mx3.excellmedia.net has no CNAME records.
Question and response
Question
dig mx3.excellmedia.net. NS
Answer
The response has no answer records.
Authority
excellmedia.net. 935 SOA PDNS.EXCELLMEDIA.NET. hostmaster.EXCELLMEDIA.NET. 2026021972 10801 3600 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0