rdns1.airmob.eu has no MX records.
Question and response
Question
dig rdns1.airmob.eu. MX
Answer
The response has no answer records.
Authority
airmob.eu. 300 SOA dns100.ovh.net. tech.ovh.net. 2026021701 86400 3600 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0