exch10smtp.agarik.com has no CNAME records.
Question and response
Question
dig exch10smtp.agarik.com. NS
Answer
The response has no answer records.
Authority
agarik.com. 3813 SOA ns2.agarik.com. dns-admin.agarik.com. 2025102202 3600 7200 172800 604800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0