Email Formats

{
  "mx": [
    "10 mx0.rtm-bit.at.",
    "20 mx1.rtm-bit.at.",
    "30 mx3.rtm-bit.at.",
    "40 mx4.rtm-bit.at."
  ],
  "spf": [
    "v=spf1 a mx -all"
  ]
}