  MAIL invalid user specification? (USERSPEC) 
 The Question is:
 
What could be causing this error
%mail-e-userspec - invalid user specification
 
The user account works fine on other nodes,
you can send mail to it, etc.
 
 
 The Answer is:
 
  Check for a logical name that matches the specified username on
  the node where the failure occurs.
 
  --
 
 USERSPEC,  invalid user specification 'user-name'
 
  Facility:     MAIL, Mail Utility
 
  Explanation:  You specified an invalid user name when sending a mail message
                to a list of users.
 
  User Action:  Ensure that your list contains valid user names and retry the
                operation.
 
