On 11/23/20 12:09 PM, John R Levine wrote:
Since this is an experiment, do we have an idea of what the rest of
the problem is after the typical mailing list-like signature breakers
are excluded?
Sorry, this question makes no sense. The point of ARC is to deal with
the kind of breakage that mailing lists cause.
1) A mailing list creates an auth-res on the incoming mail to the list
2) It modified the message
3) It resigns the message with DKIM
4) It is then delivered to the subscriber's mail server
5) The destination mail server can look at the incoming message
including the mailing list's auth-res and decide whether to trust it or
not just like ARC.
It seems to me this covers the vast majority of cases. What are the
other cases where this is not sufficient and how significant are they in
reality?
Mike
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