Email Formats

{
  "mx": [
    "10 mx4.vianet.ca.",
    "10 mx3.vianet.ca.",
    "10 mx2.vianet.ca.",
    "10 mx1.vianet.ca."
  ],
  "spf": [
    "v=spf1 include:_spf.vianet.ca ~all"
  ]
}