mx.my-hosts.com has no NS records.
NS records for this zone are defined at my-hosts.com.
NS records for this zone are defined at my-hosts.com.
Question and response
Question
dig mx.my-hosts.com. NS
Answer
The response has no answer records.
Authority
my-hosts.com. 14400 SOA ns0.my-hosts.com. hostmaster.my-hosts.com. 2025020102 10800 3600 604801 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0