ShareMail is a standards-based SMTP/POP3 mail server, which offers a full range of mail server functionality. And when combined with KasperSky AntiVirus, secures your system against email-borne viruses. Besides those standard functions, ShareMail has a unique feature, that is
Sharemail + one ISP mailbox = full email service and individual mailboxes for more than 100 users.

The license of this software is Free Trial Software, the price is $80.00, you can free download and get a free trial.