# File lib/action_mailer/vendor/tmail/quoting.rb, line 7
    def unquoted_body(to_charset = 'utf-8')
      from_charset = sub_header("content-type", "charset")
      case (content_transfer_encoding || "7bit").downcase
        when "quoted-printable"
          Unquoter.unquote_quoted_printable_and_convert_to(quoted_body,
            to_charset, from_charset)
        when "base64"
          Unquoter.unquote_base64_and_convert_to(quoted_body, to_charset,
            from_charset)
        when "7bit", "8bit"
          Unquoter.convert_to(quoted_body, to_charset, from_charset)
        when "binary"
          quoted_body
        else
          quoted_body
      end
    end