WHERE did this come from?

Attatched to this is, (I hope), the header text from a unsolicited e-mail message I received. The return address does not work. WHY? How can I inform the sender that I hope to never receive there material again? I tried "reply-all" through Eudora, but my reply got bounced back to me as undeliverable. I have removed the content of the original message. I don't know why it was sent to me, but it contained material that I found offensive. Any help, or words of wisdom and enlightenment would be appreciated. Information would be nice too. Thanks. -------------header should be below here-------------- i hope...--------