Hikvision DS-2CD2042WD-I WDR Intermittent email alerts

[CK IP Camera]

Hi, I have the above camera and the email alerts only seem to work when they feel like it. The Test email is fine and I get some alerts but nothing like the alerts I get when running iVMS 4500 (iPhone) and iVMS4200 Client software.
Does anyone have any ideas whats going on here? I've run Cat5 cables to the router as the pre-existing Powerline decided to stop working.
The sensitivity seems a bit off to. Ive tried fine tuning it but if you dont want loads of spurious alerts it can then miss things like a car coming on the drive!

 

[alastairstevenson]

As an off-the-wall suggestion, if the camera is using your LAN router/gateway for the DNS, try changing it to Google's 8.8.8.8 and see if that changes anything.