Email Formats

{
  "mx": [
    "10 mx.usa.net.",
    "20 mx.ct.mbox.net."
  ],
  "spf": [
    "v=spf1 include:spf.protection.outlook.com include:spf.usa.net ip4:205.144.218.110 ip4:52.200.252.231 ip4:52.21.224.229 include:spf.constantcontact.com -all"
  ]
}