MDaemon Email Server for Windows

Trusted alternative to Microsoft Exchange, supports IMAP, SMTP, and POP3 protocols and deployed in over 90 different countries and in over 25 languages. MDaemon features integration with MS Outlook, multi-language webmail client, BlackBerry push email, mobile device support, mailing lists, content filtering, domain sharing, secure IM, email archiving, and remote admin. It includes built-in spam protection, email authentication and certification.