ns2.domaindiscount24.net has no MX records.
Question and response
Question
dig ns2.domaindiscount24.net. MX
Answer
The response has no answer records.
Authority
domaindiscount24.net. 300 SOA ns1.domaindiscount24.net. tech.key-systems.net. 2025030400 10800 3600 604800 28800
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0