diff --git a/mailpoet/lib/AutomaticEmails/WooCommerce/Events/AbandonedCart.php b/mailpoet/lib/AutomaticEmails/WooCommerce/Events/AbandonedCart.php
index 76cf7420b0..62b52d4935 100644
--- a/mailpoet/lib/AutomaticEmails/WooCommerce/Events/AbandonedCart.php
+++ b/mailpoet/lib/AutomaticEmails/WooCommerce/Events/AbandonedCart.php
@@ -165,11 +165,11 @@ class AbandonedCart {
     }
 
     $meta = [self::TASK_META_NAME => $cartProductIds];
-    $this->scheduler->scheduleOrRescheduleAutomaticEmail(WooCommerceEmail::SLUG, self::SLUG, $subscriber->getId(), $meta);
+    $this->scheduler->scheduleOrRescheduleAutomaticEmail(WooCommerceEmail::SLUG, self::SLUG, (int)$subscriber->getId(), $meta);
   }
 
   private function rescheduleAbandonedCartEmail(SubscriberEntity $subscriberEntity) {
-    $this->scheduler->rescheduleAutomaticEmail(WooCommerceEmail::SLUG, self::SLUG, $subscriberEntity->getId());
+    $this->scheduler->rescheduleAutomaticEmail(WooCommerceEmail::SLUG, self::SLUG, (int)$subscriberEntity->getId());
   }
 
   private function cancelAbandonedCartEmail() {
@@ -177,7 +177,7 @@ class AbandonedCart {
     if (!$subscriber) {
       return;
     }
-    $this->scheduler->cancelAutomaticEmail(WooCommerceEmail::SLUG, self::SLUG, $subscriber->getId());
+    $this->scheduler->cancelAutomaticEmail(WooCommerceEmail::SLUG, self::SLUG, (int)$subscriber->getId());
   }
 
   private function getSubscriber(): ?SubscriberEntity {
diff --git a/mailpoet/lib/Newsletter/NewslettersRepository.php b/mailpoet/lib/Newsletter/NewslettersRepository.php
index 6648493e14..e87c807e1d 100644
--- a/mailpoet/lib/Newsletter/NewslettersRepository.php
+++ b/mailpoet/lib/Newsletter/NewslettersRepository.php
@@ -65,6 +65,30 @@ class NewslettersRepository extends Repository {
       ->getResult();
   }
 
+  /**
+   * @return NewsletterEntity[]
+   */
+  public function findActiveByTypeAndGroup(string $type, ?string $group): array {
+    $qb = $this->entityManager
+      ->createQueryBuilder()
+      ->select('n')
+      ->from(NewsletterEntity::class, 'n')
+      ->where('n.status = :status')
+      ->setParameter(':status', NewsletterEntity::STATUS_ACTIVE)
+      ->andWhere('n.deletedAt IS NULL')
+      ->andWhere('n.type = :type')
+      ->setParameter('type', $type);
+
+    if ($group) {
+      $qb->join('n.options', 'o', Join::WITH, 'o.value = :group')
+        ->join('o.optionField', 'f', Join::WITH, 'f.name = :nameGroup AND f.newsletterType = :type')
+        ->setParameter('nameGroup', NewsletterOptionFieldEntity::NAME_GROUP)
+        ->setParameter('group', $group);
+    }
+
+    return $qb->getQuery()->getResult();
+  }
+
   /**
    * @param string[] $types
    * @return NewsletterEntity[]
diff --git a/mailpoet/lib/Newsletter/Scheduler/Scheduler.php b/mailpoet/lib/Newsletter/Scheduler/Scheduler.php
index 1fe3a48ef4..4d0e3bff6d 100644
--- a/mailpoet/lib/Newsletter/Scheduler/Scheduler.php
+++ b/mailpoet/lib/Newsletter/Scheduler/Scheduler.php
@@ -2,7 +2,8 @@
 
 namespace MailPoet\Newsletter\Scheduler;
 
-use MailPoet\Models\Newsletter;
+use MailPoet\Entities\NewsletterEntity;
+use MailPoet\Newsletter\NewslettersRepository;
 use MailPoet\WP\Functions as WPFunctions;
 use MailPoetVendor\Carbon\Carbon;
 
@@ -12,10 +13,15 @@ class Scheduler {
   /** @var WPFunctions  */
   private $wp;
 
