Email Formats

{
  "mx": [
    "50 mx.rcn.com."
  ],
  "spf": [
    "v=spf1 ip4:207.172.4.0/24 ip4:207.172.157.0/24 ip4:208.58.56.0/24 include:_spf.rcn.syn-alias.com ~all"
  ]
}