level3.co.uk has no MX records.
Question and response
Question
dig level3.co.uk. MX
Answer
The response has no answer records.
Authority
level3.co.uk. 3600 SOA ns1.eu.level3.net. dns.level3.net. 2024062501 7200 600 2592000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0