mail.hosting.st.uz has no MX records.
Question and response
Question
dig mail.hosting.st.uz. MX
Answer
The response has no answer records.
Authority
hosting.st.uz. 3600 SOA hosting.st.uz. admin.st.uz. 2018092610 3600 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0