I'm running SME Server 6 and using Outlook Express to check e-mail from my domain and when I try to send an outgoing e-mail I get the following error:
Server Response: '553 Sorry, that domain isn't in my list of allowed rcpthosts.', Port: 25, Secure(SSL): No, Server Error: 553, Error Number: 0x800CCC79
Does anyone know what this means or how I can go about fixing it?
Thanks