mainns.eu has no MX records.
Question and response
Question
dig mainns.eu. MX
Answer
The response has no answer records.
Authority
mainns.eu. 300 SOA ns1.mainns.de. hostmaster.greenmark-it.de. 1768523727 14400 3600 604800 300
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0