Dave Crocker wrote:
DKIM is extremely helpful for this scenario because the negative
reputation that you have assigned to my identity (errr... domain)
can now be reliably and accurately applied.
You could not do that so safely in the past.
The threat analysis characterizes the bad acts as the spoofing of
email addresses.
I absolutely agree that DKIM is helpful in allowing you to reliably
apply a reputation that you maintain. This is discussed in the
second paragraph of section 1 of the threat analysis. I am simply
saying that DKIM doesn't say anything about how the reputation is
maintained and applied.
Different issue.
Yes I certainly agree with you statement about reputation.
In fact, I think DKIM documents should simply and directly say
something like: DKIM validates the use of an identity. A validated
identity has a number of uses, including as the referential basis for
developing a reputation information service. However identity
validation is merely input to the creation of such a service, rather
than having any reputation-related semantics of its own.
That is fairly close to the second paragraph of section 1, although your
version doesn't discuss locally maintained whitelists (arguably not a
reputation information service) nor accreditation services, both of
which also benefit from DKIM. My version doesn't re-emphasize that it
is input to such a service, as your last sentence does.
Well, maybe that wasn't as simple as it could be...
In any event, I was commenting on the cited statement, which the
threats document does focus on.
My point is that this obnoxious Dave Crocker that you do not want to
receive mail from qualifies as a Bad Actor, but no spoofing is involved.
True, but I have been saying that this is a class of Bad Actor that DKIM
does not address. I am beginning to see that it should say something
about supporting other mechanisms against these bad actors, even though
it doesn't itself solve the non-spoofing obnoxious sender (NSOS?) problem.
-Jim
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