As some of you know, my new iPod isn't behaving itself, so I've been talking to the reseller I bought it from via email. I've been emailing him and he's been receiving the messages, then he replies and I receive them. No problems whatsoever. Today, I tried to reply to one of his messages, and I immediately got a server-generated bounce notification saying "host his mail server's DNS name [his mail server's IP]: 550 Rejected message because my mail server's IP is in a black list at bl.spamcop.net" Presumably he hasn't received my message. I of course haven't been spamming, so I don't see how this could've happened. So, I have two questions. 1. How could this have happened? 2. How can I fix it? Thanks.