On Wed, 18 Dec 2019, George Michaelson wrote:
IF we had implemented sender-pays, the SPAM problem would be radically
different. It would still be there, and the existence proof is SMS
spam.
I wrote a white paper on e-postage in 2004. Nothing has changed since
then other than that some of the numbers would have a few more zeros.
https://www.taugh.com/epostage.pdf
tl;dr:
Nobody knows how to run a payment system for billions of messages a day
Nobody knows how to pay for a payment system for billions of messages a day
Nobody knows how to manage a payment system for billions of messages a day
Typical problem: botnet takes over Grandma's computer and sends a spam
blast. Does she pay the postage? If not, who does? If the answer is
nobody does, how is that an e-postage system? Keep in mind that every
spammer in the world will claim to be a botted grandmother (many already do.)
R's,
John
PS: The current STIR/SHAKEN mess reminds us that settlements in the phone
system no longer work either.