Hi, I'm getting the following error when trying to send email from outlook. A few hours ago it was working right but suddenly it stoped working. I can receive email to the account but I can't send any email.
The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'firstname.lastname@example.org'. Subject '', Account: 'mail.absolutemediaworks.com', Server: 'mail.absolutemediaworks.com', Protocol: SMTP, Server Response: '550 absolutemediaworks.com is listed in ():q', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79
Could anyone give me an idea what could be wrong?