/* Функция копированая с форума битрикса. Можно причесать. Работа на будущее) */
function custom_mail($to, $subject, $message, $additional_headers, $additional_parameters) {
    require_once($_SERVER['DOCUMENT_ROOT'] . '/bitrix/php_interface/vendor/PHPMailer/PHPMailerAutoload.php');

    /* Парсинг дополнительных заголовков в письмах. */
    $additional_headers_array = explode("\n", $additional_headers);
    $arHeaders = array();

    foreach ($additional_headers_array as $key => $value) {
        $arTmp = explode(':', $value);
        $arHeaders[$arTmp[0]] = $arTmp[1];
    }

    $arHeaders['BCC'] = explode(',', trim($arHeaders['BCC']));
    unset($additional_headers_array);

    /* Настройки smtp */
    $smtp = array(
        'host'     => 'smtp.site.ru',
        'user'     => 'no-reply@site.ru',
        'password' => 'pa55wd',
        'from'     => 'no-reply@site.ru',
        'fromName' => 'M8TK'
    );


    $to = str_replace(' ','', $to);
    if (substr_count($message, "Content-Type: text/html")) {
        /* Отправка HTML письма. */
        $mail = new PHPMailer();
        $mail->IsSMTP();
        $mail->CharSet = 'UTF-8';
        $mail->Host = $smtp['host']; // SMTP server example
        $mail->SMTPDebug = 0; // enables SMTP debug information (for testing)
        $mail->Timeout  =   10;
        $mail->SMTPAuth = true; // enable SMTP authentication
        $mail->Port = 2525; // set the SMTP port for the GMAIL server
        $mail->Username = $smtp['user']; // SMTP account username example
        $mail->Password = $smtp['password']; // SMTP account password example
        $mail->From = $smtp['from'];
        $mail->FromName = $smtp['fromName'];

        $address = explode(',', $to);

        foreach ($address as $addr) {
            $mail->addAddress($addr);
        }

        foreach ($arHeaders['BCC'] as $bcc_email) {
            $mail->AddBCC(trim($bcc_email));
        }

        $mail->Subject = $subject;
        $mail->Encoding = '8bit';

        $bndr = substr(substr($message, 0, 25), -23); // А ВОТ ТУТ МУТИМ СВОЮ МАГИЮ!
        $mail->ContentType = 'multipart/mixed; boundary="' . $bndr . '"';
        $mail->Body = $message;

        if (!$mail->send()) {
            echo "Message could not be sent. <p>";
            echo "Mailer Error: " . $mail->ErrorInfo;
            return false;
            exit;
        }

        return true;

    } else {
        /* Отправка Plain Text письма. */
        $mail = new PHPMailer();
        $mail->IsSMTP();
        $mail->CharSet = 'UTF-8';
        $mail->Host = $smtp['host']; // SMTP server example
        $mail->SMTPDebug = 0; // enables SMTP debug information (for testing)
        $mail->Timeout  =   10;
        $mail->SMTPAuth = true; // enable SMTP authentication
        $mail->Port = 2525; // set the SMTP port for the GMAIL server
        $mail->Username = $smtp['user']; // SMTP account username example
        $mail->Password = $smtp['password']; // SMTP account password example
        $mail->From = $smtp['from'];
        $mail->FromName = $smtp['fromName'];

        $address = explode(',', $to);

        foreach ($address as $addr) {
            $mail->addAddress($addr);
        }

        foreach ($arHeaders['BCC'] as $bcc_email) {
            $mail->AddBCC(trim($bcc_email));
        }

        $mail->isHTML(true); // Set email format to HTML
        $mail->Subject = $subject;
        $mail->Body = $message;

        if (!$mail->send()) {
            echo "Message could not be sent. <p>";
            echo "Mailer Error: " . $mail->ErrorInfo;
            return false;
            exit;
        }

        return true;
    }

}