Email Formats

{
  "mx": [
    "10 mx.usa.net.",
    "20 mx.ct.mbox.net."
  ],
  "spf": [
    "v=spf1 ip4:64.15.146.172 ip4:104.247.76.47 ip4:173.247.246.145 +a +mx +include:spf.usa.net -all"
  ]
}