On Friday, January 21, 2022 9:28:07 AM EST John R Levine wrote:
> >> For the same reason the PSL has a lot of two- and three-label domains.
> > 
> > Except that the PSL is somehow vetted; that is, there are no
> > self-appointed
> > PSDs.
> 
> Sorry, but that is simply false.  The entire "private domains" part of the
> PSD is self-appointed PSDs.
> 
> >> No, the org domain for c.example.com is example.com, while
> >> the org domain for a.b.example.com is b.example.com.
> > 
> > If we specify it that way, we need to warn users about the effects that
> > publishing a DMARC record involves.  Users of b.example.com need to know
> > that they cannot override the DMARC policy of their org domain unless
> > they want to become the org domain of the whole subtree.
> 
> Yes, that is the plan.  Please go back and look at the discussion when we
> talked about the tree walk in the first place.
> 
> >  That is, doing their own DKIM.
> 
> Sorry, that makes no sense.  Everyone always does their own DKIM.
> 
> >> In your model, when doing a tree walk from a.b.example.com, how do you
> >> know not to stop at b.example.com?  Do you always do five levels and use
> >> the one highest up the tree or what?
> > 
> > Personally, I'd consult the PSL if I find no role= tag.
> 
> Um, the whole point of the tree walk is so we do not use the PSL, which
> has all sorts of well known problems we've already discussed at length.

Yes.  Please.  We've already been through all this, let's not do it again.

Scott K



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