case-study.biz.		30 IN SOA ns1.ix1000.com. hostmaster.case-study.biz. (
				2013092501 ; serial
				600        ; refresh (10 minutes)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				86400      ; minimum (1 day)
				)

case-study.biz.		30 IN TXT "v=spf1 a mx -all"

case-study.biz.		30 IN A	114.35.193.168

Mail exchangers:
case-study.biz.		30 IN MX 10 case-study.biz.

Name servers:
case-study.biz.		30 IN NS ns1.ix1000.com.
case-study.biz.		30 IN NS ns2.ix1000.com.
case-study.biz.		30 IN NS ns3.ix1000.com.
case-study.biz.		30 IN NS ns4.ix1000.com.