolan$ nmap xxxxxx.com

Starting Nmap 5.51 ( http://nmap.org ) at 2011-03-21 21:17 EDT
Nmap scan report for xxxxxx.com (xx.xxx.xxx.xxx)
Host is up (0.021s latency).
rDNS record for xx.xxx.xxx.xxx: li125-xxxmembers.linode.com
Not shown: 998 closed ports
PORT STATE SERVICE
25/tcp filtered smtp
1300/tcp open h323hostcallsc



this is driving me crazy, i need to find it and shut it down
i run the following:
netstat -ltpn
(No info could be read for "-p": geteuid()=500 but you should be root.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 :::1300 :::* LISTEN -



thankyou for your help

A) "Filtered" is not a bad thing.

B) There is a good chance it is your ISP filtering port 25 - try it from somewhere else.