I never open anything I'm not expecting in email, even if it comes under a name I know, and I assume most people don't, but according to Snopes, this latest virus is a real threat and ecards are one of those things you just might open, so for what it's worth beware of this.
A new virus has just been discovered that has been classified by Microsoft as the most destructive ever. This virus was discovered yesterday afternoon by McAfee . This virus simply destroys Sector Zero from the hard disk, where vital information for its functioning are stored.You can get a longer list of alternate labels at the link. Since it's real and it's current, clicker beware. Check the URL before you open a card.
This virus acts in the following manner: It sends itself automatically to all contacts on your list with the title: "A Card for You".
[h/t to Stania]