mail.sbaraildev.com has no CNAME records.
Question and response
Question
dig mail.sbaraildev.com. NS
Answer
The response has no answer records.
Authority
sbaraildev.com. 1342 SOA danica.ns.cloudflare.com. dns.cloudflare.com. 2395031679 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0