Bad e-cards

Beware e-cards purporting to be from greetingcard.org - this is a reputable organisation but the supposed e-cards are malicious. Here's what greetingcard.org say:

The Greeting Card Association is an industry trade association. We do not publish cards, nor do we have an e-card pick up. If you receive an e-card notification from our association (www.greetingcard.org), it is fraudulent and should be deleted.
greetingcard.org/e-card scams

The email I've been sent contains an .exe file - open that one and your computer's not your own.