Originally Posted by matty
I think you have a problem with port 25 being blocked outbound.
edit: that's not to say you don't have a problem with spam/trojans, but I tried connecting to a bunch of servers at random from the logs you posted and had no trouble connecting to any of them.
I don't know, but I checked my firewall settings, the same settings was on the system, I have not done any adjustments on it, from the time I install the mail system. When I made an nmap from another server, it showed that port 25 is open.
Starting Nmap 4.62 ( http://nmap.org ) at 2010-07-27 13:26 PHT
Interesting ports on 18.104.22.168.BTI.NET.PH (22.214.171.124):
Not shown: 1707 closed ports
PORT STATE SERVICE
22/tcp open ssh
25/tcp open smtp
53/tcp open domain
80/tcp open http
110/tcp open pop3
143/tcp open imap
993/tcp open imaps
995/tcp open pop3s
On the URLs, yes, I can actually connect to them. But my concern is that why is it that my server seems to send so many emails to different addresses in just a matter of seconds. Is there a freeware tool to check if the system has indeed some sort of a malware?