Securing SMTP
I have got my new server (RedHat 7.3, Cpanel/WHM) last week, and since then working on security issues. The idea is to make server secure before putting it live. The server will be used by myself, and it will not host any clients as I am not in a web hosting Business.
What I would like to do is to STOP SMTP so as no one including myself can use my server for sending out mails or SPAM.
However, if this is not possible, can I restrict the server to just accept outgoing emails from designated domains or myself only.
Looking forward for your replies and advices.
