smtp01.devprodqa.sabacloud.com has no CNAME records.
Question and response
Question
dig smtp01.devprodqa.sabacloud.com. NS
Answer
The response has no answer records.
Authority
devprodqa.sabacloud.com. 3378 SOA dns1.p01.nsone.net. hostmaster.nsone.net. 1734511284 43200 7200 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0