Email Formats

{
  "mx": [
    "40 sullivancorp-com.p40.mxthunder.net.",
    "30 sullivancorp-com.p30.mxthunder.net.",
    "20 sullivancorp-com.p20.mxthunder.net.",
    "10 sullivancorp-com.p10.mxthunder.com."
  ]
}