smtp3.experia.eu has no CNAME records.
Question and response
Question
dig smtp3.experia.eu. NS
Answer
The response has no answer records.
Authority
experia.eu. 3001 SOA ns1.experia.eu. root.experia.eu. 2026011553 7200 86400 3600000 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0