$to = $customerEmail;
        $from = config_item('email_from');
        $url = 'https://api.sendgrid.com/';
        $user = 'abhishekp';
        $pass = 'abhishekp@123';
        $params = array(
            'api_user' => $user,
            'api_key' => $pass,
            'to' => $to,
            'fromname' => 'DreamsOffers',
            'from' => $from,
            'subject' => $subject,
            'html' => $content);

        $request = $url . 'api/mail.send.json';
        // Generate curl request
        $session = curl_init($request);
        // Tell curl to use HTTP POST
        curl_setopt($session, CURLOPT_POST, true);
        // Tell curl that this is the body of the POST
        curl_setopt($session, CURLOPT_POSTFIELDS, $params);
        // Tell curl not to return headers, but do return the response
        curl_setopt($session, CURLOPT_HEADER, false);
        // Tell PHP not to use SSLv3 (instead opting for TLS)
        //curl_setopt($session, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);
        curl_setopt($session, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($session, CURLOPT_RETURNTRANSFER, true);

        // obtain response
        $response = curl_exec($session);
        curl_close($session);