mta-04.h4hosting.eu has no MX records.
Question and response
Question
dig mta-04.h4hosting.eu. MX
Answer
The response has no answer records.
Authority
h4hosting.eu. 3600 SOA ns1.h4hosting.eu. hostmaster.h4hosting.eu. 2025122301 3600 3600 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0