Like forwarding it to someone you don't like?!

Problem with an auto-responder is that they usually spoof the sender's address and have a separate email address in the body copy which you get to when you read the mail.

Best spam I'd ever seen was someone who claimed they'd been paid to kill someone and they could buy back their life! They claimed it was someone who knows the recipient well who had paid them for the job, but for more money they'd forget about it! I thought the direct approach was great! Needless to say they're still alive now and the spammer is no richer (well, not from us anyway).