Email Formats

{
  "mx": [
    "5 mx00.corp.3g.cn.",
    "10 mx01.corp.3g.cn."
  ],
  "spf": [
    "v=spf1 ipv4:120.78.214.19 ip4:61.145.124.133 ip4:61.145.124.14 ip4:122.13.144.43 ~all"
  ]
}