Correction: It wasn't exactly a blank e-mail. It had a 2 MB attachment. I don't know what it is because I'm not stupid enough to open unfamiliar files sent to me for no apparent reason.
PS: While cleaning the flood out of my inbox while watching out for any actual messages, I noticed that two of the inquiries about this message apparently came from a LOLcat and a profound cynic:
"Anybody has an answer??"
"I have no ideal."