zimbra.VPSVILLE.RU has no NS records.
NS records for this zone are defined at VPSVILLE.RU.
NS records for this zone are defined at VPSVILLE.RU.
Question and response
Question
dig zimbra.VPSVILLE.RU. NS
Answer
The response has no answer records.
Authority
VPSVILLE.RU. 3600 SOA ns1.VPSVILLE.RU. admin.VPSVILLE.RU. 2980448937 10800 900 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0