Scott Kitterman writes: > How many solutions do you think operators will be willing to > implement?
As many as have an expected benefit/cost ratio greater than 1, of course. If you want numbers, my expectation is about 0.5 (the odds are perceptibly better than even that *nothing* will be done), but I would hardly be surprised by 2 or more, since it seems likely that mailing lists and 3rd-party originated messages will require different solutions, and I think the operators would like to implement given a favorable benefit-cost ratio. > As I indicated in my utility assessment framework, I think we get a > maximum of one solution that requires cooperative implementations > in multiple parts of the originator/mediator/receiver trilogy. Hm. That's strange. They've already implemented SMTP, SPF, DKIM, and DMARC. By my count, that puts them a minimum of three solutions past what what you expect. > Given that, it had better be reasonably comprehensive. I expect that levine-dkim-conditional + "register addresses found in List-Post as candidates for delegation when an authenticated user posts" is as cheap as it's going to get, and will cover more than half of mailing lists. I think that's pretty comprehensive for a start, and thus something worth thinking about and looking for improvements, rather than rejecting because it won't eliminate world poverty in 30 days. _______________________________________________ dmarc mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmarc
