Well, "letter-box" sounds maybe a bit extravagant, nevertheless it would be nice if you would send me a feedback to my homepage. I've prepared a form, that I only had to fill and send. On the other hand you can make an entry into my guestbook.
If the form doesn't work (no contact to the mail service or something like that), you can send me an "ordinary" mail to roy.meyfarth@myself.com.