Ditto on all the carefulness, i had an email a while back that was supposed to be from Paypal, i didn't trust it because of the bad layout and it looked childish, so i signed into my account online to check for any changes or blocks in place and all was fine......message deleted.
If you do get a really dodgy looking email post a screenshot here and someone will give their opinion, though its usually easy to tell if they are fake.;)
Liam
