yoonvalve.co.kr.	30 IN SOA yoonvalve.co.kr. postmaster.yoonvalve.co.kr. (
				20210730   ; serial
				10800      ; refresh (3 hours)
				3600       ; retry (1 hour)
				3600000    ; expire (5 weeks 6 days 16 hours)
				43200      ; minimum (12 hours)
				)

yoonvalve.co.kr.	30 IN TXT "v=spf1 ip4:211.34.104.37 ~all"

yoonvalve.co.kr.	30 IN A	183.111.161.157

Mail exchangers:
yoonvalve.co.kr.	30 IN MX 10 rmw-002.fmcity.com.

Name servers:
yoonvalve.co.kr.	30 IN NS ns.yoonvalve.co.kr.
yoonvalve.co.kr.	30 IN NS ns2.yoonvalve.co.kr.
yoonvalve.co.kr.	30 IN NS ns3.yoonvalve.co.kr.
yoonvalve.co.kr.	30 IN NS ns1.yoonvalve.co.kr.