Winner of a California Mega-Millions Lotto?

Today I received an email from the California Lottery, informing me that I won? Problem was, said payable lump sum will be coming from the Central Bank of West Africa? Although when I checked the lottery's home site, it said there that they indeed send out email messages to people chosen to receive a percentage of unclaimed winnings from both Mega-Millions and Super Lotto Plus. But then, isn't that too good to be true? I'm flabbergasted. I'm thinking that, since the money is in West Africa, there's got to be a mistake somewhere. It smells of a phishing scam. Any thoughts?