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After sending, or during sending an email, the email is returned or error produced with the message “Error: 553 sorry, that domain isn in my allowed list of rcpthosts” how do I fix this?

April 26, 2017allowed domain email Error message produced RETURNED sorry

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After sending, or during sending an email, the email is returned or error produced with the message “Error: 553 sorry, that domain isn in my allowed list of rcpthosts” how do I fix this?

1 Answer

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Posted

This error is caused by not ‘authenticating for sending’ with our mail servers. What that means is that your email client did not prove to the mail server that you are really you. We require authentication so that only our customers can send emails out using our mail servers. For most clients, Sending Authentication is a checkbox labelled something like “My outgoing server requires authentication.