Netwrix Anti Spam for Exchange is a freeware anti-spam solution for Microsoft Exchange Server or Microsoft Small Business Server (SBS). The product is very easy to install and run, works on the server, and doesn't require any client-side components. All incoming messages are checked for known spam criteria, such as Spam URL Realtime Block Lists (SURBL) and keyword filtering, and then suspected e-mails are delivered to user's Junk Email folder.
Looking for a Microsoft Exchange reporting solution?
If you need to track and report on all changes made to all Exchange Server configurations and permissions, Netwrix can meet your needs as well. Netwrix Auditor generates reports that show changes to configuration settings, creation and deletion of mailboxes, information stores, Exchange servers, connectors, protocol parameters, storage groups and many other types of objects and their permissions. These reports include who, what, when information, and "before" and "after" values for each modification.