Email Formats

{
  "mx": [
    "20 mx-biz.mail.am0.yahoodns.net.",
    "30 mx-biz.mail.am0.yahoodns.net."
  ],
  "spf": [
    "v=spf1 mx a ptr ip4:35.209.127.155 a:yahoo.com include:yahoo.com, include:mail.yahoo.com ~all"
  ]
}