ntp.uzsci.net has no MX records.
Question and response
Question
dig ntp.uzsci.net. MX
Answer
The response has no answer records.
Authority
uzsci.net. 10800 SOA ns01.uzsci.net. root.ns01.uzsci.net. 2026021201 3600 600 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0