smfl.init7.net has no MX records.
Question and response
Question
dig smfl.init7.net. MX
Answer
The response has no answer records.
Authority
smfl.init7.net. 3600 SOA ns1.init7.net. hostmaster.init7.net. 2022032802 3600 1800 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0