Just make a cogent statement of the problems that DKIM is attempting to
solve that would not exist if DKIM did not exist.
There are two threat analyses possible:
Report = Threats (World)
Report = Threats (World + DKIM)
To get chartered the group needs to show
Threats (World + DKIM) < Threats (World)
If you take my advice on the charter this is much easier to do.
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