diff --git a/lib/API/JSON/v1/Subscribers.php b/lib/API/JSON/v1/Subscribers.php
index e093070447..096bf20fdc 100644
--- a/lib/API/JSON/v1/Subscribers.php
+++ b/lib/API/JSON/v1/Subscribers.php
@@ -199,12 +199,19 @@ class Subscribers extends APIEndpoint {
     $id = (isset($data['id']) ? (int)$data['id'] : false);
     $subscriber = $this->subscribersRepository->findOneById($id);
     if ($subscriber instanceof SubscriberEntity) {
-      if ($this->confirmationEmailMailer->sendConfirmationEmail($subscriber)) {
-        return $this->successResponse();
+      try {
+        if ($this->confirmationEmailMailer->sendConfirmationEmail($subscriber)) {
+          return $this->successResponse();
+        } else {
+          return $this->errorResponse([
+            APIError::UNKNOWN => __('There was a problem with your sending method. Please check if your sending method is properly configured.', 'mailpoet'),
+          ]);
+        }
+      } catch (\Exception $e) {
+        return $this->errorResponse([
+          APIError::UNKNOWN => __('There was a problem with your sending method. Please check if your sending method is properly configured.', 'mailpoet'),
+        ]);
       }
-      return $this->errorResponse([
-        APIError::UNKNOWN => __('There was a problem with your sending method. Please check if your sending method is properly configured.', 'mailpoet'),
-      ]);
     } else {
       return $this->errorResponse([
         APIError::NOT_FOUND => WPFunctions::get()->__('This subscriber does not exist.', 'mailpoet'),
diff --git a/lib/API/MP/v1/API.php b/lib/API/MP/v1/API.php
index 602a1e9da4..4a4f4d6442 100644
--- a/lib/API/MP/v1/API.php
+++ b/lib/API/MP/v1/API.php
@@ -148,11 +148,13 @@ class API {
 
     // send confirmation email
     if ($sendConfirmationEmail) {
-      $result = $this->_sendConfirmationEmail($subscriber);
-      if (!$result && $subscriber->getErrors()) {
+      try {
+        $this->_sendConfirmationEmail($subscriber);
+      } catch (\Exception $e) {
         throw new APIException(
-          __(sprintf('Subscriber added to lists, but confirmation email failed to send: %s', strtolower(implode(', ', $subscriber->getErrors()))), 'mailpoet'),
-        APIException::CONFIRMATION_FAILED_TO_SEND);
+          __(sprintf('Subscriber added to lists, but confirmation email failed to send: %s', strtolower($e->getMessage())), 'mailpoet'),
+          APIException::CONFIRMATION_FAILED_TO_SEND
+        );
       }
     }
 
diff --git a/lib/Segments/WP.php b/lib/Segments/WP.php
index 82b755089a..7c43edc181 100644
--- a/lib/Segments/WP.php
+++ b/lib/Segments/WP.php
@@ -151,7 +151,11 @@ class WP {
         $confirmationEmailMailer = ContainerWrapper::getInstance()->get(ConfirmationEmailMailer::class);
         $subscriberEntity = $this->subscribersRepository->findOneById($subscriber->id);
         if ($subscriberEntity instanceof SubscriberEntity) {
-          $confirmationEmailMailer->sendConfirmationEmailOnce($subscriberEntity);
+          try {
+            $confirmationEmailMailer->sendConfirmationEmailOnce($subscriberEntity);
+          } catch (\Exception $e) {
+            // ignore errors
+          }
         }
       }
 
diff --git a/lib/Subscribers/ConfirmationEmailMailer.php b/lib/Subscribers/ConfirmationEmailMailer.php
index ae43c5f864..41090b542f 100644
--- a/lib/Subscribers/ConfirmationEmailMailer.php
+++ b/lib/Subscribers/ConfirmationEmailMailer.php
@@ -7,7 +7,6 @@ use MailPoet\Entities\SegmentEntity;
 use MailPoet\Entities\SubscriberEntity;
 use MailPoet\Mailer\Mailer;
 use MailPoet\Mailer\MetaInfo;
-use MailPoet\Models\Subscriber;
 use MailPoet\Services\AuthorizedEmailsController;
 use MailPoet\Services\Bridge;
 use MailPoet\Settings\SettingsController;
@@ -59,6 +58,7 @@ class ConfirmationEmailMailer {
    * Use this method if you want to make sure the confirmation email
    * is not sent multiple times within a single request
    * e.g. if sending confirmation emails from hooks
+   * @throws \Exception if unable to send the email.
    */
   public function sendConfirmationEmailOnce(SubscriberEntity $subscriber): bool {
     if (isset($this->sentEmails[$subscriber->getId()])) {
@@ -67,6 +67,9 @@ class ConfirmationEmailMailer {
     return $this->sendConfirmationEmail($subscriber);
   }
 
