John R Levine <jo...@taugh.com> wrote: > > > One possible way for DMARC to mitigate it would be to walk *down* instead > > of up, and (in the application, not relying on the recursive server) stop > > on NXDOMAIN because RFC 8020 tells you this is sensible, otherwise take > > the last result you find. > > I wouldn't want to skip the cache. In most settings there's a whole lot of > mail from the same place and most of the answers are likely to be cached. > Perhaps just note that if you're worried about this, use a cache the does RFC > 8020.
Ah oops, I was too terse: I meant, use the recursive server as usual, but don't assume it implements RFC 8020: instead (re-)do the NXDOMAIN logic in the application. Tony. -- f.anthony.n.finch <d...@dotat.at> http://dotat.at/ Trafalgar: In southeast, easterly 4 to 6. In northwest, southwesterly 5 to 7, becoming cyclonic 4 or 5 later. In southeast, moderate. in northwest, moderate becoming rough. In southeast, fair. In northwest, showers. Good. _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
