h21.jp.			30 IN SOA h21.jp. postmaster.h21.jp. (
				1721709440 ; serial
				3600       ; refresh (1 hour)
				1800       ; retry (30 minutes)
				604800     ; expire (1 week)
				3600       ; minimum (1 hour)
				)

h21.jp.			30 IN TXT "v=spf1 mx ~all"

Name servers:
h21.jp.			30 IN NS dns02.muumuu-domain.com.
h21.jp.			30 IN NS dns01.muumuu-domain.com.