Modern spam protection services utilize a "one size fits all" technique. E-mails spam are ranked on the collective e-mail data of users e-mail accounts. In short, this is why they do not work. Anything that makes decisions for the general public based on a set of predefined rules is going to be circumvented by spammers and solicitors. The unique embedded InboxLock algorithm (or brain) learns on an individual level. It is an infant that only learns when you teach it the difference between right (don't block) and wrong (block). It learns on the fly and will remove or allow e-mails based on what you tell it to do.