google postini incoming email
We have recently turned on postini filtering for google apps education, and we want to set it up so that a org unit of children can only send and recive emails from with in there school domain. So that they can only email teachers and students there as well as only recive from teachers and students.
There is an option for approved senders and blocked senders but after a test this dosnt work the way i expected.
In the approved senders I (can) put the school domain, ( expecting all other domains to be blocked) but i can still get emails from hotmail ect. The only way around it I can see is to all every other domain to the blocked list, which could be very time consuming. Am i missing somthing obviouse here??