ns1.combell.eu has no MX records.
Question and response
Question
dig ns1.combell.eu. MX
Answer
The response has no answer records.
Authority
combell.eu. 3600 SOA ns3.combell.net. hostmaster.combell.eu. 1669488864 10800 3600 604800 40000
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0