Hi this is the error message I get, I have taken out the email address here :
The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was( ) Subject 'Fw: ThePolarBear', Account: 'mail1.eircom.net', Server: 'mail1.eircom.net', Protocol: SMTP, Server Response: '451 http://www.spamhaus.org/query/bl?ip=109.79.32.49', Port: 25, Secure(SSL): No, Server Error: 451, Error Number: 0x800CCC79