Yahoo Lottery

My name is grace couch, I just received an email that says its from yahoo lottery, and that I won $250,000.00. I am sure this is a scam, but I

wanted to know if you new about it. It says its from Yahoo Lottery International, and it says they do this once a month, it also mentions msn, yahoo and more.

I just felt if this is a scam, you need to check into it. Please let me know.