add

src/server/views/admin/app.html

@@ -149,7 +149,8 @@
           <div class="col-xs-4">
             <label>{{ t('app_setting.Host') }}</label>
             <input class="form-control"
-                   type="text" name="settingForm[mail:smtpHost]"
+                   type="text"
+                   name="settingForm[mail:smtpHost]"
                    value="{{ settingForm['mail:smtpHost']|default('') }}">
           </div>
           <div class="col-xs-2">