4 ms·

This misconfiguration is indeed very common and sometimes it is hard to explain why this is a problem - 'it works for me' it is a common reply I'm getting when

• jethro_tell 5y ago
  As a matter of practice, before removing an authoritative name server, we would usually point it to another server. I.e. ns3 might now point to ns2 and we'd Leve that for a few days as not all caching is respected. After that you can remove the server and the name and if it's cached somewhere, it still points to a valid server.
• bradknowles 5y ago
  Thirty years ago, there was a script for processing and notifying domain owners regarding those lame delegations. It was called lamers.sh, and I took over maintenance of it from Paul Mockapetris. But then we started getting so much pushback from people who were getting the notifications that the script was allowed to go unmaintained, and the situation has only gotten worse since.