Email Formats

{
  "mx": [
    "8 mail2.njcb.com.cn.",
    "7 mail1.njcb.com.cn.",
    "5 mail.njcb.com.cn."
  ],
  "spf": [
    "v=spf1 ip4:221.226.46.160/27 ip4:58.240.77.160/28 ip4:222.190.247.0/24 ip4:153.3.162.0/24 ip4:36.152.55.0/24 -all"
  ]
}