Ignoring that Jim's response was a bit snarky, and also ignoring the
other responses you've already received, it's hard to answer your
question without knowing a bit more about what you're up to. However, in
general:
1. Anyone can put anything in a PTR record. There is no safe assumption
that the content is accurate.
2. In my experience (which is not thorough, but also not zero) anti-spam
folks are completely uninterested in what's in the PTR, and generally do
not do any blacklisting by domain name in the sense you seem to mean.
hth,
Doug
On 03/03/2014 09:26 AM, Stephen Malone wrote:
Hi Folks,
For PTR records out there that are pointing to domains other than those
that you control, I’m looking to understand common practice around their
setup. Two questions:
1.In general, can I trust PTR records? Is ownership of the target domain
validated at setup time by ISPs, and if yes, how is this done?
2.If ownership of PTR targets is not routinely validated, is there a
risk that the target domain could be blacklisted by anti-spam providers?
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