discourse/app/assets/javascripts/admin/addon/components/modal/incoming-email.hbs

<DModal
  class="admin-incoming-email-modal"
  @title={{i18n "admin.email.incoming_emails.modal.title"}}
  @closeModal={{@closeModal}}
  @bodyClass="incoming-emails"
>
  <:body>
    <div class="control-group">
      <label>{{i18n "admin.email.incoming_emails.modal.error"}}</label>
      <div class="controls">
        <p>{{@model.error}}</p>
        {{#if @model.error_description}}
          <p class="error-description">{{@model.error_description}}</p>
        {{/if}}
      </div>
    </div>

    <hr />

    <div class="control-group">
      <label>{{i18n "admin.email.incoming_emails.modal.headers"}}</label>
      <div class="controls">
        <Textarea @value={{@model.headers}} wrap="off" />
      </div>
    </div>

    <div class="control-group">
      <label>{{i18n "admin.email.incoming_emails.modal.subject"}}</label>
      <div class="controls">
        {{@model.subject}}
      </div>
    </div>

    <div class="control-group">
      <label>{{i18n "admin.email.incoming_emails.modal.body"}}</label>
      <div class="controls">
        <Textarea @value={{@model.body}} />
      </div>
    </div>

    {{#if @model.rejection_message}}
      <hr />

      <div class="control-group">
        <label>{{i18n
            "admin.email.incoming_emails.modal.rejection_message"
          }}</label>
        <div class="controls">
          <Textarea @value={{@model.rejection_message}} />
        </div>
      </div>
    {{/if}}
  </:body>
</DModal>