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> On Jun 12, 2014, at 21:54, "Murray S. Kucherawy" <superu...@gmail.com> wrote:
> 
>> On Thu, Jun 12, 2014 at 12:33 PM, Elizabeth Zwicky <zwi...@yahoo-inc.com> 
>> wrote:
>> 
>> 
>> On 6/12/14, 9:36 AM, "Terry Zink" <tz...@exchange.microsoft.com> wrote:
>> 
>> >> Franck Martin wrote:
>> >>
>> >> I found that to build the override list for mailing list, I could log
>> >>DMARC rejected
>> >> emails that contained a List-Id or List-Post header. Once reviewing the
>> >>logs
>> >> (once a week, or once a month), you can make an easy decision if you
>> >>want to
>> >> add the found IPs into your override list.
> 
> The problem there is that not all lists use the List-* fields.

Well, if they don't use these headers, I don't think they would make any other 
modification for any upcoming scheme.

> 
> You also have a period of time between which a user wants to start using a 
> list and the whitelisting of the list (once a week, or once a month); in 
> between, you get the problem we have now.
> 
> It also presumes the list sends at least weekly or monthly; many don't.  (For 
> example, how many ietf.org lists exist but are largely dormant?)
> 
> -MSK
> 
Sure, this is a stop gap. A solution for today, useable today.

Better scalable solution seems to emerge...
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