EXPLANATION This message should occur only on a down-level computer. Any action to correct the problem should be performed ...

EXPLANATION    This message should occur only on a down-level computer. Any action to correct the problem should be performed on that computer.  The message alias corresponding to your user name was not  deleted. Either your user name is the same as the computer name, or your user name is being used as a message alias on some other network computer.    ACTION    No action is needed.