MailCOPA

MailCOPA, simply the best email software available. It is the most powerful out-of-the-box email software you can purchase to date. Not only is MailCOPA easy to use but it is pre-configured to aggressively combat SPAM and viruses and is fully multi-user and multi-machine capable allowing you to share email between users. In addition to being a great help to small and medium sized businesses, MailCOPA also has some great features for home users.

Limitations:

30-day trial