[deltahawk5]

Originally Posted by kh99

This probably won't help a lot, but I think that error means that the server isn't listening on that port, or else possibly a firewall is blocking it. Are you sure you've got it listening on port 25?

Apparently Ubuntu is listening on port 25, but Postfix isn't. :\

root@dc02r01ds24:~# netstat -anltp | grep "LISTEN"
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      439/sshd
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      659/sendmail: MTA:
tcp        0      0 127.0.0.1:587           0.0.0.0:*               LISTEN      659/sendmail: MTA:
tcp6       0      0 :::22                   :::*                    LISTEN      439/sshd
tcp6       0      0 :::80                   :::*                    LISTEN      692/apache2