_spf.variomailprotection.net has no MX records.
Question and response
Question
dig _spf.variomailprotection.net. MX
Answer
The response has no answer records.
Authority
variomailprotection.net. 1800 SOA ns0.ambisys.jp. hostmaster.ambisys.com. 2025051501 10800 1800 3600000 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0