Email Formats

{
  "mx": [
    "50 mxctc-a.china-inv.cn.",
    "100 mxctc.china-inv.cn.",
    "100 mail.china-inv.cn.",
    "10 mxtele-a.china-inv.cn."
  ],
  "spf": [
    "v=spf1 ip4:123.127.138.0/24 ip4:124.127.97.0/25 ip4:114.255.166.0/24 ip4:60.247.126.64/26 ~all"
  ]
}