More information on MX records.Ĥ50 4.1.8 : Sender address rejected: Domain not found The recipient must create MX records at their DNS host so that they can receive email.

There are no MX records for the recipient’s domain If you do not see in the bounce message, the recipient’s provider might have blocked the message. Note: If Rackspace bounced your email message, the generating server should show in the bounce message. The bounce message should indicate what needs to change. This error does not mean you will never be able to send email again you must change some aspect of either the message or the method of delivery for email to successfully be delivered. The error can likely be resolved by sending the email again at a later time.ĥxx bounce - A 500 error indicates a permanent failure. If you do not see your particular bounce message here, refer to the mail provider for an interpretation of their message.Ĥxx bounce - A 400 error indicates a temporary failure, which means that a temporary condition has caused the email to not be delivered.

Bounce messages vary among mail providers. Bounce messagesīounce messages provide a brief explanation of why an email was not delivered. Prerequisiteįor more information on prerequisite terminology, see Cloud Office support terminology.įor a video tutorial see Email Help - Bounce Messages. This article explains the causes of common email bounce messages and how to resolve the underlying issue.

Email bounce back message no longer