pack.cn.		30 IN SOA . hostmaster.nameserver. (
				604        ; serial
				28800      ; refresh (8 hours)
				7200       ; retry (2 hours)
				604800     ; expire (1 week)
				5          ; minimum (5 seconds)
				)

pack.cn.		30 IN TXT "v=spf1 include:spf.mxhichina.com -all."

pack.cn.		30 IN A	121.196.202.111

Mail exchangers:
pack.cn.		30 IN MX 5 mxn.mxhichina.com.
pack.cn.		30 IN MX 10 mxw.mxhichina.com.