Re: IPv6 mail, was Let's try to be productive...

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In message <[email protected]>, Dave Crocker
<[email protected]> writes

>On 1/8/2014 8:20 AM, Richard Clayton wrote:
>> If IPv6 email really takes off (and that certainly won't be soon (IMO)
>> apart from some special cases), then we might very well see ISPs and/or
>> the really big mail handlers (Gmail, Yahoo &c) using one IPv6 address
>> per account ...
>>
>> ... this will allow people to block (or perhaps whitelist) specific
>> people who are using mass platforms without having to agonise over the
>> pain of blocking "the whole of gmail/whatever"
>

>They don't have to wait.
>
>They could sign with DKIM, using a different d= domain name for every 
>user.
>
>By way of an easy convention to extend d= granularity, they could 
>'encode' the author's full address into d=, such as:
>
>   <selector>._domainkey.<mailbox>._at.<domain>

given the number of mailboxes at the large providers, this will make the
task of DNSSEC signing the .com domain (a mere 113 million domains) look
somewhat trivial in comparison

>ps. No, this doesn't enable evaluation when the connection is first 
>attempted or opened.

assessing the load on DNS servers and contrasting that with the impact
of existing reputation systems would doubtless be instructive

- -- 
richard                                              Richard Clayton

They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety.         Benjamin Franklin

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