A domain category that all need

[Nicola Piazzi]

It can be very useful a dns service URIBL that tell if a domain is public or 
private
If is private I can whitelist entire domain instead address by address when I 
receive an ham from one
For example :
I cannot WL gmail.com if I receive a ham from j...@gmail.com
But I can WL cocacola.com if I receive ham from s...@cocacola.com because only 
cocacola.com users can use cocacola.com domain 
Do you know something about it ?