Email Formats

{
  "mx": [
    "10 mx1c28.concentric.com.",
    "110 mx3c28.concentric.com.",
    "120 mx4c28.concentric.com.",
    "100 mx2c28.concentric.com."
  ],
  "spf": [
    "v=spf1 ip4:66.96.128.0/18 include:websitewelcome.com ?all"
  ]
}