553 sorry, that domain isn’t in my list of allowed rcpthosts

The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'me@shahbazhk.com'. Subject 'testing email', Account: 'mail.ghazalz.com', Server: 'mail.ghazalz.com', Protocol: SMTP, Server Response: '553 sorry, that domain isn't in my list of allowed rcpthosts (#5.5.3 - chkuser)', Port: 25, Secure(SSL): No, Server Error: 553, Error Number: 0x800CCC79 The error is basically in Outlook, and... [ Continue reading... ]