These are commonly called phishing emails. I have gotten several, all from companies & banks that I never have used or no longer use.
NEVER, EVER
click on a link from any email asking for your personal information. If you follow the instructions and give them your account number, password, pin number, etc, you will find your account wiped out within hours 
.
These should always be reported. Send a copy to the company that supposedly sent them to you (you should find an address on their real website) and also to abuse@uce.gov. This is the Federal agency that investigates these cases. Make sure you "show full headers" when forwarding these emails because the investigating company needs all of the information to try and trace them.
Others going around are scams to get money out of foreign countries, always millions, that they need a "legitimate" heir or contact in the US to accept for a large fee, and the international lottery that you have somehow won a portion of because your email was randomly picked out of the billions of emails they scanned the web to get and drew from. All of these are scams to get enough info on you to bleed you dry.
Just remember, if you don't enter you can't win, and if it sounds too good to be true, it is.
Kathy