Webroot Spam Shredder - Halt spam in its tracks! Webroot Spam Shredder filters undesired email advertising to save you time and hard drive resources. It auto-configures Outlook, Outlook Express, and Eudora accounts for immediate spam relief. The smart learning engine studies your decisions to keep or delete spam to more effectively sort future email. Whitelist and Blacklist features let you identify email that should be immediately delivered or instantly deleted.