SSP is one organization's attempt to tell another
what it should do with mail that is from a third
organization.
You left out an important part of what SSP should (in my opinion,
completely legitimately) try to do:
SSP is one organization's attempt to tell another what it
should do with mail that is from a third organization that
claims to be from the first organization.
Of course, SSP also includes guidance on unsigned messages.
eric
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