ns-2.telemach.net has no MX records.
Question and response
Question
dig ns-2.telemach.net. MX
Answer
The response has no answer records.
Authority
telemach.net. 43200 SOA ns.telemach.net. hostmaster.telemach.net. 2020092905 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0