Hashcash is one of the many anti-spam techniques used today, which is essentially a proof-of-work system designed to limit not only email spam but also denial-of-service attacks. A similar proof-of-work methodology is being used in bitcoin for block generation.

With an average of 150 billion e-mails sent out on a daily basis I cannot see how this could be deployed in the blockchain, which would then have to be adjusted to facilitate 1,7 million TPS while now it only serves 7 TPS (artificial limit).

Also, bitcoin is not really made for such small payments which would result in mounts of useless and undependable dust outputs.

Hashcash is one of the many anti-spam techniques used today, which is essentially a proof-of-work system designed to limit not only email spam but also denial-of-service attacks. A similar proof-of-work methodology is being used in bitcoin for block generation.

With an average of 150 billion e-mails sent out on a daily basis I cannot see how this could be deployed in the blockchain, which would then have to be adjusted to facilitate 1,7 million TPS while now it only serves 7 TPS (artificial limit).

Also, bitcoin is not really made for such small payments which would result in tons of useless and unspendable dust outputs.