+  /** @var NewslettersRepository */
+  private $newslettersRepository;
+
   public function __construct(
-    WPFunctions $wp
+    WPFunctions $wp,
+    NewslettersRepository $newslettersRepository
   ) {
     $this->wp = $wp;
+    $this->newslettersRepository = $newslettersRepository;
   }
 
   public function getNextRunDate($schedule, $fromTimestamp = false) {
@@ -65,12 +71,11 @@ class Scheduler {
     return $currentTime;
   }
 
-  public function getNewsletters($type, $group = false) {
-    return Newsletter::getPublished()
-      ->filter('filterType', $type, $group)
-      ->filter('filterStatus', Newsletter::STATUS_ACTIVE)
-      ->filter('filterWithOptions', $type)
-      ->findMany();
+  /**
+   * @return NewsletterEntity[]
+   */
+  public function getNewsletters(string $type, ?string $group = null): array {
+    return $this->newslettersRepository->findActiveByTypeAndGroup($type, $group);
   }
 
   public function formatDatetimeString($datetimeString) {
diff --git a/mailpoet/tests/integration/AutomaticEmails/WooCommerce/Events/AbandonedCartTest.php b/mailpoet/tests/integration/AutomaticEmails/WooCommerce/Events/AbandonedCartTest.php
index 0764fb6a0f..461125b10c 100644
--- a/mailpoet/tests/integration/AutomaticEmails/WooCommerce/Events/AbandonedCartTest.php
+++ b/mailpoet/tests/integration/AutomaticEmails/WooCommerce/Events/AbandonedCartTest.php
@@ -10,6 +10,7 @@ use MailPoet\Entities\ScheduledTaskEntity;
 use MailPoet\Entities\ScheduledTaskSubscriberEntity;
 use MailPoet\Entities\SendingQueueEntity;
 use MailPoet\Entities\SubscriberEntity;
+use MailPoet\Newsletter\NewslettersRepository;
 use MailPoet\Newsletter\Options\NewsletterOptionFieldsRepository;
 use MailPoet\Newsletter\Options\NewsletterOptionsRepository;
 use MailPoet\Newsletter\Scheduler\AutomaticEmailScheduler;
@@ -99,7 +100,7 @@ class AbandonedCartTest extends \MailPoetTest {
     $this->wp = $wp;
     WPFunctions::set($this->wp);
 
-    $this->automaticEmailScheduler = new AutomaticEmailScheduler(new Scheduler($this->wp));
+    $this->automaticEmailScheduler = new AutomaticEmailScheduler(new Scheduler($this->wp, $this->diContainer->get(NewslettersRepository::class)));
 
     $this->wooCommerceMock = $this->mockWooCommerceClass(WooCommerce::class, []);
     $this->wooCommerceCartMock = $this->mockWooCommerceClass(WC_Cart::class, ['is_empty', 'get_cart']);
diff --git a/mailpoet/tests/integration/Newsletter/Blocks/AbandonedCartContentTest.php b/mailpoet/tests/integration/Newsletter/Blocks/AbandonedCartContentTest.php
index 7aceba3c09..38dfbf73c3 100644
--- a/mailpoet/tests/integration/Newsletter/Blocks/AbandonedCartContentTest.php
+++ b/mailpoet/tests/integration/Newsletter/Blocks/AbandonedCartContentTest.php
@@ -8,7 +8,6 @@ use MailPoet\Entities\NewsletterEntity;
 use MailPoet\Entities\NewsletterOptionEntity;
 use MailPoet\Entities\NewsletterOptionFieldEntity;
 use MailPoet\Entities\NewsletterPostEntity;
-use MailPoet\Models\Newsletter;
 use MailPoet\Newsletter\NewslettersRepository;
 use MailPoet\Newsletter\Scheduler\AutomaticEmailScheduler;
 use MailPoet\WP\Functions as WPFunctions;
@@ -198,8 +197,7 @@ class AbandonedCartContentTest extends \MailPoetTest {
   private function createSendingTask($newsletter, $subscriberId = null, $meta = null) {
     $subscriberId = $subscriberId ?: 1; // dummy default value
     $meta = $meta ?: [AbandonedCart::TASK_META_NAME => array_slice($this->productIds, 0, 3)];
-    $sendingTask = $this->automaticEmailScheduler
-      ->createAutomaticEmailSendingTask(Newsletter::findOne($newsletter->getId()), $subscriberId, $meta);
+    $sendingTask = $this->automaticEmailScheduler->createAutomaticEmailSendingTask($newsletter, $subscriberId, $meta);
     return $sendingTask;
   }
 
