ns4.deep.eu has no MX records.
Question and response
Question
dig ns4.deep.eu. MX
Answer
The response has no answer records.
Authority
deep.eu. 600 SOA ns1.pt.lu. hostmaster.ns1.pt.lu. 2026022007 10800 3600 2419200 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0