yamagata1.net.		30 IN SOA ns1.value-domain.com. hostmaster.yamagata1.net. (
				2025051814 ; serial
				3600       ; refresh (1 hour)
				900        ; retry (15 minutes)
				604800     ; expire (1 week)
				120        ; minimum (2 minutes)
				)

yamagata1.net.		30 IN TXT "v=spf1 mx ~all"

Mail exchangers:
yamagata1.net.		30 IN MX 10 mail.yamagata1.net.

Name servers:
yamagata1.net.		30 IN NS ns2.value-domain.com.
yamagata1.net.		30 IN NS ns1.value-domain.com.