diff --git a/mailpoet/tests/integration/Newsletter/Scheduler/AutomaticEmailTest.php b/mailpoet/tests/integration/Newsletter/Scheduler/AutomaticEmailTest.php
index da7e8a64b1..9ab2d2f3c3 100644
--- a/mailpoet/tests/integration/Newsletter/Scheduler/AutomaticEmailTest.php
+++ b/mailpoet/tests/integration/Newsletter/Scheduler/AutomaticEmailTest.php
@@ -3,6 +3,8 @@
 namespace MailPoet\Newsletter\Scheduler;
 
 use Codeception\Util\Fixtures;
+use MailPoet\Entities\NewsletterEntity;
+use MailPoet\Entities\NewsletterOptionFieldEntity;
 use MailPoet\Entities\NewsletterPostEntity;
 use MailPoet\Models\Newsletter;
 use MailPoet\Models\NewsletterOption;
@@ -11,6 +13,7 @@ use MailPoet\Models\ScheduledTask;
 use MailPoet\Models\ScheduledTaskSubscriber;
 use MailPoet\Models\SendingQueue;
 use MailPoet\Models\Subscriber;
+use MailPoet\Newsletter\NewslettersRepository;
 use MailPoet\Tasks\Sending as SendingTask;
 use MailPoet\WP\Functions as WPFunctions;
 use MailPoetVendor\Carbon\Carbon;
@@ -21,9 +24,13 @@ class AutomaticEmailTest extends \MailPoetTest {
   /** @var AutomaticEmailScheduler */
   private $automaticEmailScheduler;
 
+  /** @var NewslettersRepository */
+  private $newslettersRepository;
+
   public function _before() {
     parent::_before();
     $this->automaticEmailScheduler = $this->diContainer->get(AutomaticEmailScheduler::class);
+    $this->newslettersRepository = $this->diContainer->get(NewslettersRepository::class);
   }
 
   public function testItCreatesScheduledAutomaticEmailSendingTaskForUser() {
@@ -36,15 +43,15 @@ class AutomaticEmailTest extends \MailPoetTest {
         'afterTimeNumber' => 2,
       ]
     );
-    $newsletter = Newsletter::filter('filterWithOptions', Newsletter::TYPE_AUTOMATIC)->findOne($newsletter->id);
-    assert($newsletter instanceof Newsletter);
+    $newsletter = $this->newslettersRepository->findOneById($newsletter->id);
+    $this->assertInstanceOf(NewsletterEntity::class, $newsletter);
     $subscriber = Subscriber::create();
     $subscriber->hydrate(Fixtures::get('subscriber_template'));
     $subscriber->save();
 
     $this->automaticEmailScheduler->createAutomaticEmailSendingTask($newsletter, $subscriber->id, $meta = null);
     // new scheduled task should be created
-    $task = SendingTask::getByNewsletterId($newsletter->id);
+    $task = SendingTask::getByNewsletterId($newsletter->getId());
     $currentTime = Carbon::createFromTimestamp(WPFunctions::get()->currentTime('timestamp'));
     Carbon::setTestNow($currentTime); // mock carbon to return current time
     expect($task->id)->greaterOrEquals(1);
@@ -68,8 +75,8 @@ class AutomaticEmailTest extends \MailPoetTest {
         'afterTimeNumber' => 2,
       ]
     );
-    $newsletter = Newsletter::filter('filterWithOptions', Newsletter::TYPE_AUTOMATIC)->findOne($newsletter->id);
-    assert($newsletter instanceof Newsletter);
+    $newsletter = $this->newslettersRepository->findOneById($newsletter->id);
+    $this->assertInstanceOf(NewsletterEntity::class, $newsletter);
     $subscriber = Subscriber::create();
     $subscriber->hydrate(Fixtures::get('subscriber_template'));
     $subscriber->save();
@@ -77,7 +84,7 @@ class AutomaticEmailTest extends \MailPoetTest {
 
     $this->automaticEmailScheduler->createAutomaticEmailSendingTask($newsletter, $subscriber->id, $meta);
     // new queue record should be created with meta data
-    $queue = SendingQueue::where('newsletter_id', $newsletter->id)->findOne();
+    $queue = SendingQueue::where('newsletter_id', $newsletter->getId())->findOne();
     assert($queue instanceof SendingQueue);
     expect($queue->getMeta())->equals($meta);
   }
@@ -92,12 +99,12 @@ class AutomaticEmailTest extends \MailPoetTest {
         'afterTimeNumber' => 2,
       ]
     );
-    $newsletter = Newsletter::filter('filterWithOptions', Newsletter::TYPE_AUTOMATIC)->findOne($newsletter->id);
-    assert($newsletter instanceof Newsletter);
+    $newsletter = $this->newslettersRepository->findOneById($newsletter->id);
+    $this->assertInstanceOf(NewsletterEntity::class, $newsletter);
 
