mail.beta.uzsci.net has no MX records.
Question and response
Question
dig mail.beta.uzsci.net. MX
Answer
The response has no answer records.
Authority
beta.uzsci.net. 10800 SOA ns1.beta.uzsci.net. mskopytov.yandex.com. 2026021204 10800 3600 1209600 10800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0