relay.epriority.com has no CNAME records.
Question and response
Question
dig relay.epriority.com. NS
Answer
The response has no answer records.
Authority
epriority.com. 69 SOA inetdns1.ssnc.cloud. dns.cloudflare.com. 2397576068 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0