Email Formats

{
  "mx": [
    "30 mx1.biz.mail.yahoo.com.",
    "20 mx5.biz.mail.yahoo.com.",
    "10 mx-biz.mail.am0.yahoodns.net."
  ],
  "spf": [
    "v=spf1 +a +mx include:_spf.bigcommerce.com include:spf.mandrillapp.com ptr:yahoo.com -all"
  ]
}