We run our own Email exchange box through our domain. Everything functions properly, we have no problems sending and receiving E-mails except when it comes to AOL and Netscape. When ever we send an outgoing message to an AOL or Netscape address we receive the following message. now I am new to dealing with exchange servers and it is my responsibility to handle it. I was wondering if it is something on our side or theirs? Some suggestions on how to troubleshoot this issue would be appreciated.