The Spam Achilles Heel

The Achilles heel of the spammers is their message. They can circumvent any other barrier a spam blocker sets up. But they have to deliver their message, whatever it is. If we can write email spam filters that recognizes their messages, there is no way they can get around that. Think about how you delete spam from your mailbox. You look at the content for words and phrases or other things that don´t look right to you. That´s because your brain has its own "content-based filter". Content-based filtering systems used in connection with a sound statistical model are still one of the most effective ways to keep spam out of your mailbox.