eagle-relay.mxlogin.com has no CNAME records.
Question and response
Question
dig eagle-relay.mxlogin.com. NS
Answer
The response has no answer records.
Authority
mxlogin.com. 3310 SOA pns21.cloudns.net. support.cloudns.net. 2026012601 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0