diff --git a/core/modules/user/user.admin.inc b/core/modules/user/user.admin.inc
index dcd76d7..cb71a61 100644
--- a/core/modules/user/user.admin.inc
+++ b/core/modules/user/user.admin.inc
@@ -389,6 +389,15 @@ function user_admin_settings($form, &$form_state) {
     '#default_value' => $config->get('signatures'),
   );
 
+  // Default notifications address.
+  $form['mail_notification_address'] = array(
+    '#type' => 'email',
+    '#title' => t('E-mail address'),
+    '#default_value' => config('system.site')->get('mail_notification'),
+    '#description' => t("The e-mail address to be used as the 'from' address for all notifications. If <em>'Visitors, but administrator approval is required'</em> is selected above, a notification email will also be sent to this address for any new registrations. Leave empty to use the default system e-mail address <em>(%site-email).</em>", array('%site-email' => config('system.site')->get('mail'))),
+    '#maxlength' => 180,
+  );
+
   $form['email_title'] = array(
     '#type' => 'item',
     '#title' => t('E-mails'),
@@ -647,6 +656,9 @@ function user_admin_settings_submit($form, &$form_state) {
     ->set('status_canceled.body', $form_state['values']['user_mail_status_canceled_body'])
     ->set('status_canceled.subject', $form_state['values']['user_mail_status_canceled_subject'])
     ->save();
+  config('system.site')
+    ->set('mail_notification', $form_state['values']['mail_notification_address'])
+    ->save();
 }
 
 /**
diff --git a/core/modules/user/user.module b/core/modules/user/user.module
index 4921c98..fc0d640 100644
--- a/core/modules/user/user.module
+++ b/core/modules/user/user.module
@@ -2487,14 +2487,21 @@ function _user_mail_notify($op, $account, $langcode = NULL) {
   if ($notify || ($op != 'status_canceled' && $op != 'status_blocked')) {
     $params['account'] = $account;
     $langcode = $langcode ? $langcode : user_preferred_langcode($account);
-    $mail = drupal_mail('user', $op, $account->mail, $langcode, $params);
+    // Get the custom site notification email to use as the from email address
+    // if it has been set.
+    $site_mail = config('system.site')->get('mail_notification');
+    // If the custom site notification email has not been set, we use the site
+    // default for this.
+    if (empty($site_mail)) {
+      $site_mail = config('system.site')->get('mail');
+    }
+    if (empty($site_mail)) {
+      $site_mail = ini_get('sendmail_from');
+    }
+    $mail = drupal_mail('user', $op, $account->mail, $langcode, $params, $site_mail);
     if ($op == 'register_pending_approval') {
       // If a user registered requiring admin approval, notify the admin, too.
       // We use the site default language for this.
-      $site_mail = config('system.site')->get('mail');
-      if (empty($site_mail)) {
-        $site_mail = ini_get('sendmail_from');
-      }
       drupal_mail('user', 'register_pending_approval_admin', $site_mail, language_default()->langcode, $params);
     }
   }