sugarjung.co.kr.	30 IN SOA ns1.sdsns.com. nameserver.sds.co.kr. (
				2010072610 ; serial
				3600       ; refresh (1 hour)
				300        ; retry (5 minutes)
				604800     ; expire (1 week)
				3600       ; minimum (1 hour)
				)

sugarjung.co.kr.	30 IN TXT "v=spf1 include:_spf1.mailnara.co.kr
include:_spf2.mailnara.co.kr include:_spf3.mailnara.co.kr include:_spf4.mailnara.co.kr
~all"

Mail exchangers:
sugarjung.co.kr.	30 IN MX 10 mail.sugarjung.co.kr.

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