diff --git a/mailpoet/lib/Models/Subscriber.php b/mailpoet/lib/Models/Subscriber.php
index 6a50d1d1e6..b19ab67d95 100644
--- a/mailpoet/lib/Models/Subscriber.php
+++ b/mailpoet/lib/Models/Subscriber.php
@@ -700,6 +700,7 @@ class Subscriber extends Model {
   public static function subscribe($subscriberData = [], $segmentIds = []) {
     trigger_error('Calling Subscriber::subscribe() is deprecated and will be removed. Use MailPoet\API\MP\v1\API instead. ', E_USER_DEPRECATED);
     $service = ContainerWrapper::getInstance()->get(\MailPoet\Subscribers\SubscriberActions::class);
-    return $service->subscribe($subscriberData, $segmentIds);
+    [$subscriber] = $service->subscribe($subscriberData, $segmentIds);
+    return $subscriber;
   }
 }
diff --git a/mailpoet/lib/Subscribers/SubscriberActions.php b/mailpoet/lib/Subscribers/SubscriberActions.php
index e2370f4580..6887f033c6 100644
--- a/mailpoet/lib/Subscribers/SubscriberActions.php
+++ b/mailpoet/lib/Subscribers/SubscriberActions.php
@@ -54,7 +54,11 @@ class SubscriberActions {
     $this->segmentsRepository = $segmentsRepository;
   }
 
-  public function subscribe($subscriberData = [], $segmentIds = []): SubscriberEntity {
+  /**
+   * Returns SubscriberEntity and associative array with some metadata related to the subscription (e.g. ['confirmationEmailResult' => $exception])
+   * @return array{0: SubscriberEntity, 1: array{confirmationEmailResult: bool|\Exception}}
+   */
+  public function subscribe($subscriberData = [], $segmentIds = []): array {
     // filter out keys from the subscriber_data array
     // that should not be editable when subscribing
     $subscriberData = $this->subscriberSaveController->filterOutReservedColumns($subscriberData);
@@ -98,14 +102,16 @@ class SubscriberActions {
     }
 
     $this->subscribersRepository->flush();
+
+    $metaData = ['confirmationEmailResult' => false];
     // link subscriber to segments
     $segments = $this->segmentsRepository->findBy(['id' => $segmentIds]);
     $this->subscriberSegmentRepository->subscribeToSegments($subscriber, $segments);
 
     try {
-      $this->confirmationEmailMailer->sendConfirmationEmailOnce($subscriber);
+      $metaData['confirmationEmailResult'] = $this->confirmationEmailMailer->sendConfirmationEmailOnce($subscriber);
     } catch (\Exception $e) {
-      // ignore errors
+      $metaData['confirmationEmailResult'] = $e;
     }
 
     // We want to send the notification on subscribe only when signupConfirmation is disabled
@@ -118,6 +124,6 @@ class SubscriberActions {
       );
     }
 
-    return $subscriber;
+    return [$subscriber, $metaData];
   }
 }
diff --git a/mailpoet/lib/Subscribers/SubscriberSubscribeController.php b/mailpoet/lib/Subscribers/SubscriberSubscribeController.php
index 7ea02bfade..406c2856e2 100644
--- a/mailpoet/lib/Subscribers/SubscriberSubscribeController.php
+++ b/mailpoet/lib/Subscribers/SubscriberSubscribeController.php
@@ -151,7 +151,7 @@ class SubscriberSubscribeController {
      */
     $this->wp->doAction('mailpoet_subscription_before_subscribe', $data, $segmentIds, $form);
 
-    $subscriber = $this->subscriberActions->subscribe($data, $segmentIds);
+    [$subscriber] = $this->subscriberActions->subscribe($data, $segmentIds);
 
     if (!empty($captchaSettings['type']) && $captchaSettings['type'] === CaptchaConstants::TYPE_BUILTIN) {
       // Captcha has been verified, invalidate the session vars
diff --git a/mailpoet/lib/Subscription/Comment.php b/mailpoet/lib/Subscription/Comment.php
index 1246930396..1555f1e4d7 100644
--- a/mailpoet/lib/Subscription/Comment.php
+++ b/mailpoet/lib/Subscription/Comment.php
@@ -106,7 +106,7 @@ class Comment {
     if (!empty($segmentIds)) {
       $comment = WPFunctions::get()->getComment($commentId);
 
