Email Formats

{
  "mx": [
    "300 mail.b2book.net."
  ],
  "spf": [
    "v=spf1 a mx ip4:216.70.64.219 include:_spf.google.com include:spf.autopilothq.com include:sendgrid.net include:spf.mailjet.com ~all"
  ]
}