Email Formats

{
  "mx": [
    "40 nationalbusiness-org.p40.mxthunder.net.",
    "20 nationalbusiness-org.p20.mxthunder.net.",
    "30 nationalbusiness-org.p30.mxthunder.net.",
    "10 nationalbusiness-org.p10.mxthunder.com."
  ],
  "spf": [
    "v=spf1 a ip4:96.30.29.41 ~all"
  ]
}