Hi I did the OPS-Directorate review fordraft-ietf-uta-email-tls-certs-07 In general, I think this document is more or less ready to be published. I do believe that section 5 does touch on a number of operational aspects (and specifically about scaling). The title of that section however is: Compliance Checklist for Mail Service Providers and Certificate Signing Request generation tools So it may not immediately attract attention from operators so that they can see operational aspects. Maybe that could be pointed out somewhere in the document. Section 5 also states that this document and its predecessors "don't address scaling issues caused by use of TLS in multi-tenanted environments." And it states that further work is needed in that space. That is another operational aspect that may need to be pointed out specifically to operators. So maybe these 2 points can be highlighted in a saparate small sectoin titled "Operational Considerations". Just thinking aloud here. The point s have been made, but such a small section qould quickly point operators to the proper places for info. Nits: - Page 4: 5. Email protocols allow use of certain wilcards in identifiers s/wilcards/wildcards/ - page 5, 1st para section 4.1: email clients would be forced to manual confirm exception, because s/manual/manually/ ?? Bert