SPAMfighter Exchange module (SEM), is the easy-to-use anti-spam solution for Microsoft Exchange Servers in small and medium-sized businesses. SEM is powered by the SPAMfighter Server, which is updated by the SPAMfighter community of more than 900,000 users from 203 countries/areas. SEM delivers instant spam protection with no configuration or maintenance, to help small and medium businesses that often operate with few or no IT staff. SEM seamlessly integrates with Microsoft Exchange Server, making the solution very fast. As email arrives and the Exchange Server routes it to its addressees, SEM constructs a unique signature for each message and sends it to the SPAMfighter Server for evaluation. If the SPAMfighter Server determines that a message is spam, it notifies SEM and the spam mail is moved to the user’s spam folder.