xzit.edu.cn.		30 IN SOA dns1.xzit.edu.cn. root.xzit.edu.cn. (
				2411191610 ; serial
				3600       ; refresh (1 hour)
				1800       ; retry (30 minutes)
				604800     ; expire (1 week)
				3600       ; minimum (1 hour)
				)

xzit.edu.cn.		30 IN TXT "v=spf1 include:spf.mail.qq.com ~all"

Mail exchangers:
xzit.edu.cn.		30 IN MX 5 mxbiz1.qq.com.
xzit.edu.cn.		30 IN MX 10 mxbiz2.qq.com.

Name servers:
xzit.edu.cn.		30 IN NS dns1.xzit.edu.cn.