SMTP instance '{3}' on server {2} is configured to route all messages via smart host '{1}'. Remove this option if this SMTP ...

SMTP instance '{3}' on server {2} is configured to route all messages via smart host '{1}'. Remove this option if this SMTP instance is set as the source or target transport server of a routing group connector between an Exchange Server 2007 routing group and an Exchange Server 2003 or Exchange 2000 Server routing group.