Email Formats

{
  "mx": [
    "35 mailbackup02.sysup.email.",
    "30 mailbackup01.sysup.email.",
    "10 mail.joebstl-group.com.",
    "15 mail2.joebstl-group.com."
  ],
  "spf": [
    "v=spf1 mx a -all"
  ]
}