Un-Hacked

This morning I woke up to an odd email. It looked like it was from Yahoo with all of the usual disclaimers. It said "Are you trying to sign in"? Please use this verification code if it is you. It gave a 7 letter code. It said that someone from Vietnam tried to sign in at 7:48pm PST. There were 2 things wrong with this email. First, if I was having trouble signing in, how could I read this email? Second thing, I always read the header of where the email is sent from. This one was sent from "do not reply@cc-yahoo-inc. com. Obviously it was trying to be a Yahoo look alike address. I hit the delete button.