Using MDEAMON with MN-500

Hi, I just setup my MN-500 on my network and I'm trying to configure a mail
server called 'MDEAMON'behind it. I've configured the firewall to redirect
pop, smtp, etc...to the server
computer running mdeamon via "Persistent Port Forwarding" but I cant seem to
send email from any account. Email is going into the mdeamon server but not
out...Any suggestions?

Thanks..

Kevin