mx.liftliger.com has no NS records.
NS records for this zone are defined at liftliger.com.
NS records for this zone are defined at liftliger.com.
Question and response
Question
dig mx.liftliger.com. NS
Answer
The response has no answer records.
Authority
liftliger.com. 3600 SOA dns.liftliger.com. hostmaster.liftliger.com. 1349115266 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0