DNS query returns root servers

[BigHaig]

Running any DNS query agains ns.nease.net returns all the root servers.  Why 
is this?  I am trying to troubleshoot why clients from China cannot email us 
in the US.  Please explain if this is a DNS issue on their end.  Please see 
example below, it does this for all record types, not just MX.

Thanks.

> set type=mx
> unc.edu
Server:  ns.nease.net
Address:  202.106.185.75

(root)  nameserver = H.ROOT-SERVERS.NET
(root)  nameserver = I.ROOT-SERVERS.NET
(root)  nameserver = J.ROOT-SERVERS.NET
(root)  nameserver = K.ROOT-SERVERS.NET
(root)  nameserver = A.ROOT-SERVERS.NET
(root)  nameserver = B.ROOT-SERVERS.NET
(root)  nameserver = C.ROOT-SERVERS.NET
(root)  nameserver = D.ROOT-SERVERS.NET
(root)  nameserver = E.ROOT-SERVERS.NET
(root)  nameserver = F.ROOT-SERVERS.NET
(root)  nameserver = G.ROOT-SERVERS.NET
>