On Tue, Nov 23, 2021 at 05:52:00PM -0600, Aaron Poffenberger wrote: > 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]
My mistake, I was not familiar with reserved blocks other than RFC1918. That sort of sysadmin stuff hasn't been in my purview for about 15 years now... > Could also be I'm not clueless and made a real, informed effort. One need not be clueless to not know a critical piece of information. =8^) -- Derek D. Martin http://www.pizzashack.org/ GPG Key ID: 0xDFBEAD02 -=-=-=-=- This message is posted from an invalid address. Replying to it will result in undeliverable mail due to spam prevention. Sorry for the inconvenience.
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