cluster.2le.net has no MX records.
Question and response
Question
dig cluster.2le.net. MX
Answer
The response has no answer records.
Authority
2le.net. 300 SOA dns110.ovh.net. tech.ovh.net. 2026021305 86400 3600 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0