Email Formats

{
  "mx": [
    "5 mdn.corpemail.net.",
    "10 mdn.corp-email.cn.",
    "15 mail.biz-email.net.",
    "20 cnc.biz-email.net."
  ],
  "spf": [
    "v=spf1 include:spf.corp-email.com include:spfb.corp-email.com ~all"
  ]
}