emailserver3-38.serverpoint.com has no CNAME records.
Question and response
Question
dig emailserver3-38.serverpoint.com. NS
Answer
The response has no answer records.
Authority
serverpoint.com. 777 SOA ns1.serverpoint.com. dns.cloudflare.com. 2396157340 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0