The developer mailing list can digitally sign their messages with PGP, and all the recipients can add that PGP key to their whitelist. Whitelisted senders don't have to pay or do proof-of-work.
The developer mailing list can digitally sign their messages with PGP, and all the recipients can add that PGP key to their whitelist. Whitelisted senders don't have to pay or do proof-of-work.