net4u.org.		30 IN SOA ns1.value-domain.com. hostmaster.net4u.org. (
				2021111010 ; serial
				3600       ; refresh (1 hour)
				900        ; retry (15 minutes)
				604800     ; expire (1 week)
				120        ; minimum (2 minutes)
				)

net4u.org.		30 IN TXT "v=spf1 include:_spf.google.com ~all"
net4u.org.		30 IN TXT "v=spf1 include:sv.net4u.jp ~all"
net4u.org.		30 IN TXT "v=spf1 mx ~all"
net4u.org.		30 IN TXT "v=spf1 include:sv2.net4u.jp ~all"

net4u.org.		30 IN A	162.43.112.7

Mail exchangers:
net4u.org.		30 IN MX 10 mail.net4u.org.

Name servers:
net4u.org.		30 IN NS ns1.value-domain.com.
net4u.org.		30 IN NS ns2.value-domain.com.