Email Formats

{
  "mx": [
    "10 mail4.citec-ag.de.",
    "30 mail5.citec-ag.de.",
    "20 mail3.citec-ag.de."
  ],
  "spf": [
    "v=spf1 mx a include:ispgateway.de ip4:95.131.100.117 ip4:185.5.31.242 ip4:93.241.235.57 -all"
  ]
}