spf-sfr-dmc.akio.com has no MX records.
Question and response
Question
dig spf-sfr-dmc.akio.com. MX
Answer
The response has no answer records.
Authority
akio.com. 300 SOA dns107.ovh.net. tech.ovh.net. 2026012300 86400 3600 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0