mail.lds2012.sci.uz has no MX records.
Question and response
Question
dig mail.lds2012.sci.uz. MX
Answer
The response has no answer records.
Authority
lds2012.sci.uz. 10800 SOA hosting.scinet.uz. davronaka.yahoo.com. 1770677039 10800 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0