Comment by ghm2199

This would require an inversion of dynamics based on quantification and collective realization of a couple of things:

0. Emails suffer from a "misclassification" of intent issue on a time*attention scale. Imagine time of the day/week/year on one axis and their attention on email inbox on the other. Emails have to arrive at the right (x,y) point for a user to act on. But they rarely do.

1. Well being of a user is proportional to their current state of mind to receive an message from X. Which is proportional to how likely they are to listen what you have to say.

Both of these suggest a negotiation of messages between two parties, much like when a bartender asks you if you want a refill and you can say yes/no.