rootsoft.co.kr.		30 IN SOA ns1.sdsns.com. firechoi.sds.co.kr. (
				2016051300 ; serial
				3600       ; refresh (1 hour)
				300        ; retry (5 minutes)
				604800     ; expire (1 week)
				3600       ; minimum (1 hour)
				)

rootsoft.co.kr.		30 IN TXT "v=spf1 ip4:223.130.85.0/24 ~all"

rootsoft.co.kr.		30 IN A	220.75.215.60

Mail exchangers:
rootsoft.co.kr.		30 IN MX 0 mail.rootsoft.co.kr.

Name servers:
rootsoft.co.kr.		30 IN NS ns1.sdsns.com.
rootsoft.co.kr.		30 IN NS ns2.sdsns.com.