mail.VLC.RU has no CNAME records.
Question and response
Question
dig mail.VLC.RU. NS
Answer
The response has no answer records.
Authority
vlc.ru. 60 SOA ns.vlc.ru. admin.vlc.ru. 2015033393 360 300 1800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0