On Monday, December 9, 2019 7:41:27 PM EST Brandon Long wrote: > On Mon, Dec 9, 2019 at 8:44 AM Dave Crocker <[email protected]> wrote: > > On 12/7/2019 12:11 PM, Scott Kitterman wrote: > > >> Remind me again the the additional work is that might be too much? > > >> Isn't it just another DNS lookup for the org domain -1... of which > > >> there are maybe a couple thousand and easily cacheable? > > >> > > >> This seems way less than say the additional work for ARC. > > > > > > It's slightly more. There's also a check to see if a LPSD (org -1) > > > is a PSD > DMARC participant. Exactly how to document that is the major > > > unresolved question that we should evaluate experimentally. It might > > > be one of three > > > > > things: > > First, this sort of exchange highlights the need for considering basic > > operational issues carefully and before publication. > > > > Second, it highlights the challenges of doing that in a way that isn't > > myopic. What is easy/cheap for highly motivated, expert, well-resourced > > participants might not be all that easy or cheap for the larger Internet > > community. (This is the operational side of scalability.) > > Ah, re-reading the spec, I'd guess we're talking about the scalability of > psddmarc.org.
It's only relevant for the purposes of the experiment. Part of coming to consensus on the longer term plan would be making sure we have a scalable approach for determining PSD DMARC participants. > [snip] > > > Also, any suggestion to rely on a published list ignores the history of > > problems with such lists, as well as at least requiring a careful > > specification for the list and a basis for believing it will be > > maintained well. > > I mean, the PSL is already a maintained object. Is this new detail > something > that has different ownership/privacy/etc concerns than the existing details? > > I'm sure I probably missed this, but couldn't we avoid this question by > just mandating > no reporting for non-existing organizational domains? Is that a > non-starter? It's one of the use cases we are trying to cover. I don't know if that makes it a non-starter. Scott K _______________________________________________ dmarc mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmarc
