lu has no MX records.
Question and response
Question
dig lu. MX
Answer
The response has no answer records.
Authority
lu. 3600 SOA ns1.dns.lu. noc.restena.lu. 1771743673 3600 900 2592000 3600
Additional
. 0 OPT ; payload 1452, xrcode 0, version 0, flags 0