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

{
  "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,
      "relay_server_id": 123,
      "relay_server_name": "<string>",
      "relay_server_provider": "<string>",
      "projects": "<string>",
      "domains": "<string>",
      "mailboxes": "<string>",
      "sent_emails": -1,
      "status": "<string>"
    }
  ]
}