This has been driving nuts. The problem started with outlook express sending the same email over and over. When I try to delete either the in or out box it will not delete anything. I have contacted my ISP, all they say it not me!! I have looked at all me email setings and they all look right. I can use gmail however, not outlook express. This is the error I am getting. An unknown error has occurred. Subject '', Account: 'mail.charter.net ', Server: 'smtp.charter.net', Protocol: SMTP, Server Response: '550 5.2.0 you are not allowed to send mail to <[email protected]> E9210'