So I've setup email@example.com to forward to their ISP email account. Messages are coming in that are spam, and are being redirected to firstname.lastname@example.org I then get a email@example.com email back XXX.XXX.XXX.XXX does not like recipient. Remote host said: 554 <firstname.lastname@example.org>: Sender address rejected: Domain not found. See http://www.url.com/spam-rejected.html Giving up on XXX.XXX.XXX.XXX. Perfect, the ISP rejects the spam, yet I wind up with a message still. Ideas? PS. the domain is in plesk setup with reject as the bounce for unknown users.