Registro DMARC
v=DMARC1; p=quarantine; pct=5; rua=mailto:report@gumu.kr

Registro IPv4
host: hosinjung.synology.me
class: IN
ttl: 240
type: A
ip: 220.88.58.137

host: gumu.kr
class: IN
ttl: 600
type: CNAME
target: hosinjung.synology.me