o4.email.snapengage.com has no CNAME records.
Question and response
Question
dig o4.email.snapengage.com. NS
Answer
The response has no answer records.
Authority
snapengage.com. 1800 SOA carl.ns.cloudflare.com. dns.cloudflare.com. 2398376224 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0