Seems like an Invalid Internet DNS name,
Contains invalid STD3 character [ @ ]

  
            _____
          _/_____\_
        _/         \_
       /  _\.   ./_  \
     <|   \__| |__/   |>
       \     / \     /
        \_         _/
          \  ___  /
          _\ \_/ /_
         /__\___/__\
        /IPDUHHHUDPI\