> On Mar 31, 2021, at 1:43 PM, Michael Wojcik <Michael.Wojcik@xxxxxxxxxxxxxx> wrote: > > As far as I can see, neither PKIX (RFC 5280) nor the CA/BF Baseline Requirements say anything about the practice, though I may have missed something. I had a vague memory that some standard or "best practice" guideline somewhere said the server should send the chain up to but not including the root, but I don't know what that might have been. Inclusion of the self-signed root is harmless. The only case that I know of where this is actually necessary is with DANE-TA(2) when the TLSA RRset has a hash of the trusted root cert or public key. -- Viktor.
