spamai can be setup on a single computer with a single user (home edition) or a central computer for multiple users (business edition). the spamai server component runs under windows 2000, xp, and 2003 server. spamai works well with all pop3 clients such as outlook, outlook express, microsoft mail for vista, thunderbird, eudora, thebat!, courier, mozilla, pocomail, and other pop3 programs. spamai operates between the email program and server so that spamai can even support a mixed email client environment of several different users at the same time.