Short description of SMTP Server Pro 5.18: SMTP Server Pro is a powerful easy-to-use SMTP POP3 mail server program designed for satisfying the requirements of huge organization in high-volume messaging. It is simple, light-weight and reliable; it has security features to prevent DDoS attacks and block SPAM. As a personal solution, it is ideal for laptop PC users who travel a lot and have to use different ISP on the run.