GMail’s Spam Filter On Vacation?

"I've had to start writing my own Gmail SPAM filters today. I've received hundreds of SPAM with the phrase *MXON* in it. They are almost identical, except for the number of *'s. This seems to escape Gmail's SPAM filter and I've setup a rule to forward anything with that string to the Trash (you can't send it to the SPAM bin with a rule)." Source: webpronews.com