Email Formats

{
  "mx": [
    "10 mail.poongsan.co.kr.",
    "5 pscsn.poongsan.co.kr."
  ],
  "spf": [
    "v=spf1 ip4:210.123.28.251 ip4:210.123.28.252 ip4:14.63.169.103 ip4:203.251.178.34 ip4:203.251.178.35 ip4:211.171.250.161 -all"
  ]
}