discourse/app/assets/javascripts/admin/routes/admin-email-incomings.js

import DiscourseRoute from "discourse/routes/discourse";
import IncomingEmail from "admin/models/incoming-email";

export default DiscourseRoute.extend({
  model() {
    return IncomingEmail.findAll({ status: this.status });
  },

  setupController(controller, model) {
    controller.set("model", model);
    controller.set("filter", { status: this.status });
  }
});