voku / swiftmailer

     * @param string $header

     * @param bool   $is_sig

     */

    protected function _addHeader($header, $is_sig = false)

    {

        switch ($this->_headerCanon) {

            case 'relaxed':

                // Prepare Header and cascade

                $exploded = explode(':', $header, 2);

                $name = Swift::strtolowerWithStaticCache(trim($exploded[0]));

                $value = str_replace("\r\n", '', $exploded[1]);

                $value = preg_replace("/[ \t][ \t]+/", ' ', $value);

                $header = $name . ':' . trim($value) . ($is_sig ? '' : "\r\n");

            case 'simple':

                // Nothing to do

        }

        $this->_addToHeaderHash($header);

    }

    /**

     * @deprecated This method is currently useless in this class but it must be

    /**

     * @param string $header

     */

    protected function _addHeader($header)

    {

        switch ($this->_canon) {

            case 'nofws':

                // Prepare Header and cascade

                $exploded = explode(':', $header, 2);

                $name = Swift::strtolowerWithStaticCache(trim($exploded[0]));

                $value = str_replace("\r\n", '', $exploded[1]);

                $value = preg_replace("/[ \t][ \t]+/", ' ', $value);

                $header = $name . ':' . trim($value) . "\r\n";

            case 'simple':

                // Nothing to do

        }

        $this->_addToHash($header);

    }

    protected function _endOfHeaders()

    {