Mail Filter for ArGoSoft Mail Server Pro - Version 2.1a This Application expands the functionality of ArGoSoft Mail Server Pro (http://www.argosoft.com). It acts like a Server Extension plug-in and allows you to perform simple "actions" based on predefined "message rules" or "conditions".The goal of this application is to provide your users with a SPAM and virus free email environment as well as add other mail server enhancements.