John Said:

> I'm sure that Google has code somewhere that can validate ED25519
> signatures.  But that does not mean that it would be a good idea for them
> to use that code in production today and try to update their reputation
> systems to deal with the dual signing that implies.

With the number of messages already arriving with multiple DKIM signatures I 
can't imagine their reputation systems don't already handle dual signing just 
fine. Granted this would be two signatures on the same domain, but that seems 
that a small change from handling a signature on the From plus one from the ESP 
and maybe even one for the list-unsubscribe domain.

Mike
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