"Roy" == Roy Badami <roy(_at_)gnomon(_dot_)org(_dot_)uk> writes:
Roy> Let's get Sender ID out the door, and then we can think about
Roy> validating other identities. It would be relatively easy to
Roy> add other identities to Sender ID in a backward-compatible
Roy> way at a later date, particularly given the new versioning
Roy> mechanism.
Actually, the one change that might be worth considering for Sender ID
is to add an identity macro which always expands to the string
'pra'. This will make it less painful to produce backward compatible
extensions later. (Sorry, I know Unified SPF has something like this
but I can't remember what it's called.)
-roy