I'm getting this response when I send notifications, but never arrives.
HTTP/1.1 201 Notification sent
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Length: 35
Content-Type: application/json; charset=utf-8
Expires: Sun, 19 Nov 1978 05:00:00 GMT
Server: Microsoft-IIS/6.0
Set-Cookie: ...