Hi, I have been looking for a solution for days and nights and I can't find any solution to my problem. I have installed a Mail server behind a firewall , firewall I have configured very badly with iptables. I want an exterior smtp server to be able to speak with mine but it is failing. My configuration is: INTERNET---------------------------------FIREWALL-------------------------------MAIL SERVEUR ----------------------------------------------eth0-----------eth1-------------------------PrivateIP eht0 is the public interface with public adress A. How can I do this? Nandao nervous break down is close