From the doc: 'intended for sending electronic mail utilizing mailing lists. It is a useful tool for anyone who needs to send information/notifications to a large number of recipients. This program allows you to create and manage mailing lists, and to generate personalized messages from predefined templates while sending. You can create separate mailling lists, which contain information about the recipients, the messages, and the SMTP servers. The interface of the program is very simple and easy to learn - nearly all functions can be performed using hotkeys on the keyboard.'
mailbomber.exe