SAP Message XS609 - Currently no delivery to &, as recipient cannot be reached

Diagnosis The message was processed correctly in the SAP system. However, asubsequent system reports that the recipient &V1& cannot be reached atthis time. Information from External System IF &V4& <> '' V4v3 ELSE Procedure If you try to resend the message at a later time, it is possible that itwill be delivered successfully.