hmail.jitbit.com has no CNAME records.
Question and response
Question
dig hmail.jitbit.com. NS
Answer
The response has no answer records.
Authority
jitbit.com. 1206 SOA cody.ns.cloudflare.com. dns.cloudflare.com. 2396544300 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0