Dickens Scammers are now so sophisticated that it's increasingly difficult to determine whether an email or message is genuine. When in doubt, don't click on a link... well, I'm always in doubt now, so never click on any links! If you delete a genuine mail, you will always either get a 'phone call or a further communication. It's a flippin' hassle though.
We're quite careful, but we've been scammed several times, in several countries. With a credit card, main bank account, and just by a set of persons trolling the airport/misdirecting visa for the taxi. We've always received our money back from the bank/credit card, after a time.