Hope this helps... The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'enterpri@helta.dsvr.co.uk'. Subject 'Fw: test', Account: 'enterprise', Server: '212.19.67.118', Protocol: SMTP, Server Response: '550 relaying to <enterpri@helta.dsvr.co.uk> prohibited by administrator', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79