Email Formats

{
  "mx": [
    "10 d154284b.ess.barracudanetworks.com.",
    "0 d154284a.ess.barracudanetworks.com."
  ],
  "spf": [
    "v=spf1 include:spf.ess.barracudanetworks.com include:listrak.com ip4:209.166.164.172 ip4:52.190.24.47 ip4:209.166.164.161 ~all"
  ]
}