smtp.personifycloud.com has no CNAME records.
Question and response
Question
dig smtp.personifycloud.com. NS
Answer
The response has no answer records.
Authority
personifycloud.com. 900 SOA ns1-05.azure-dns.com. hostmaster.personifycorp.com. 2021020101 900 600 86400 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0