ad-front.com.		30 IN SOA . hostmaster.nameserver. (
				7          ; serial
				21600      ; refresh (6 hours)
				1800       ; retry (30 minutes)
				604800     ; expire (1 week)
				5          ; minimum (5 seconds)
				)

ad-front.com.		30 IN TXT "v=spf1 include:spf.cn4e.com -all"

ad-front.com.		30 IN A	218.5.76.47

Mail exchangers:
ad-front.com.		30 IN MX 0 mx.ad-front.com.