diff --git a/mailpoet/lib/Subscribers/SubscriberSubscribeController.php b/mailpoet/lib/Subscribers/SubscriberSubscribeController.php
index 406c2856e2..e6e9f75707 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, $subscriptionMeta] = $this->subscriberActions->subscribe($data, $segmentIds);
 
     if (!empty($captchaSettings['type']) && $captchaSettings['type'] === CaptchaConstants::TYPE_BUILTIN) {
       // Captcha has been verified, invalidate the session vars
@@ -166,6 +166,12 @@ class SubscriberSubscribeController {
     // add tags to subscriber if they are filled
     $this->addTagsToSubscriber($formSettings['tags'] ?? [], $subscriber);
 
+    // Confirmation email failed. We want to show the error message
+    if ($subscriptionMeta['confirmationEmailResult'] instanceof \Exception) {
+      $meta['error'] = $subscriptionMeta['confirmationEmailResult']->getMessage();
+      return $meta;
+    }
+
     if (!empty($formSettings['on_success'])) {
       if ($formSettings['on_success'] === 'page') {
         // redirect to a page on a success, pass the page url in the meta
diff --git a/mailpoet/tests/integration/Subscribers/SubscriberSubscribeControllerTest.php b/mailpoet/tests/integration/Subscribers/SubscriberSubscribeControllerTest.php
index 6bc90c28bd..0c9bfa325a 100644
--- a/mailpoet/tests/integration/Subscribers/SubscriberSubscribeControllerTest.php
+++ b/mailpoet/tests/integration/Subscribers/SubscriberSubscribeControllerTest.php
@@ -91,6 +91,28 @@ class SubscriberSubscribeControllerTest extends \MailPoetTest {
     expect($subscriber->getStatus())->equals(SubscriberEntity::STATUS_UNCONFIRMED);
   }
 
+  public function testItReturnsInfoAboutErrorWhenConfirmationEmailFails(): void {
+    $confirmationEmailMailerMock = $this->createMock(ConfirmationEmailMailer::class);
+    $confirmationEmailMailerMock->method('sendConfirmationEmailOnce')
+      ->willThrowException(new \Exception('Confirmation email error'));
+    $subscriberActions = $this->getServiceWithOverrides(SubscriberActions::class, ['confirmationEmailMailer' => $confirmationEmailMailerMock]);
+    $subscriberController = $this->getServiceWithOverrides(SubscriberSubscribeController::class, ['subscriberActions' => $subscriberActions]);
+    $segment = $this->segmentsRepository->createOrUpdate('Segment 1');
+    $form = $this->createForm($segment);
+
+    $data = [
+      $this->obfuscatedEmail => 'subscriber' . rand(0, 10000) . '@example.com',
+      $this->obfuscatedSegments => [$segment->getId()],
+      'form_id' => $form->getId(),
+    ];
+    $result = $subscriberController->subscribe($data);
+
+    $subscriber = $this->subscribersRepository->findOneBy(['email' => $data[$this->obfuscatedEmail]]);
+    $this->assertInstanceOf(SubscriberEntity::class, $subscriber);
+    expect($result)->hasKey('error');
+    expect($result['error'])->equals('Confirmation email error');
+  }
+
   public function testItCanSubscribeSubscriberWithCustomField(): void {
     $this->settings->set('signup_confirmation.enabled', false);
     $segment = $this->segmentsRepository->createOrUpdate('Segment 1');