bx custom_mail()

<?

/**
 * Отправка писем системой, через внешний SMTP
 * Функция вызывается системой автоматически, при использовании CEvent::Send()
 * @param $to
 * @param $subject
 * @param $message
 * @param $additional_headers
 * @param $additional_parameters
 */
function custom_mail($to, $subject, $message, $additional_headers, $additional_parameters){

    require_once __DIR__ . '/vendor/PHPMailer/PHPMailerAutoload.php';
    $mail = new PHPMailer;
    $mail->isSMTP();
    $mail->CharSet  = 'UTF-8';
    $mail->setLanguage('ru');
    $mail->Host = 'server.ru';
    $mail->SMTPAuth = true;
    $mail->Username = 'user@server.ru';
    $mail->Password = 'pass';
    $mail->SMTPSecure = '';
    $mail->Port = 25;
    $mail->From = 'user@server.ru';
    $mail->FromName = 'My Name';

    $to = preg_replace('/\s+/', '', $to);
    $to = explode(',', $to);
    foreach ($to as $torecipient) {
        $mail->addAddress($torecipient);
    }

    $mail->isHTML(true);
    $mail->Subject = $subject;
    $mail->Body = $message;
    $mail->SMTPAutoTLS = false;

    $mail->SMTPDebug = 0;

    $arr = explode("\n", $additional_headers);
    if (is_array($arr)){
        foreach ($arr as $key => $value) {
            $arrr = explode(":", $value);
            $additional_headers = $mail->HeaderLine($arrr[0], $arrr[1]);

            if($arrr[0] == 'Content-Type') $mail->ContentType = $arrr[1];
            if($arrr[0] == 'BCC') {
                $arBCC = explode(",", $arrr[1]);
                foreach ($arBCC as $bccMail) {
                    $mail->addBCC($bccMail);
                }
            }
        }
    }

    if(!$mail->send()) {
        //echo 'Message could not be sent.';
        //echo 'Mailer Error: ' . $mail->ErrorInfo;
        return false;
    } else {
        //echo 'Message has been sent';
        return true;
    }

    return null;
}