mail.dfalcon.top has no MX records.
Question and response
Question
dig mail.dfalcon.top. MX
Answer
The response has no answer records.
Authority
dfalcon.top. 60 SOA ns114.inhostedns.com. hostmaster.adm.tools. 2026011507 43200 7200 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0