SPAMfighter SMTP Anti Spam Server, is the easy-to-use anti-spam solution for Microsoft Windows Servers. SPAMfighter SMTP Anti Spam Server is powered by the SPAMfighter Server, which is updated by the SPAMfighter community of millions of users across the globe. SPAMfighter SMTP Anti Spam Server delivers instant spam protection with no configuration or maintenance what so ever. As an email arrives and the SMTP Server routes it to its addressees, SPAMfighter constructs a unique signature for each message and sends it to the SPAMfighter Server for evaluation. If the SPAMfighter Server determines that a message to be spam, it is filtered before ever reaching the users inbox, and is instead moved to the user's spam folder.