1st SMTP Server - free SMTP relay server - Windows Freeware. 1st SMTP Server - a free SMTP relay server- is a simplest, easy to use SMTP mail relay server. It is used for relaying your email messages to its destinations quickly and easily.

Whenever you need to send large amounts of email from a mass mailing program like Advanced Emailer You can install several servers like this one on different computers to minimize the load and to increase the speed of sending.