Email Formats

{
  "mx": [
    "30 mx-biz.mail.am0.yahoodns.net.",
    "10 mx-biz.mail.am0.yahoodns.net.",
    "20 mx-biz.mail.am0.yahoodns.net."
  ],
  "spf": [
    "v=spf1 ptr:yahoo.com ptr:yahoo.net ?all"
  ]
}