2009 Google Lottery - it's a scam

I received this email today about Google Lottery. I know this email scam for years and I wonder why it was able to pass through my Gmail anti-spam security. Here's the exact email message:
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Dear Sir/Madam,
Congratulations to you!! You have just been picked as one of our luckywinners of £850,000 British Pounds in our online promotions. For more info/ how to claim your winnings,contact the processing officer (Mr. Grahams Benfield) with the email addresses below by sending your winning numbers,full names, sex and location.


Mr. Grahams Benfield,
E-mail(s):benfieldgrahams@gmail.com, grahamsbenfield1@8u8.com.
Phone: +447024028674,+447023032874

This Lottery Promotion is totally free of charge!!
Wishing you good luck!!
Promo Coordinator.
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