Good news for spammers, the smart filtering software used to catch spam can be beaten.
With a little ingenuity it is possible to create messages that get past anti-spam filters every single time.
The discovery has been made by anti-spam researcher John Graham-Cumming who studies the novel ways spammers try to defeat the technologies used to stop junk mail.
The bad news for spammers is that this flaw in filtering systems is not easy to exploit and can be combated.
If you have an e-mail address you will know about spam and the longer you have had that address the more spam you will get. It is estimated that 60% of all messages sent are now spam.