ns-us.wnet.pro has no MX records.
Question and response
Question
dig ns-us.wnet.pro. MX
Answer
The response has no answer records.
Authority
wnet.pro. 600 SOA ns-us.wnet.pro. hostmaster.wnet.ua.wnet.pro. 2025082502 600 600 2419200 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0