It’s estimated that over 97 per cent of all mail sent on the Internet is spam. The reason why you don’t see all of them is because email service providers are doing a pretty good job of filtering them out. Unlike spam filters from a decade ago, today’s anti-spam engines identify spam using multiple algorithms. For example once a spam sender’s computer is identified, it’s very easy for anti-spam engines to mark all mails originating from that computer to be spam. In some cases, the anti-spam engines identify the language spoken by a user and automatically mark emails in other languages as spam