Resolving inconsistent returns using recursor and public DNS

[sysiocn]

HI，Not familiar with recursor，Resolving inconsistent returns using recursor and public DNS。

pdns-recursor: powerdns/pdns-recursor-51:5.1.1

Close dnssec

[omoerbeek]

https://dnsviz.net/d/mcs-bd.feishu.cn/dnssec/ shows quite a few problems with mcs-bd.feishu.cn, some of the issues (for example missing AA bits in replies and parent is NXDOMAIN while there are child domain) can cause Recursor to fail.