mx.mymailwall.com has no NS records.
NS records for this zone are defined at mymailwall.com.
NS records for this zone are defined at mymailwall.com.
Question and response
Question
dig mx.mymailwall.com. NS
Answer
The response has no answer records.
Authority
mymailwall.com. 300 SOA ns3.domaindiscount24.net. tech.key-systems.net. 2025105833 10800 3600 604800 28800
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0