Hi, > > Eliot, > > I've no idea what characteristics of 'transactional mail' -- as compared > with... personal mail, or ? -- worth distinguishing. So while it's a > category that is often interesting to distinguish in email security and > abuse discussions, what do you have in mind here, exactly?
human to human versus other. > > MTA-to-MTA (or, rather, Boundary MTA to Boundary MTA) is almost > certainly an interesting distinction from author to recipient. For > example, that's why DKIM has succeeded at Internet scale, where PGP and > S/MIME have not. How blue sky do we want to be in this discussion? If the answer is "very", then we should even leave the above terminology aside – for the moment. But now that I see a large object headed straight toward me... > > But we need to be clear about what benefits it gets us and what it doesn't. Yes. > > If, for example, one is worried about their email operator being > compelled to produce keys for decrypting user mail... As a very important example. Eliot
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