Re: [dmarc-ietf] finer grained org domain

[Tim Wicinski <[e-mail]>]

Speaking not as a chair...

I do think the tree walk deserves another look.   Years back when it was
brought up,
there was lots of talk of overloading resolvers. But as someone who spent
the past
several years looking at the DNS query data of good sized SaaS domains,
DMARC lookups
(or even DMARC NXDOMAINs) were on the low end of the spectrum.  Nowadays,
all web
properties point to CDNs, et al with 30 second TTLs.

tim


On Tue, Aug 18, 2020 at 12:39 PM John R Levine <[e-mail]> wrote:

> On Tue, 18 Aug 2020, Autumn Tyr-Salvia wrote:
> > * Departments sending transactional email - move them to dedicated
> subdomains (this is where really complex institutions would benefit from
> walking the domain tree instead of always inheriting from the org domain)
> >
> > Is inheritance walking the domain tree a topic that has already been
> discussed ad nauseam? This seems like an interesting point of discussion,
> but I also haven't been participating on this list for ten years and don't
> want to get into it if this is a topic everyone is tired of or that has no
> possibility of change.
>
> We've spun our wheels a lot trying to figure out a better way to find the
> organizational domain than for everyone to download the Mozilla PSL, but
> not about changing it to a tree walk.
>
> If we could come up with a better way for domains to publish their own
> boundaries (see https://github.com/jrlevine/bound) then that would be
> easy.
>
> Regards,
> John Levine, [e-mail], Taughannock Networks, Trumansburg NY
> Please consider the environment before reading this e-mail. https://jl.ly
>
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