On Sunday, May 4, 2014 5:29:49 PM CEST, Dave Crocker wrote:
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...
Yes.
If you do dmarc processing for ma message with list-id, you get ~100% false
positives. If you skip it, ~100% false negatives. Pick your poison. I have
my opinion as to which poison is better in this case.
Arnt
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