E-cards have been a popular way of sending Christmas greetings, but they are not without their hazards for Windows users.
The most dangerous kind are the ones that just arrive in your inbox. Even if you scan attachments first, opening them is always a security risk. Malware authors have used what claim to be e-cards to circulate Trojans, like LoverSpy, or worms, like Atak.h, or porn advertising.
There are also the ones where you follow an email link to view a card on what is usually a reputable website. However, this also involves risk. First, there's the chance that the card is a phishing scam, designed to lure users to a fake version of the real site. Second, there's sometimes a security problem viewing real cards. If the card doesn't display properly, you may try turning off a pop-up blocker, disabling a firewall, or lowering your PC's defences in some other way to see the card. Will you remember to restore the settings later? Maybe not.
However, there's one phishing card I suggest you take a look at here....