The delivery of a message failed because the message content was either missing or does not have the correct X.400 class. A non-delivery report is being sent to the message's originator.
The delivery of a message failed because it matched a "return to sender" rule on the recipient's inbox. A non-delivery report ...
The delivery of a message failed because messages are embedded too deeply within this message. The message has been deleted. ...
The delivery of a message failed because P1 address structure was incorrect. A non-delivery report is being sent to the message's ...
The delivery of a message failed because the addressing information for the recipient was incomplete. A non-delivery report ...
The delivery of a message failed because the message content was either missing or does not have the correct X.400 class. ...
The delivery of a message failed because the message envelope was missing. A non-delivery report is being sent to the message's ...
The delivery of a message failed because the message's content type was incorrect. A non-delivery report is being sent to ...
The delivery of a message failed because the recipient was invalid. A non-delivery report is being sent to the message's ...
The delivery of a message failed because the recipient's mailbox has recently been deleted. A non-delivery report is being ...