$code = empty($res->userinfo['smtpcode']) ? -1 : $res->userinfo['smtpcode'];
if (!empty($res->code) && $res->code == 10001) {
// fake greylist if timed out.
$code = empty($res->userinfo['smtpcode']) ? -1 : $res->userinfo['smtpcode'];
if (!empty($res->code) && $res->code == 10001) {
// fake greylist if timed out.