Some history. SSP derived from DomainKeys policy. DomainKeys policy
derived from SPF as, at the time, there was some hope that SPF might
encompass DK-type systems so the syntax was made as compatible with
SPF as possible so it could just "slot in".
Given that the "slot in" to SPF hasn't occurred in two years and SSP is
likely to now expand in a dimension different from SPF, maybe now is a
good time to dispense with the syntactic and cryptic comparability
goal and do something that's a little more human friendly.
Mark.
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