Internet scams - 1 million British Pound in Western Union for me?

When opening up my Gmail this evening I was shocked because I received a sum of money of £1,000,000.00 British Pound from Western Union, awaiting to be transferred into my account. As usual, I was highly skeptical, its a internet scam. How could such a big money like landed easily on my door? I have posted the screen shot in the image within this post (click for larger view). I remind you please be aware of any internet scams via email like this, they will give you free money in large sum for an exchange of your personal financial information (you bank account, personal password to verify it is truly your bank account) because they say wanna send you the money, that is their reason. The receiver (me) is not mentioned in the receiver email address, means spammers are using customized software to send similar email to million of internet user all over the world.