Email Formats

{
  "mx": [
    "30 mx-biz.mail.am0.yahoodns.net.",
    "20 mx-biz.mail.am0.yahoodns.net."
  ],
  "spf": [
    "v=spf1 mx ip4:50.255.16.64/26 include:amazonses.com ptr:yahoo.com ~all"
  ]
}