Still not working for me...
The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was '[email protected]'. Subject 'test', Account: 'mail.mydomain.com', Server: 'mail.mydomain.com', Protocol: SMTP, Server Response: '451 Dynamic/Residential IP range listed by NJABL dynablock - http://njabl.org/dynablock.html', Port: 25, Secure(SSL): No, Server Error: 451, Error Number: 0x800CCC79
The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was '[email protected]'. Subject 'test', Account: 'mail.mydomain.com', Server: 'mail.mydomain.com', Protocol: SMTP, Server Response: '451 Dynamic/Residential IP range listed by NJABL dynablock - http://njabl.org/dynablock.html', Port: 25, Secure(SSL): No, Server Error: 451, Error Number: 0x800CCC79