[ietf-dkim] New issue: Upward query vs. wildcard publication

[John L]

>percentages are "normal" vs. "unusual", but my cursory look a
>long time ago suggested that it met the 80-20 rule.

You are certainly correct that most zones are pretty flat, but this
sounds like a DOS attack waiting to happen, send out junk with long
bogus addresses and watch the system on the other end chew up its
cache crawling up to the SOA.  That's why we arbitrarily limited the
walk in CSV to five levels.

R's,
John