ns2.vdsina.ru has no MX records.
Question and response
Question
dig ns2.vdsina.ru. MX
Answer
The response has no answer records.
Authority
vdsina.ru. 600 SOA nserver1.vdsina.ru. info.vdsina.ru. 2013033676 10800 3600 172800 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0