> > [A DNS-based whitelist] does require u make a whitelist, ofc, but > > other than inputing it into DNS, doesn't require u do anything else > > with it, > >Inputting it into DNS is a *very* big deal, however. First, it's not >at all clear that it scales to precisely the sites I (at least) care >about most: the "> 1 million users" mailbox providers.
It's not a problem. Every large mail system* uses DNSBLs; they know how to deal with the scaling issues. The problems are figuring out what to put in the DNSBL and who maintains it. R's, John * - yes, really _______________________________________________ dmarc mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmarc
