I just got this:

Dear New York Times Reader,

You may have received an e-mail today from The New York Times with the subject line “Important information regarding your subscription."

This e-mail was sent by us in error. Please disregard the message. We apologize for any confusion this may have caused.

Sincerely,

The New York Times

I got one today as well. Thought it was strange since I have an account on the web site, but I'm not actually a subscriber. Good to know that it's a mistake and that I'm not using that account for anything important. Hope they weren't hacked though.