diff --git a/lib/Segments/WP.php b/lib/Segments/WP.php
index e7b679694c..4acbf513a6 100644
--- a/lib/Segments/WP.php
+++ b/lib/Segments/WP.php
@@ -2,6 +2,8 @@
 namespace MailPoet\Segments;
 
 use MailPoet\Models\ModelValidator;
+use MailPoet\Models\StatisticsClicks;
+use MailPoet\Models\StatisticsOpens;
 use MailPoet\Models\Subscriber;
 use MailPoet\Models\Segment;
 use MailPoet\Models\SubscriberSegment;
@@ -91,6 +93,7 @@ class WP {
     self::updateFirstNameIfMissing();
     self::insertUsersToSegment();
     self::removeOrphanedSubscribers();
+    self::markSpammyWordpressUsersAsUnconfirmed();
 
     return true;
   }
@@ -220,4 +223,17 @@ class WP {
       ->set('wp_user_id', null)
       ->delete();
   }
+
+  private static function markSpammyWordpressUsersAsUnconfirmed() {
+    global $wpdb;
+    $query = '
+      UPDATE %s as subscribers
+      LEFT JOIN %s as clicks ON subscribers.id=clicks.subscriber_id 
+      LEFT JOIN %s as opens ON subscribers.id=opens.subscriber_id 
+      JOIN %s as usermeta ON usermeta.user_id=subscribers.wp_user_id AND usermeta.meta_key = "default_password_nag" AND usermeta.meta_value = "1"
+      SET `status` = "unconfirmed"
+      WHERE `wp_user_id` IS NOT NULL AND `status` = "subscribed" AND `confirmed_at` IS NULL AND clicks.id IS NULL AND opens.id IS NULL
+    ';
+    $wpdb->query(sprintf($query, Subscriber::$_table, StatisticsClicks::$_table, StatisticsOpens::$_table, $wpdb->usermeta));
+  }
 }
diff --git a/tests/integration/Segments/WPTest.php b/tests/integration/Segments/WPTest.php
index 4f4f9bcc27..9c82b30a89 100644
--- a/tests/integration/Segments/WPTest.php
+++ b/tests/integration/Segments/WPTest.php
@@ -244,6 +244,20 @@ class WPTest extends \MailPoetTest  {
     expect($db_subscriber)->isEmpty();
   }
 
+  function testItMarksSpammySubscribersAsUnconfirmed() {
+    $random_number = rand();
+    $id = $this->insertUser($random_number);
+    $subscriber = Subscriber::createOrUpdate([
+      'email' => 'user-sync-test' . $random_number . '@example.com',
+      'status' => Subscriber::STATUS_SUBSCRIBED,
+      'wp_user_id' => $id,
+    ]);
+    update_user_meta($id, 'default_password_nag', '1');
+    WP::synchronizeUsers();
+    $db_subscriber = Subscriber::findOne($subscriber->id);
+    expect($db_subscriber->status)->equals(Subscriber::STATUS_UNCONFIRMED);
+  }
+
   function _before() {
     parent::_before();
     $this->cleanData();