Unable to Send Email

Q:  I can receive email but I cannot send. I get this message "The message could not be sent because one of the recipients was rejected by the server. Server Response: '553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)'"

A:  First check your SMTP settings. Some Internet Service Providers require you to use their settings. If that's not the issue, then it's probably because you need to turn on the authentication for outgoing messages? This message is typical for when people try to use the SMTP server without the authentication.For help in setting up your authentication go to GO TO SMTP AUTHENTICATION.