A consent-enabled address will only accept messages from senders that
received a valid token for that address though some channel (usually,
not email).
It seems to me that if you want a private e-mail network, there are
plenty of ways to construct one now, e.g., use S/MIME and only accept
mail from senders whose signing keys are on your whitelist and encrypt
with your public key. Or use per-correspondent subaddresses, as
Zoemail has been doing for over a decade. If this were a problem that
needed to be solved, there are plenty of solutions already.
R's,
John
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