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.
Hope you get it to work!