Email Formats

{
  "mx": [
    "0 cardinaltracking-com.mx1.arsmtp.com.",
    "1 cardinaltracking-com.mx2.arsmtp.com.",
    "4 front-mail.cardinaltracking.com."
  ],
  "spf": [
    "v=spf1 include:_spf.google.com include:171402.spf04.hubspotemail.net ~all"
  ]
}