NortonDNS: how do I report urls with wrong category or not being blocked?

I'm using NortonDNS with certain categories being blocked.  I occasionally run across sites are not categorized properly or are not blocked as I would expect them to be.  

 

Example: 4d.com is blocked as "personals," but it is actually database software.  I also have some proxy sites that are not categorized as proxies but should be.

 

How do I report these to you?  Most all similar products either have an email address or a url to submit these errors, but I can't find anything like that.

 

Thanks for your help.