We should stick stamps on emails just because it's cute.
Do we need more stamps when the attachments are larger? And/or is it more about the distance (hops) of travel?
The stamps on a received mail should get semi-transparant post marks for each hop from the respective server. Could be generated from the mail header info.
Can't wait for bouncing mails because there weren't enough stamps on it :D
@bleeptrack There was once an initiative called Hashcash that aimed to combat email spam using proof-of-work. Unfortunately, it never really caught on
@bleeptrack https://anubis.techaro.lol/ same concept, but more widespread in order to complicate web-crawlers' lives. Unfortunately, however, it does not (yet) support dynamic challenge/postmark sizes
Anubis: Web AI Firewall Utility | Anubis

Weigh the soul of incoming HTTP requests to protect your website!