We have a spam filter (MS SMTP server + GFI) that filters spam and forwards on the mail to our Exchange Server, and the same set up for outbound mail. This works fine but the installation of a second Exchange Server hosting some Mailboxes with the same Email domains is unreachable. The error received when sending to Mailboxes on it both internally and externally is: "The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address." I can one think that it is related to either the Receipient Policy or Connector, or both. I have;nt managed to find any definitive articles on what configuration is needed to be done. Anyone have any suggestions? Thanks