Here's how to setup PowerMTA 4.5 in the easiest way can possibly be on the Internet, No coding or terminal experience needed, do it...
Servers Management
WordPress is a state-of-the-art semantic personal publishing platform with a focus on aesthetics, web standards, and usability.
Learn How to Setup PowerMTA in a CentOS 6.5 Using SSH
This is a Free Tutorial of How to Install PowerMTA in a Centos 6.5 Without Any Knowledge in System Administration, You Don't Have to be an Expert To do it.
Reda El Kasraoui