sub triggerNotification {

  my ( $data ) = @_;

  my %message_classes = (
    'ARCHITECH' => 1,
    'CURR-LIB'  => 1,
    'MARKET_PL' => 1,
  );

  if ( not exists $message_classes{ $data } ) {

    #  Send an E-Mail notification if the message type is not listed.
  }
}