mail01.avoro.eu has no NS records.
NS records for this zone are defined at avoro.eu.
NS records for this zone are defined at avoro.eu.
Question and response
Question
dig mail01.avoro.eu. NS
Answer
The response has no answer records.
Authority
avoro.eu. 1800 SOA alaric.ns.cloudflare.com. dns.cloudflare.com. 2399964747 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0