_spf.easyserver.at has no MX records.
Question and response
Question
dig _spf.easyserver.at. MX
Answer
The response has no answer records.
Authority
easyserver.at. 10800 SOA ns1.easyserver.at. domainadmin.easyserver.at. 2026021108 10800 3600 2419200 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0