Mailers for PhD programs?

<p>I've been curious as to the mail I've been getting for PhD programs. I'm guessing they got my address from ETS when I took my GREs but is that a reflection of the school knowing your scores and wanting you to apply there? Or is it just a mailer that they send hundreds of students looking to apply? </p>

<p>The one in particular that I'm most interested in was a typed letter from the dean of sciences and not a info packet. And its to a school I really want to go to.</p>