MailMax 5.5 for Windows 2000/XP/NT4 is an award-winning, high performance, scalable email server that supports SMTP, IMAP4 and POP3 protocols. A multithreaded application, with multiple CPU support, MailMax 5.5, highly expandable, is driven by an industry standard Microsoft SQL 2000 database (bundled free with MailMax), and provides you with lightening speed, strong security and reliability.