<?php 
$url_send_grid = config_load('url_send_grid');
        $params = array(
            'api_user' => config_load('send_grid_user'),
            'api_key' => config_load('send_grid_key'),
            'to' => $to,
 
            'subject' => $subject,
            'from' => $from,
 
            'html' => $message,
        );
$params['text'] = strip_tags($params['html']);
 $res = run_api($url_send_grid, $params);
        if (isset($res['message']) && $res['message'] == 'success') {
echo 'ok';
}else{

echo'not ok';
}