smtp.xnet.uz has no MX records.
Question and response
Question
dig smtp.xnet.uz. MX
Answer
The response has no answer records.
Authority
xnet.uz. 3600 SOA ns1.sarkor.com. support.sarkor.com. 2023041801 1800 3600 3600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0