Email Formats

{
  "mx": [
    "10 mx.usa.net.",
    "20 mx.ct.mbox.net."
  ],
  "spf": [
    "v=spf1 mx ip4:12.217.157.107 include:mktomail.com include:spf.mandrillapp.com include:spf.usa.net include:spf.cashedge.com ~all"
  ]
}