Email Formats

{
  "mx": [
    "20 d100898b.ess.barracudanetworks.com.",
    "10 d100898a.ess.barracudanetworks.com."
  ],
  "spf": [
    "v=spf1 mx ptr ip4:64.235.144.0/20 ip4:209.222.80.0/21 include:spf.ess.barracudanetworks.com include:_spf.smtp.com -all"
  ]
}