Modern anti-spam and E2E crypto

   - how does antispam currently work at large email providers
   - how would widespread E2E crypto affect this
   - what are the options for moving things to the client (and pros, cons)
   - is this feasible for email?
   - How do things change when moving from email to other sorts of
async messaging
   (e.g. text messaging) or new protocols - i.e. are there unique aspects
   of existing email protocols, or are these general problems?


more here..............https://moderncrypto.org/mail-archive/messaging/2014/000780.html