_spf.oniaas.io has no MX records.
Question and response
Question
dig _spf.oniaas.io. MX
Answer
The response has no answer records.
Authority
oniaas.io. 3600 SOA ns1.oniaas.io. hostmaster.oniaas.io. 2026021601 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0