> Is there a sufficiently useful degree of benefit to warrant the > (considerable) cost of development, deployment, and use?
What is this question in reference to? The notion of NXDOMAIN lookups or ADSP in general? > Is the benefit long-term? Assuming you're talking about ADSP in general, yes. Where-ever and when-ever it is used, DKIM+ADSP can permanently detect the unauthorized use of domain(s) in an email From: header, forever. The benefit is long-term. > A cousin domain is sufficiently trivial to use so as to make the intended > protection against use of sub-domains meaningless. That is just a restatement of the view which asserts that because ADSP can't protect domains you don't control you therefore needn't bother protecting those you do. > So the question is what sort of mechanism is going to benefit from locking > sub-domains, but not cousin domains? How is the benefit meaningful? I don't understand the question but I suspect it's a variant of what's already been asked and answered. Is there something new here? -- Arvel _______________________________________________ NOTE WELL: This list operates according to http://mipassoc.org/dkim/ietf-list-rules.html
