Server rejected the sender's e-mail address Server Error 550 or 530

 

The message could not be sent because the server rejected the sender's e-mail
address. The sender's e-mail address was 'karlag@penpublishing.com'. Subject
'test error code', Account: 'pop.penpublishing.com', Server:
'smtp.penpublishing.com', Protocol: SMTP, Server Response: '530 user must authenticate on this
port', Port: 587, Secure(SSL): No, Server Error: 530, Error Number:

This error means that the email account setting are not configured for smtp authentication. You must check the box in your account settings.  Click here to for instructions.

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