a couple of other responses discussed). We want to be able to take the same IP to a different machine, with a different name.
Then, clear and simple, you need to unregister/delete the current host at parent NSs, and register a new host. You will also have to modify ALL domains delegated to the current host so they are delegated to the new host (or wherever).
Let me ask this: when mail servers talk to each other, they give their names and that can (or will someday) be important. Does is matter if the DNS server's reported name
"reported" where? in the SMTP greeting? why are you mixing in MX algorithm and SMTP protocol with a glue record question? They are totally independent issues.
doesn't match the claimed (DNS A record) name?
which A record, in the parent's zone NS. You need to separate your thinking about how DNS works and how SMTP works. They are totally separate protocols.
Rather than use an alias
don't use CNAMES within 10 miles of NS or MX records.
There must be some standard way to do this.
standard tricks? nope
Otherwise, every time you replace your DNS server (with a machine with a new name), you'd have to reset all the registration records for any managed zones.
You've finally got the picture. Quit looking for DNS tricks to play with your host and domain registrations.
Len
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