# File lib/action_mailer/vendor/tmail-1.2.7/tmail/quoting.rb, line 68
    def original_filename(to_charset = 'utf-8')
      if quoted?(quoted_filename)
        Unquoter.unquote_and_convert_to(quoted_filename, to_charset).chomp
      else
        quoted_filename
      end
    end