mx-pool2.myfibermail.com has no NS records.
NS records for this zone are defined at myfibermail.com.
NS records for this zone are defined at myfibermail.com.
Question and response
Question
dig mx-pool2.myfibermail.com. NS
Answer
The response has no answer records.
Authority
myfibermail.com. 7200 SOA ns1.epbinternet.com. noc.epbinternet.com. 2023050405 10802 3600 604800 38400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0