bp.dotarai.com has no CNAME records.
Question and response
Question
dig bp.dotarai.com. NS
Answer
The response has no answer records.
Authority
dotarai.com. 1793 SOA ns.mail.in.th. hostmaster\.mail.in.th. 2026011331 86400 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0