riok.net.		30 IN SOA ns1.value-domain.com. hostmaster.riok.net. (
				2025121915 ; serial
				3600       ; refresh (1 hour)
				900        ; retry (15 minutes)
				604800     ; expire (1 week)
				3600       ; minimum (1 hour)
				)

riok.net.		30 IN TXT "v=spf1 ip4:202.172.26.28 include:mxr.valueserver.jp ~all"

riok.net.		30 IN A	202.172.26.28

Mail exchangers:
riok.net.		30 IN MX 10 riok.net.

Name servers:
riok.net.		30 IN NS ns1.value-domain.com.
riok.net.		30 IN NS ns2.value-domain.com.