mx2.dreamhost.com has no NS records.
NS records for this zone are defined at dreamhost.com.
NS records for this zone are defined at dreamhost.com.
Question and response
Question
dig mx2.dreamhost.com. NS
Answer
The response has no answer records.
Authority
dreamhost.com. 300 SOA ns1.dreamhost.com. hostmaster.dreamhost.com. 2026022200 1460 1800 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0