John Levine <johnl(_at_)taugh(_dot_)com> wrote:
Easy: as the end user, I _know_ which sites I _told_ to forward for
me.
Indeed, but explaning that to your spam button seems unlikely to be
something that a normal mail user could reasonably configure. One
could propose some auto-configure thing, but now we're back to how to
tell who's lying when they offer auto-configure stuff.
It shouldn't be that hard. I tell the server "I've configured
seth(_at_)otherdomain to forward to this account." The server sends a
magic message to seth(_at_)otherdomain; when it returns, the server can
observe the forwarding path and various header stuff, and configure
itself. The only user input is the answer to "What other email
addresses are yours that you've set to forward here?"
Seth
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