Comment Re:My old Uni did this. (Score 1) 172
What you're saying only applies if the people communicating are not all sharing the same server.
As long as there is proper encryption between the clients and server, if you have members of a research group who all belong to the same organization (say, Uinv. of Hawaii) who need to exchange emails with (and only with) each other which contain confidential material, why on earth shouldn't they use a properly configured and managed server controlled by their organization?