hi there. a friend of mine is hosted by a pretty bad service provider and now they couldn't handle his email for more than a week, so I proposed to host his email till he sorts this problem out. what I did basically was change his DNS entries so that mail.quilombobrasil.com points to my IP and added an MX record for knightsenglish.com pointing towards mail.knightsenglish.com this works all eprfect his emails started coming onto my server, sending/receiving works perfectly. BUT now comes the problem. On his .asp website, done years ago by somebody who is no longer available, runs a newsletter whose settigns I can't figure out as I have no idea about ASP. whenever he sends out his newsletter, my server goes completely crazy and I get all these emails with the following content: email@example.com is the reply-to address and it exists. So what exactly is this error message telling me?