Mailtraq is the best value full-function professional email server
Mailtraq - the complete email server since 1997 - is the ideal Windows email server software. Mailtraq supports Outlook™ and all other standard email clients, such as Thunderbird, Evolution and Eudora. SMTP, POP3, IMAP all with TLS/SSL
Mailtraq Professional email server software is the affordable alternative to Microsoft Exchange Server. Mailtraq includes all the email services you need - plus Antispam, Anti-virus & Groupware.