mail.questionpro.in has no CNAME records.
Question and response
Question
dig mail.questionpro.in. NS
Answer
The response has no answer records.
Authority
questionpro.in. 1152 SOA greg.ns.cloudflare.com. dns.cloudflare.com. 2396197900 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0