Nextras\MailPanel\FileMailer::send PHP Метод

    public function send(Message $message)
    {
        // get message with generated html instead of set FileTemplate etc
        $ref = new \ReflectionMethod('Nette\\Mail\\Message', 'build');
        $ref->setAccessible(TRUE);
        /** @var Message $builtMail */
        $builtMessage = $ref->invoke($message);
        $time = date('YmdHis');
        $hash = substr(md5($builtMessage->getHeader('Message-ID')), 0, 6);
        $path = "{$this->tempDir}/{$time}-{$hash}.mail";
        FileSystem::write($path, serialize($builtMessage));
        $this->files = NULL;
    }