Yeah I remember there were a couple companies which tried to make this a thing - you'd get e-mail addresses with them, and for every e-mail you'd receive, their servers would send an automatic reply asking for a small payment so that the e-mail gets delivered. Ultimately it didn't catch on. Neither did the efforts of Yahoo and a few partners in their consortium to impose their own anti-spam extensions of the SMTP protocol. The SMTP protocol at large continues to work on the same decades old foundation of blind trust, with some usable enhancements like SPF and DKIM but whose adoption is still insufficient.
A complete overhaul of the e-mail protocol has been needed for at least 20 years but so far it's been cheaper (and a very lucrative business for some) to simply mitigate in various ways. Not even IPv6 didn't get massive adoption, when CGNAT with IPv4 was an easier workaround to the lack of available IPs.
So I'm a bit pessimistic about this. Unless the status quo becomes an unbearable burden for the big players who might coordinate and push for a change, the decentralized nature of the internet will be hard to shift to a completely new operating model.
A complete overhaul of the e-mail protocol has been needed for at least 20 years but so far it's been cheaper (and a very lucrative business for some) to simply mitigate in various ways. Not even IPv6 didn't get massive adoption, when CGNAT with IPv4 was an easier workaround to the lack of available IPs.
So I'm a bit pessimistic about this. Unless the status quo becomes an unbearable burden for the big players who might coordinate and push for a change, the decentralized nature of the internet will be hard to shift to a completely new operating model.




