VLADIVOSTOK.RU has no MX records.
Question and response
Question
dig VLADIVOSTOK.RU. MX
Answer
The response has no answer records.
Authority
vladivostok.ru. 3600 SOA ns.vlc.ru. admin.vlc.ru. 19 360 300 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0