Missing attachments for email notifications Hikvision DS-7716N-E4/16P

Hi I was wondering if anyone could shed some light on an issue I am having with the above NVR. I have managed to receive alert and event notifications over email such as motion detect etc. The problem I am having is I am not getting screenshots or attachments of the event. Under configuration > network >advanced settings I have selected attached image with interval 5 sec but I am not getting the attachment, just the notification.

I am accessing NVR over web interface and everything...

Missing attachments for email notifications Hikvision DS-7716N-E4/16P