Ebay 'MC015 Important Message from eBay Loss Prevention Department'. what to do?

Look at your My Ebay page. Legitimate email from ebay have your name on them and also show up in your "My Messages". If it shows up there, it's from ebay. If not, it isn't. You could also forward the email to spoof@ebay.com and they will let you know if the email is legitimate or a phishing scam.