Email Formats

{
  "mx": [
    "20 mail2.ipg-potsdam.de.",
    "10 mail.ipg-potsdam.de."
  ],
  "spf": [
    "v=spf1 a mx ip4:85.13.133.76 ip4:87.139.110.158 ip4:90.187.30.13 -all"
  ]
}