smtp.scnresearch.com has no CNAME records.
Question and response
Question
dig smtp.scnresearch.com. NS
Answer
The response has no answer records.
Authority
scnresearch.com. 1506 SOA ns1.scnresearch.com. hostmaster.ns1.scnresearch.com. 2026030301 21600 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0