mail.servihosting.com has no CNAME records.
Question and response
Question
dig mail.servihosting.com. NS
Answer
The response has no answer records.
Authority
servihosting.com. 9797 SOA ns1.servihosting.com. hostmaster.servihosting.com. 2023032801 3600 15 1209600 43200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0