Hi 2 u all Postfix is very new to me, I just heard that it is quite secure and this is the reason why I have chosen it. But that's not the problem anyway. Please tell me if postfix can do what I need it for: I have an internal network running on 10.0.0.0/24. I have an ipchains paket filter running on a suse 7.0 box, connecting my internal network to the outside. It is said that paketfilter are not as secure as proxies. At the moment I just have SSL, HTTP and FTP/FTP-DATA running over Squid. I need postfix (or some other mail proxy) also running on this box. This enables me to close DNS, SMTP and POP ports, disable routing and ipchains. The mailservers I receive mail from are outside my network (I have no DMZ running - not yet). I communicate through ipchains with my ISP's mail- and popservers. This means that postfix should act like a smtp and pop forwarder. Thank you Philipp Snizek