two exchange servers, 1 new. I can send and receive to/from the internet from a user with a mailbox on the new system. I can send mail from a mailbox on the old ex2k mail server to a user with a mailbox on the new ex2k mail server. I can't send mail from the new ex2k mail server to mailboxes on the old ex2k mail server. error is "A configuration error in the e-mail system caused the message to bounce between two servers or to be forwarded to two recipients." any ideas... documentation and help you there is garbage for multiple exchange servers in the same site.