Usually I don't send anything back -- but when I have, I've been able to just drop it in a blue mail box vs. going all the way down to the post office; very eas

Usually I don't send anything back -- but when I have, I've been able to just drop it in a blue mail box vs. going all the way down to the post office; very easy. I've seen people in my building just leave it down by the mailboxes for the carrier, but I have a blue box on my walk to work and drop it in there.