mail0.mydevil.net has no CNAME records.
Question and response
Question
dig mail0.mydevil.net. NS
Answer
The response has no answer records.
Authority
mydevil.net. 1154 SOA ns1.admin.net.pl. admin.admin.net.pl. 2025130283 10800 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0