_spf.inetadmin.eu has no MX records.
Question and response
Question
dig _spf.inetadmin.eu. MX
Answer
The response has no answer records.
Authority
inetadmin.eu. 900 SOA ns.inetadmin.eu. root.inetadmin.eu. 1771542067 86400 900 1209600 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0