not autoritative

[Cristiano]

I have error whith nslookup
server not autoritative
help me thank
> yyyy.it
Server:  dns2.xxxx.it
Address:  xxx.xxx.xxx.xxx

Non-authoritative answer:
irsap.it        nameserver = dns.xxxx.it
irsap.it        nameserver = dns2.xxxx.it
irsap.it        preference = 5, mail exchanger = mail.yyyy.it
irsap.it        preference = 10, mail exchanger = mail.xxxx.it

Authoritative answers can be found from:
irsap.it        nameserver = dns.xxxx.it
irsap.it        nameserver = dns2.xxxx.it
dns.xxxx.it       internet address = xxx.xxx.xxx.x
dns2.xxxx.it      internet address = xxx.xxx.xxx.x
mail.yyyy.it   internet address = yyy.y.yyy.yy
mail.xxxx.it      internet address = xxx.xxxx.xxx.x