I got that one yesterday. I forwarded it to spoof@paypal.com and within minutes they got back to me and told me it was fake.
One way to tell if it's real, and I think I got this tip here, is they will use your real name they will never send an email saying dear paypal customer.They will use your full name not your email address.
I almost fell a couple of times. and did fall once filled out half the form but went and changed my info just in case.