-      $result = $this->subscriberActions->subscribe(
+      $this->subscriberActions->subscribe(
         [
           'email' => $comment->comment_author_email, // phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
           'first_name' => $comment->comment_author, // phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
diff --git a/mailpoet/tests/integration/Subscribers/SubscriberActionsTest.php b/mailpoet/tests/integration/Subscribers/SubscriberActionsTest.php
index bfb167a13c..75570b64f7 100644
--- a/mailpoet/tests/integration/Subscribers/SubscriberActionsTest.php
+++ b/mailpoet/tests/integration/Subscribers/SubscriberActionsTest.php
@@ -55,7 +55,7 @@ class SubscriberActionsTest extends \MailPoetTest {
     $segment = $this->segmentsRepository->createOrUpdate('List #1');
     $segment2 = $this->segmentsRepository->createOrUpdate('List #2');
 
-    $subscriber = $this->subscriberActions->subscribe(
+    [$subscriber] = $this->subscriberActions->subscribe(
       $this->testData,
       [$segment->getId(), $segment2->getId()]
     );
@@ -86,7 +86,7 @@ class SubscriberActionsTest extends \MailPoetTest {
     (new NewsletterOption())->createMultipleOptions($newsletter, $newsletterOptions);
 
     $this->settings->set('signup_confirmation.enabled', false);
-    $subscriber = $this->subscriberActions->subscribe($this->testData, [$segment->getId()]);
+    [$subscriber] = $this->subscriberActions->subscribe($this->testData, [$segment->getId()]);
     expect($subscriber->getId() > 0)->equals(true);
     expect($subscriber->getSegments())->count(1);
 
@@ -113,7 +113,7 @@ class SubscriberActionsTest extends \MailPoetTest {
     (new NewsletterOption())->createMultipleOptions($newsletter, $newsletterOptions);
 
     $this->settings->set('signup_confirmation.enabled', true);
-    $subscriber = $this->subscriberActions->subscribe($this->testData, [$segment->getId()]);
+    [$subscriber] = $this->subscriberActions->subscribe($this->testData, [$segment->getId()]);
     expect($subscriber->getId() > 0)->equals(true);
     expect($subscriber->getSegments())->count(1);
     $scheduledNotification = $this->sendingQueuesRepository->findOneByNewsletterAndTaskStatus(
@@ -126,7 +126,7 @@ class SubscriberActionsTest extends \MailPoetTest {
   public function testItCannotSubscribeWithReservedColumns() {
     $segment = $this->segmentsRepository->createOrUpdate('List #1');
 
-    $subscriber = $this->subscriberActions->subscribe(
+    [$subscriber] = $this->subscriberActions->subscribe(
       [
         'email' => 'donald@mailpoet.com',
         'first_name' => 'Donald',
@@ -174,7 +174,7 @@ class SubscriberActionsTest extends \MailPoetTest {
       'last_name' => 'Example',
     ];
 
-    $subscriber = $this->subscriberActions->subscribe(
+    [$subscriber] = $this->subscriberActions->subscribe(
       $data,
       [$segment->getId()]
     );
@@ -189,7 +189,7 @@ class SubscriberActionsTest extends \MailPoetTest {
     $data2['first_name'] = 'Aaa';
     $data2['last_name'] = 'Bbb';
 
-    $subscriber = $this->subscriberActions->subscribe(
+    [$subscriber] = $this->subscriberActions->subscribe(
       $data2,
       [$segment->getId(), $segment2->getId()]
     );
@@ -216,7 +216,7 @@ class SubscriberActionsTest extends \MailPoetTest {
       'last_name' => 'Example',
     ];
 
-    $subscriber = $this->subscriberActions->subscribe(
+    [$subscriber] = $this->subscriberActions->subscribe(
       $data,
       [$segment->getId()]
     );
@@ -233,7 +233,7 @@ class SubscriberActionsTest extends \MailPoetTest {
     $data2['first_name'] = 'Aaa';
     $data2['last_name'] = 'Bbb';
 
-    $subscriber = $this->subscriberActions->subscribe(
+    [$subscriber] = $this->subscriberActions->subscribe(
       $data2,
       [$segment->getId(), $segment2->getId()]
     );
diff --git a/mailpoet/tests/unit/Subscribers/SubscriberSubscribeControllerUnitTest.php b/mailpoet/tests/unit/Subscribers/SubscriberSubscribeControllerUnitTest.php
index cbded2d8ea..9cc783d20e 100644
--- a/mailpoet/tests/unit/Subscribers/SubscriberSubscribeControllerUnitTest.php
+++ b/mailpoet/tests/unit/Subscribers/SubscriberSubscribeControllerUnitTest.php
@@ -659,7 +659,7 @@ class SubscriberSubscribeControllerUnitTest extends \MailPoetUnitTest {
 
           expect($receivedData)->equals($formFields);
           expect($receivedSegmentIds)->equals($segmentIds);
-          return $subscriber;
+          return [$subscriber, ['confirmationEmailResult' => true]];
         },
       ],
       $this