dns3.mgnhost.com has no MX records.
Question and response
Question
dig dns3.mgnhost.com. MX
Answer
The response has no answer records.
Authority
dns3.mgnhost.com. 60 SOA mgnhost.com. support.mgnhost.com. 2022090520 3600 3600 604800 86400
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0