nslookup명령으로 메일서버 정보를 확인할수 있습니다. c:\>nslookup Default Server: cns3.bora.netAddress: 203.248.252.2>set type=mx>ncpost.net Server: cns3.bora.netAddress: 203.248.252.2 c:\>nslookupDefault Server: dns.googleAddress: 8.8.8.8> set type=mx> ncpost.netServer: dns.googleAddress: 8.8.8.8Non-authoritative answer:ncpost.net MX preference = 1, mail exchanger = ASPMX.L.GOOGLE.COMncpost.net MX ..