### Models: - Setting (global settings like retention, rate_limit) - Backend (service implementation postfix, mailgun,.. ) - Person (real person) - Contact (email, phone, device_token,....) - Message - MessageEvent ### Message: - uuid - title - body - contact_id (contact is auto-created) - attachments ### MessageEvent: - backend_type - backend_status - backend_id - service_uuid (message_id for postfix) - status: :created, :delivered, :failed, :delayed
