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Re: [ietf-822] WSJ/gmail/ML, was a permission to...

2014-05-04 10:30:21
On 5/4/2014 6:32 AM, Arnt Gulbrandsen wrote:
I may be stupid here, but why does dmarc even apply to messages with a
List-Id? Right now I can't think of any case where it makes sense to use
both List-Id and DMARC.


It's an appealing thought, but it seems to be a security holoe:

A spammer wishing to use a domain name covered by dmarc would merely
need to include a List-ID header field, to disable dmarc processing by a
receiver...

d/

-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net

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