Hallmark e postcards

[BottomsUp]

I just received 3 e postcards from Hallmark (supposedly) with in an hour of each other. I'm very suspicious, since the attached file is 'postcard.zip'. I've heard of viruses arriving this way. I didn't open the zip file, and am very hesitant to. Nobody has ever sent me a postcard before, only bday, etc. It looks legit, but am very wary.
Anybody have similar experiences, or know anything about this?

 

[gramage]

I know the one time I attempted to open one at an internet cafe (not risking my computer) it was blocked as a known virus.

 

[crystalpalace]

Just mark them as spam. I've been getting one a day in one of my inboxes. It's so obvious it's a virus/worm/torjan by the way they made it in to .ZIP. Not that it would affect me anyways as I'm on OS X platform.

 

[BottomsUp]

Now I just got 3 more named Ikea.zip

 

[y2kmark]

What is the downside ...

of just immediately deleting anything you aren't 100% sure of? I honestly can't think of one.