0000.jp.		30 IN SOA dns.it-shizuoka.com. root.0000.jp. (
				601226     ; serial
				21600      ; refresh (6 hours)
				3600       ; retry (1 hour)
				691200     ; expire (1 week 1 day)
				600        ; minimum (10 minutes)
				)

0000.jp.		30 IN TXT "v=spf1 +ip4:210.168.234.208/28 +ip4:50.57.51.135
include:aspmx.googlemail.com ~all"

0000.jp.		30 IN A	50.57.51.135

Mail exchangers:
0000.jp.		30 IN MX 10 mail.0000.jp.

Name servers:
0000.jp.		30 IN NS dns.it-shizuoka.com.