Chris Haynes wrote:
SPF should define (even at this late day) a new modifier for spf1: "pra"
with a single legal value "yes".
Instead of "pra=yes" I would add a scope modifier "sc=mfrom,pra" with
"sc=mfrom" as the default. The "sc" modifier may appear multiple times and
affects all terms except "all" on the right side in the same SPF record. The
"all" mechanism is independent of the scope.
For example if someone is doing SES, then the SPF record could be:
v=spf1 sc=mfrom,pra a mx sc=mfrom exists:%{l}._ses.example.com -all".
Roger