Re: [RETRANSMIT] Re: Radical Surgery proposal: stop doingreversefor IPv6.

[Kevin Darcy]

Jim Reid wrote:

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. 

Which is just another way of saying you're using it as a (very porous) 
form of spammer-versus-not-spammer authentication.

                                                                        
                                      - Kevin



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