Hello,
On Tue, Apr 12, 2022 at 08:31:08AM +0100, Keith Williams wrote:
Here was the error message
host mx.lb.btinternet.com[213.120.69.89]
refused to talk to me: 421
re-prd-rgin-002.btmx-prd.synchronoss.net
Service
not available - no PTR record for 85.119.84.35
So pretty clear that they see no PTR record. The next step would be
to query the PTR record yourself, which is what I did in the earlier
email and that confirms there is a problem.
Here is the reverse zone file (
/var/lib/bind/35-32.84.119.85) for the IP
address
So by the file name ("35-32.84.119.85") you do perhaps believe that
you are serving the zone "35-32.84.119.85.in-addr.arpa", but by the
actual zone contents:
35.84.119.85.in-addr.arpa. IN SOA
ns2.keiths-place.co.uk.
[…]
$ORIGIN 35.84.119.85.in-addr.arpa.
… you are serving the zone "35.84.119.85.in-addr.arpa".
So all these entries:
… are for "35.84.119.85.in-addr.arpa" which is not the query that
arrives at your nameservers.
On the Panel web page for this:
https://panel.bitfolk.com/dns/
…when you select to have the reverse DNS for the single IP address
delegated to your nameservers, it does tell you on the page the name
of the zone that you should serve (plus example content):
https://ibb.co/bP5jP9p
If you (or anyone else) has any suggestions on how to make this
clearer please do let us know.
Alternatively if it is not straightforward, it may be best to just
directly set the reverse DNS of your single IP there in that
interface. You aren't really gaining much by having this delegated;
it's just one more thing to have to configure.
Cheers,
Andy
--
https://bitfolk.com/ -- No-nonsense VPS hosting