SendGrid not sending response to live URL
<p>We are using SendGrid Event Webhook notification to get the information about each delivered email. every time an email delivered to our customer we get notification via HTTP POST on our specific URL.</p>

<p>The URL can be  on either development server or live server.
we tested everything on development server and it worked perfect but when we put live URL on sendgrid-> mail setting -> Event Notification setting page it didn't work and we don't get any response. I searched everywhere and couldn't find the reason. here is the code which get the response from sendgrid. Can anyone tell me is there any confrontational issue or something else is needed. </p>

<pre><code>&lt;?php

$result=file_get_contents('php://input');
$response = json_decode($result,true);
</code></pre>

<p>?></p>