ybj.jp.			30 IN SOA ybj.jp. postmaster.ybj.jp. (
				1666742604 ; serial
				3600       ; refresh (1 hour)
				1800       ; retry (30 minutes)
				604800     ; expire (1 week)
				3600       ; minimum (1 hour)
				)

Mail exchangers:
ybj.jp.			30 IN MX 1 ASPMX.L.GOOGLE.COM.
ybj.jp.			30 IN MX 10 ASPMX4.L.GOOGLE.COM.
ybj.jp.			30 IN MX 10 ASPMX2.L.GOOGLE.COM.
ybj.jp.			30 IN MX 10 ASPMX3.L.GOOGLE.COM.
ybj.jp.			30 IN MX 5 ALT1.ASPMX.L.GOOGLE.COM.
ybj.jp.			30 IN MX 10 ASPMX5.L.GOOGLE.COM.

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