On 2021-11-23 17:28 -0600, Derek Martin wrote: > > My mail domain has had correct reverse DNS entries for ages. As soon > > as I received the error I verified it from multiple hosts to be sure. > > Well, the IP you gave for it does not resolve, as I already showed > you--not on my laptop at home, not on my work deskop, and not on my > hosted domain. So unless that IP was wrong/irrelevant, that doesn't > seem to be true. I can't speak to whatever testing you did but there > are potentially a number of reasons why you might get the answer you > expect while the rest of the internet doesn't.
That IP address purposely doesn't resolve. It's in the range reserved for documentation to parallel the uses of example.com in the narrative.[0][1] > seem to be true. I can't speak to whatever testing you did but there > are potentially a number of reasons why you might get the answer you > expect while the rest of the internet doesn't. Could also be I'm not clueless and made a real, informed effort. Cheers, --Aaron [0] https://datatracker.ietf.org/doc/html/rfc5735 [1] https://datatracker.ietf.org/doc/html/rfc2606
