That's weird... I got mine! Maybe you should write to the admin over there, cause it could be broken!
I just thought of something else, the footers in the letter say they are on freeautobot for an auto-responder, which is kind of crummy, so maybe they are having trouble with it. Just a thought! Another things is, some auto responders don't like certain email accounts like juno or aol, or sometimes juno or aol (just for instance) don't let the letters come through.