static.steadfastdns.net has no MX records.
Question and response
Question
dig static.steadfastdns.net. MX
Answer
The response has no answer records.
Authority
static.steadfastdns.net. 604800 SOA r0.steadfastdns.net. root.steadfast.net. 2022010300 14400 7200 3600000 604800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0