Email Formats

{
  "mx": [
    "11 mx2c28.concentric.com.",
    "11 mx3c28.concentric.com.",
    "12 mx1c28.carrierzone.com.",
    "10 mx1c28.concentric.com."
  ],
  "spf": [
    "v=spf1 a mx include:spfc28.carrierzone.com ~all"
  ]
}