host7-22.dnns.net has no MX records.
Question and response
Question
dig host7-22.dnns.net. MX
Answer
The response has no answer records.
Authority
dnns.net. 14440 SOA ns1.dnns.net. ariel.dominet.net. 2025102800 1400 7200 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0