szdns.cn.		30 IN SOA f1g1ns1.dnspod.net. freednsadmin.dnspod.com. (
				1482892192 ; serial
				3600       ; refresh (1 hour)
				180        ; retry (3 minutes)
				1209600    ; expire (2 weeks)
				180        ; minimum (3 minutes)
				)

szdns.cn.		30 IN TXT "v=spf1 include:spf.163.com ~all"

Mail exchangers:
szdns.cn.		30 IN MX 10 mx.ym.163.com.

Name servers:
szdns.cn.		30 IN NS f1g1ns1.dnspod.net.
szdns.cn.		30 IN NS f1g1ns2.dnspod.net.