> Probably a better way to state it. Just trying to point out > that it is separate from the domain.
Well it could go either way. Per your suggestion, having the upstream "owner" serve the PTR record(s) may have the advantage of a large ISPs redundant connectivity and infrastructure reliability. Nice to see this topic. It's one that's often misunderstood in the world of DNS and is quite important to a mail infrastructure. ~JasonG -- ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~
