mail-in.axc.nl has no MX records.
Question and response
Question
dig mail-in.axc.nl. MX
Answer
The response has no answer records.
Authority
axc.nl. 3600 SOA ns3.cldin.eu. hostmaster.axc.nl. 1772333550 3600 900 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0