     $this->automaticEmailScheduler->createAutomaticEmailSendingTask($newsletter, $subscriber = null, $meta = null);
     // new scheduled task should be created
-    $task = SendingTask::getByNewsletterId($newsletter->id);
+    $task = SendingTask::getByNewsletterId($newsletter->getId());
     $currentTime = Carbon::createFromTimestamp(WPFunctions::get()->currentTime('timestamp'));
     Carbon::setTestNow($currentTime); // mock carbon to return current time
     expect($task->id)->greaterOrEquals(1);
@@ -170,15 +177,15 @@ class AutomaticEmailTest extends \MailPoetTest {
         'afterTimeNumber' => 2,
       ]
     );
-    $condition = function($email) {
-      return $email->sendTo === 'segment';
+    $condition = function(NewsletterEntity $email) {
+      return $email->getOptionValue(NewsletterOptionFieldEntity::NAME_SEND_TO) === 'segment';
     };
 
     $wpMock = $this->createMock(WPFunctions::class);
     $wpMock->expects($this->any())
       ->method('currentTime')
       ->willReturn($currentTime->getTimestamp());
-    $automaticEmailScheduler = new AutomaticEmailScheduler(new Scheduler($wpMock));
+    $automaticEmailScheduler = new AutomaticEmailScheduler(new Scheduler($wpMock, $this->diContainer->get(NewslettersRepository::class)));
     // email should only be scheduled if it matches condition ("send to segment")
     $automaticEmailScheduler->scheduleAutomaticEmail('some_group', 'some_event', $condition);
     $result = SendingQueue::findMany();
diff --git a/mailpoet/tests/integration/Newsletter/Scheduler/SchedulerTest.php b/mailpoet/tests/integration/Newsletter/Scheduler/SchedulerTest.php
index ac9b0856bc..638b6b9b73 100644
--- a/mailpoet/tests/integration/Newsletter/Scheduler/SchedulerTest.php
+++ b/mailpoet/tests/integration/Newsletter/Scheduler/SchedulerTest.php
@@ -2,18 +2,20 @@
 
 namespace MailPoet\Test\Newsletter\Scheduler;
 
+use MailPoet\Entities\NewsletterEntity;
+use MailPoet\Entities\NewsletterOptionEntity;
+use MailPoet\Entities\NewsletterOptionFieldEntity;
 use MailPoet\Entities\NewsletterPostEntity;
+use MailPoet\Entities\ScheduledTaskEntity;
+use MailPoet\Entities\ScheduledTaskSubscriberEntity;
+use MailPoet\Entities\SendingQueueEntity;
+use MailPoet\Entities\SubscriberEntity;
 use MailPoet\Models\Newsletter;
 use MailPoet\Models\NewsletterOption;
 use MailPoet\Models\NewsletterOptionField;
-use MailPoet\Models\ScheduledTask;
-use MailPoet\Models\ScheduledTaskSubscriber;
-use MailPoet\Models\SendingQueue;
-use MailPoet\Models\Subscriber;
 use MailPoet\Newsletter\Scheduler\Scheduler;
 use MailPoet\WP\Functions as WPFunctions;
 use MailPoetVendor\Carbon\Carbon;
-use MailPoetVendor\Idiorm\ORM;
 
 class SchedulerTest extends \MailPoetTest {
 
@@ -26,26 +28,26 @@ class SchedulerTest extends \MailPoetTest {
   }
 
   public function testItGetsActiveNewslettersFilteredByTypeAndGroup() {
-    $this->_createNewsletter($type = Newsletter::TYPE_WELCOME);
+    $this->_createNewsletter(NewsletterEntity::TYPE_WELCOME);
 
     // no newsletters with type "notification" should be found
-    expect($this->testee->getNewsletters(Newsletter::TYPE_NOTIFICATION))->isEmpty();
+    expect($this->testee->getNewsletters(NewsletterEntity::TYPE_NOTIFICATION))->isEmpty();
 
     // one newsletter with type "welcome" should be found
-    expect($this->testee->getNewsletters(Newsletter::TYPE_WELCOME))->count(1);
+    expect($this->testee->getNewsletters(NewsletterEntity::TYPE_WELCOME))->count(1);
 
