Daniel Feenberg <feenberg(_at_)nber(_dot_)org> wrote:
I predict that no significant amount of mail ever originates from
IPV6. Because it would be impossible to maintain a DNSBL for IPV6,
But a DNSWL would be just as easy as IPV4. So all it would take is
half a dozen of the largest senders and receivers (google, microsoft,
outblaze, aol, etc.) to use IPV6 among themselves and your statement
would already be wrong.
Then, if they set up a method to allow others to tentatively whitelist
IPV6 addresses, they could switch to more draconian blocking/checking
of IPV4 space over time.
Seth
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