Many mail server administrator facing a lot of problems and struggling to fight a designed tool for performing various mail engineering attacks using PHP Apache and confuse on how to avoid email Spoof attempt, Phisher, Spammers and abuser came to theirs mail server.
So...
This tips and tricks topic will help/share you the solution, on how to manage mail server using cPanel/WHM to avoid Email spoofing, Phishers, Spammers and Abusers (Black List) that are not allowed to connect to the SMTP server and the connections will be dropped with a 550 error.
Jerry Salfian