On Tue, Aug 18, 2015 at 4:22 PM, Jim Reid <j...@rfc1035.com> wrote: > > On 18 Aug 2015, at 22:06, Tom Browder <tom.brow...@gmail.com> wrote: > >> Okay, I assume then that this should be the only PTR record: >> >> 4.3.2.1.in-addr.arpa. IN PTR B.tld. > > Yes. Provided of course B.tld is The One True Hostname for your server.
It is! > BTW, you will get on a lot better if your postings used the actual > IP addresses and domain names rather than hide these behind > nonsense like B.tld and 1.2.3.4. Obscuring this information > helps nobody, especially yourself. Good point, but I'm not trying to obscure anything. I am using the "nonsense" names because I'm trying to emphasize the generality of the solution to a very common setup for many users. The chosen IP of 1.2.3.4 is easy to type and is easy to see when it's been reversed. If anyone is interested, my current IP address which I use for all my domains is 142.54.186.2 but I don't have a working mail server there yet (I'm in the process of transferring it from my old server and want to have a more robust setup than before--this is all prep work). Thanks for all the help, Jim. I'm sure I'll be back later for more help on tightening up my mail server's security. Best regards, -Tom
