I have gotten several emails with subjects like 'E-card for you' and 'Someone sent you an E-Card!'
These are NOT real e-cards, but have faked links to load and execute a virus on your system!
Hopefully Antivirus sofware would catch them, but many times new viruses are not caught until the AV companies have updated their signature files to include the new viruses, and then it is too late.
Please remember to NEVER click on a link in an email - especially from an anonymous person sending you an E-CARD!