Email Formats

{
  "mx": [
    "1 smtp.google.com."
  ],
  "spf": [
    "v=spf1 a mx include:_spf.google.com include:mktomail.com include:amazonses.com include:mail.zendesk.com include:stspg-customer.com ~all",
    "v=spf1 include:_spf.firebasemail.com ~all"
  ]
}