[CakePHP2]2.2.xから2.3.5にバージョンアップしたらメールが文字化けした

	foreach ($rendered as $type => $content) {
		$rendered[$type] = $this->_wrap($content);
		$rendered[$type] = implode("\n", $rendered[$type]);
		$rendered[$type] = rtrim($rendered[$type], "\n");
	}

/**
 * Wrap the message to follow the RFC 2822 - 2.1.1
 *
 * @param string $message Message to wrap
 * @return array Wrapped message
 */
        protected function _wrap($message, $wrapLength = CakeEmail::LINE_LENGTH_MUST) {
                $message = str_replace(array("\r\n", "\r"), "\n", $message);
                $lines = explode("\n", $message);
                $formatted = array();
 
                foreach ($lines as $line) {
                        if (empty($line)) {
                                $formatted[] = '';
                                continue;
                        }
                        if (!preg_match('/\<[a-z]/i', $line)) {
                                $formatted = array_merge(
                                        $formatted,
                                        explode("\n", wordwrap($line, $wrapLength, "\n"))
                                );
                                continue;
                        }
 
                        $tagOpen = false;
                        $tmpLine = $tag = '';
                        $tmpLineLength = 0;
                        for ($i = 0, $count = strlen($line); $i < $count; $i++) {
                                $char = $line[$i];
                                if ($tagOpen) {
                                        $tag .= $char;
                                        if ($char === '>') {
                                                $tagLength = strlen($tag);
                                                if ($tagLength + $tmpLineLength < $wrapLength) {
                                                        $tmpLine .= $tag;
                                                        $tmpLineLength += $tagLength;
                                                } else {
                                                        if ($tmpLineLength > 0) {
                                                                $formatted[] = trim($tmpLine);
                                                                $tmpLine = '';
                                                                $tmpLineLength = 0;
                                                        }
                                                        if ($tagLength > $wrapLength) {
                                                                $formatted[] = $tag;
                                                        } else {
                                                                $tmpLine = $tag;
                                                                $tmpLineLength = $tagLength;
                                                        }
                                                }
                                                $tag = '';
                                                $tagOpen = false;
                                        }
                                        continue;
                                }
                                if ($char === '<') {
                                        $tagOpen = true;
                                        $tag = '<';
                                        continue;
                                }
                                if ($char === ' ' && $tmpLineLength >= $wrapLength) {
                                        $formatted[] = $tmpLine;
                                        $tmpLineLength = 0;
                                        continue;
                                }
                                $tmpLine .= $char;
                                $tmpLineLength++;
                                if ($tmpLineLength === $wrapLength) {
                                        $nextChar = $line[$i + 1];
                                        if ($nextChar === ' ' || $nextChar === '<') {
                                                $formatted[] = trim($tmpLine);
                                                $tmpLine = '';
                                                $tmpLineLength = 0;
                                                if ($nextChar === ' ') {
                                                        $i++;
                                                }
                                        } else {
                                                $lastSpace = strrpos($tmpLine, ' ');
                                                if ($lastSpace === false) {
                                                        continue;
                                                }
                                                $formatted[] = trim(substr($tmpLine, 0, $lastSpace));
                                                $tmpLine = substr($tmpLine, $lastSpace + 1);
 
                                                $tmpLineLength = strlen($tmpLine);
                                        }
                                }
                        }
                        if (!empty($tmpLine)) {
                                $formatted[] = $tmpLine;
                        }
                }
                $formatted[] = '';
                return $formatted;
        }