> nslookup -type=mx yahoo.co.jp Non-authoritative answer: yahoo.co.jp MX preference = 10, mail exchanger = mx1.mail.yahoo.co.jp yahoo.co.jp MX preference = 10, mail exchanger = mx2.mail.yahoo.co.jp yahoo.co.jp nameserver = ns10.yahoo.co.jp yahoo.co.jp nameserver = dnsg01.yahoo.co.jp mx1.mail.yahoo.co.jp internet address = 202.93.77.231