mail.akku.email has no NS records.
NS records for this zone are defined at akku.email.
NS records for this zone are defined at akku.email.
Question and response
Question
dig mail.akku.email. NS
Answer
The response has no answer records.
Authority
akku.email. 1800 SOA curt.ns.cloudflare.com. dns.cloudflare.com. 2398996855 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0