Anti Spam program eliminates unsolicited e-mails in your inbox. KnockKnock is a complete e-mail enhancement program and spam solution, and works with your current Email client. Easy to use administration features handles, multiple e-mail accounts on multiple servers. Works with virus protection software such as Norton and McAfee. KnockKnock learns what`s Spam from your normal activities. Free Lite version handles 1 Account.