discourse/app/assets/javascripts/admin/templates/email_index.hbs

<table class="table">
  <tr>
    <th>{{i18n admin.email.delivery_method}}</th>
    <td>{{model.delivery_method}}</td>
  </tr>

  {{#each model.settings}}
    <tr>
      <th style='width: 25%'>{{name}}</th>
      <td>{{value}}</td>
    </tr>
  {{/each}}
</table>

<div class='admin-controls'>
  {{#if sendingEmail}}
  <div class='span15 controls'>{{i18n admin.email.sending_test}}</div>
  {{else}}
  <div class='controls'>
    {{text-field value=testEmailAddress placeholderKey="admin.email.test_email_address"}}
  </div>
  <div class='span10 controls'>
    <button class='btn btn-primary' {{action sendTestEmail}} {{bind-attr disabled="sendTestEmailDisabled"}}>{{i18n admin.email.send_test}}</button>
    {{#if sentTestEmail}}<span class='result-message'>{{i18n admin.email.sent_test}}</span>{{/if}}
  </div>
  {{/if}}
</div>