FIX DNS resolve Problems on PLESK Server

We have registered our own name servers with the provider, which run on 2 IP addresses ns1. ns2 on our server (PLESK). It has worked perfectly so far. Unfortunately, a freelancer has changed something and now no "new" domains or changes are accepted. New domains "cannot be resolved"

- Fix DNS problem on the PLESK server
- Make sure that the templates (DNS) are ok