     // one automatic email belonging to "test" group should be found
-    $newsletter = $this->_createNewsletter($type = Newsletter::TYPE_AUTOMATIC);
+    $newsletter = $this->_createNewsletter(NewsletterEntity::TYPE_AUTOMATIC);
     $this->_createNewsletterOptions(
       $newsletter->id,
-      Newsletter::TYPE_AUTOMATIC,
+      NewsletterEntity::TYPE_AUTOMATIC,
       [
-        'group' => 'test',
+        NewsletterOptionFieldEntity::NAME_GROUP => 'test',
       ]
     );
 
-    expect($this->testee->getNewsletters(Newsletter::TYPE_AUTOMATIC, 'group_does_not_exist'))->isEmpty();
-    expect($this->testee->getNewsletters(Newsletter::TYPE_WELCOME, 'test'))->count(1);
+    expect($this->testee->getNewsletters(Newsletter::TYPE_WELCOME, 'group_does_not_exist'))->isEmpty();
+    expect($this->testee->getNewsletters(Newsletter::TYPE_AUTOMATIC, 'test'))->count(1);
   }
 
   public function testItCanGetNextRunDate() {
@@ -107,13 +109,13 @@ class SchedulerTest extends \MailPoetTest {
 
   public function _after() {
     Carbon::setTestNow();
-    ORM::raw_execute('TRUNCATE ' . Newsletter::$_table);
-    ORM::raw_execute('TRUNCATE ' . NewsletterOption::$_table);
-    ORM::raw_execute('TRUNCATE ' . NewsletterOptionField::$_table);
+    $this->truncateEntity(NewsletterEntity::class);
+    $this->truncateEntity(NewsletterOptionEntity::class);
+    $this->truncateEntity(NewsletterOptionFieldEntity::class);
     $this->truncateEntity(NewsletterPostEntity::class);
-    ORM::raw_execute('TRUNCATE ' . ScheduledTask::$_table);
-    ORM::raw_execute('TRUNCATE ' . ScheduledTaskSubscriber::$_table);
-    ORM::raw_execute('TRUNCATE ' . SendingQueue::$_table);
-    ORM::raw_execute('TRUNCATE ' . Subscriber::$_table);
+    $this->truncateEntity(ScheduledTaskEntity::class);
+    $this->truncateEntity(ScheduledTaskSubscriberEntity::class);
+    $this->truncateEntity(SendingQueueEntity::class);
+    $this->truncateEntity(SubscriberEntity::class);
   }
 }
diff --git a/mailpoet/tests/integration/Newsletter/Scheduler/WelcomeTest.php b/mailpoet/tests/integration/Newsletter/Scheduler/WelcomeTest.php
index 8d3f15bd51..7cfac8ce18 100644
--- a/mailpoet/tests/integration/Newsletter/Scheduler/WelcomeTest.php
+++ b/mailpoet/tests/integration/Newsletter/Scheduler/WelcomeTest.php
@@ -467,7 +467,7 @@ class WelcomeTest extends \MailPoetTest {
       $this->segmentRepository,
       $this->diContainer->get(NewslettersRepository::class),
       $this->diContainer->get(ScheduledTasksRepository::class),
-      new Scheduler($wpMock)
+      new Scheduler($wpMock, $this->diContainer->get(NewslettersRepository::class))
     );
   }
 
diff --git a/mailpoet/tests/unit/Newsletter/Scheduler/SchedulerTest.php b/mailpoet/tests/unit/Newsletter/Scheduler/SchedulerTest.php
index 3fcfbeabf1..cb639bc0c7 100644
--- a/mailpoet/tests/unit/Newsletter/Scheduler/SchedulerTest.php
+++ b/mailpoet/tests/unit/Newsletter/Scheduler/SchedulerTest.php
@@ -2,6 +2,7 @@
 
 namespace MailPoet\Test\Newsletter\Editor;
 
+use MailPoet\Newsletter\NewslettersRepository;
 use MailPoet\Newsletter\Scheduler\Scheduler;
 use MailPoet\WP\Functions as WPFunctions;
 use MailPoetVendor\Carbon\Carbon;
@@ -24,7 +25,8 @@ class SchedulerTest extends \MailPoetUnitTest {
     $wp = $this->makeEmpty(WPFunctions::class, [
       'currentTime' => $this->currentTime->getTimestamp(),
     ]);
-    $this->testee = new Scheduler($wp);
+    $newslettersRepository = $this->makeEmpty(NewslettersRepository::class);
+    $this->testee = new Scheduler($wp, $newslettersRepository);
   }
 
   public function testItScheduleTimeWithDelayByHours(): void {