curl --request GET \
  --url https://api-v2.missioninbox.com/relay_servers/

{
  "count": 123,
  "next": "http://api.example.org/accounts/?offset=400&limit=100",
  "previous": "http://api.example.org/accounts/?offset=200&limit=100",
  "results": [
    {
      "id": 123,
      "domain_count": "<string>",
      "mailbox_count": "<string>",
      "name": "<string>",
      "transporter_key": "<string>",
      "transporter_provider": "<string>",
      "slug": "<string>",
      "users": [
        123
      ]
    }
  ]
}