On Thu, Dec 30, 2010 at 12:42 AM, Ted Mittelstaedt <t...@ipinc.net> wrote:

> Thus, we can safely make the assumption that any mailserver is going
> to follow the model of a single host per /64.  Thus it will ALSO be
> just as useful for whitelists to have the same granularity - a /64 -
> as it would be for blacklists.

/64 as a default policy for a whitelist may make sense, but the
protocol *must* allow for different granularities as well -- both
higher and lower granularities for reasons outlined in another mail
(eg shared hosting environments).

> What this really calls for is a reworking of the SpamAssassin code.
> SA is going to have to start caching the results of any IPv6 DNS
> BL queries for a set period of time, probably 2 days.  Any IPv6

Cache should observe RRs TTL.

> address in a BL needs to invalidate all other IPv6 addresses in
> the /64 that the IPv6 address is in for 2 days.  There is no need to do
> further querying, nor is there a need for the scheme enumerated in
> the RFC draft.

Can you be really, absolutely sure that there will never, ever be a
need to report reputation on anything else than /64?

-- Matthias

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