mail2.spoje.net has no CNAME records.
Question and response
Question
dig mail2.spoje.net. NS
Answer
The response has no answer records.
Authority
spoje.net. 3600 SOA ns.spoje.net. tech.spoje.net. 1772128900 3600 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0