Hi All, I have a Windows server 2003 installed, infront of my mail server. The windows server is connected to internet and this is acting as relayhost to my Linux mail server. I enabled NAT on the windows firewall and forwarding pop3 and imap ports to Linux machine. But I am not able to access pop3 or imap from the internet. Do I need to add any commands to my iptables to accept the natted/forwarded packets? Thanks & Regards Ranjith Kumar.