uir.cn.			30 IN SOA dns.uir.cn. mail.uir.cn. (
				879        ; serial
				28800      ; refresh (8 hours)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				1800       ; minimum (30 minutes)
				)

uir.cn.			30 IN TXT "v=spf1 include:spf.163.com -all"

Mail exchangers:
uir.cn.			30 IN MX 1 mx-gw.cacter.com.

Name servers:
uir.cn.			30 IN NS dns.uir.cn.
uir.cn.			30 IN NS dns2.uir.cn.