hunk.code_window:     :raises .UnexpectedUpdate:
       """
       try:
           return acme.register(messages.NewRegistration.from_data(email=config.email))
       except messages.Error, e:
           err = repr(e)
           if "MX record" in err or "Validation of contact mailto" in err:
               config.namespace.email = display_ops.get_email(more=True, invalid=True)
  
hunk.labels: keep keep keep keep keep replace keep keep keep
hunk.after_edit:     except messages.Error as e:
  
hunk.file_path: letsencrypt/client.py
hunk.type: replace