_spf.yinzcloud.net has no MX records.
Question and response
Question
dig _spf.yinzcloud.net. MX
Answer
The response has no answer records.
Authority
yinzcloud.net. 3600 SOA ORION.NS.NOVA53.net. SOA.NOVA53.net. 2026021423 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0