Re: [ietf-dkim] Interesting Dupe Signatures

[Jim Fenton]

Barry Leiba wrote: But I have to consider customer sites patterns with heavy facebook users seeing tons of fb notifications and see if a simple check can add to the optimization. Mike has a point, but I agree that this would be a problem for large ISPs, where adding 10% more overhead for all Facebook messages would be something they'd want to avoid. But... I'd go a little further than this:  If you already have a valid signature from a given domain, why check any more signatures from that domain?  It doesn't tell you any more than you already know.  It doesn't matter if the signatures are identical or not. -Jim

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