Re: [RETRANSMIT] Re: Radical Surgery proposal: stop doingreverse for IPv6.

[Jim Reid]

Reverse DNS does uses, even for IPv6. They are not necessarily
related to authentication. When reverse lookups of the hosts sending
me email don't work, this is almost always an indication of spam. It
would be nice to use this heuristic as the first line of defence
against spam in an IPv6 world.
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