DKIM-Signature Header tags
x: Signature expiration
l: Body length count
Removal of these would be a show stopper for me. In fact, overall,
anything that is SECURITY related should be protected from removal
proposal.
Do you mean anything that is security related or do you mean any thing
that improves security? You're not being very precise.
As I understand it l: reduces security because it introduces wiggle-
room and x: seems only to offer theoretical benefits that are far more
concretely established via key revocation in the DNS.
Furthermore, x: is largely meaningless if you accept that DKIM is a
temporal authentication mechanism, which it has always intended to be.
Mark.
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