Email Formats

{
  "mx": [
    "30 mx-biz.mail.am0.yahoodns.net.",
    "20 mx-biz.mail.am0.yahoodns.net."
  ],
  "spf": [
    "v=spf1 ip4:34.194.137.104 include:_spf.mail.yahoo.com -all",
    "v=spf1ptr:yahoo.comptr:yahoo.net?all"
  ]
}