Emailarchitect Email Server is a fast and full-featured email server running on Windows platform (supports x64 OS) supporting multiple domains, unlimited users, SMTP, POP3, IMAP4, SSL/TLS, HTTP protocols, DomainKeys and DKIM, comprehensive customized spam/virus filters (support regular expression) and realtime black list service which can block 99% unwanted mails, web administration & web mail (with rich text composer & message preview), multiple languages, RTL, global & private address books, message approval function, mailing list service and POP3 pull service. The built-in failsafe system incorporated with the server further enhances its stability and reliability to achieve zero down time. Free system tools such as "backup tool" and "scripting utilities" are provided to facilitate your mission-critical tasks like data backup and system migration. To further enhance the power against spam, EmailArchitect Software Development Kit (SDK) allows users to developer customized filter dll. This SDK can also facilitates developers to create modules to automate additional administrative tasks. New features: Internationalized domain name (IDN) is fully supported.