Error: 553 sorry, that domain isn't in my allowed list of rcpthosts
Posted by Laura Schindler, Last modified by Laura Schindler on 23 November 2009 02:44 PM
After sending, or during sending an email, the email is returned or error produced with the message "Error: 553 sorry, that domain isn't in my allowed list of rcpthosts"

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.

Please follow the instructions in the Knowledgebase category "Setting up Email with different email clients" on how to set up your email client. For most clients, Sending Authentication is a checkbox labelled something like "My outgoing server requires authentication."
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