On Nov 20, 2013, at 6:18 PM, John Levine <johnl(_at_)taugh(_dot_)com> wrote:
Yeah, AOL child mode, only accept mail from addresses in your address
book. It's been around for at least two decades.
That's not friending. That's whitelisting. And it works really badly,
because it's done ad hoc, not based on robust, cryptographically authenticated
identifiers.