I finally got my Linux mail server up and running (locally). I'm running RedHat 9 ~ Postfix ~ Courier Imap. Before I set it up with a public IP I want have the security settings correct. I have been using the 'Security' GUI in RH to configure the firewall settings. Any suggestions as to how I should set up my server before I place it on the outside?
Keep in mind that I am a Linux newbie and this is my first attempt to configuring an email box.