+  /**
+   * @throws \Exception if unable to send the email.
+   */
   public function sendConfirmationEmail(SubscriberEntity $subscriber) {
     $signupConfirmation = $this->settings->get('signup_confirmation');
     if ((bool)$signupConfirmation['enabled'] === false) {
@@ -119,29 +122,27 @@ class ConfirmationEmailMailer {
       ],
     ];
 
-    $subscriberModel = Subscriber::findOne($subscriber->getId());
-
     // send email
+    $extraParams = [
+      'meta' => $this->mailerMetaInfo->getConfirmationMetaInfo($subscriber),
+    ];
     try {
-      $extraParams = [
-        'meta' => $this->mailerMetaInfo->getConfirmationMetaInfo($subscriber),
-      ];
       $result = $this->mailer->send($email, $subscriber, $extraParams);
-      if ($result['response'] === false) {
-        $subscriberModel->setError(__('Something went wrong with your subscription. Please contact the website owner.', 'mailpoet'));
-        return false;
-      };
-
-      if (!$this->wp->isUserLoggedIn()) {
-        $subscriber->setConfirmationsCount($subscriber->getConfirmationsCount() + 1);
-        $this->subscribersRepository->persist($subscriber);
-        $this->subscribersRepository->flush();
-      }
-      $this->sentEmails[$subscriber->getId()] = true;
-      return true;
     } catch (\Exception $e) {
-      $subscriberModel->setError(__('Something went wrong with your subscription. Please contact the website owner.', 'mailpoet'));
-      return false;
+      throw new \Exception(__('Something went wrong with your subscription. Please contact the website owner.', 'mailpoet'));
     }
+
+    if ($result['response'] === false) {
+      throw new \Exception(__('Something went wrong with your subscription. Please contact the website owner.', 'mailpoet'));
+    };
+
+    if (!$this->wp->isUserLoggedIn()) {
+      $subscriber->setConfirmationsCount($subscriber->getConfirmationsCount() + 1);
+      $this->subscribersRepository->persist($subscriber);
+      $this->subscribersRepository->flush();
+    }
+    $this->sentEmails[$subscriber->getId()] = true;
+
+    return true;
   }
 }
diff --git a/lib/Subscribers/SubscriberActions.php b/lib/Subscribers/SubscriberActions.php
index 7284cd6d6e..8c8c18ca5c 100644
--- a/lib/Subscribers/SubscriberActions.php
+++ b/lib/Subscribers/SubscriberActions.php
@@ -103,7 +103,12 @@ class SubscriberActions {
     // link subscriber to segments
     $segments = $this->segmentsRepository->findBy(['id' => $segmentIds]);
     $this->subscriberSegmentRepository->subscribeToSegments($subscriber, $segments);
-    $this->confirmationEmailMailer->sendConfirmationEmailOnce($subscriber);
+
+    try {
+      $this->confirmationEmailMailer->sendConfirmationEmailOnce($subscriber);
+    } catch (\Exception $e) {
+      // ignore errors
+    }
 
     $subscriberModel = Subscriber::findOne($subscriber->getId());
 
diff --git a/lib/WooCommerce/Subscription.php b/lib/WooCommerce/Subscription.php
index 6e5eccaf2e..ec0757cf11 100644
--- a/lib/WooCommerce/Subscription.php
+++ b/lib/WooCommerce/Subscription.php
@@ -225,7 +225,11 @@ class Subscription {
       $this->subscribersRepository->persist($subscriberEntity);
       $this->subscribersRepository->flush();
 
-      $this->confirmationEmailMailer->sendConfirmationEmailOnce($subscriberEntity);
+      try {
+        $this->confirmationEmailMailer->sendConfirmationEmailOnce($subscriberEntity);
+      } catch (\Exception $e) {
+        // ignore errors
+      }
     }
   }
 
diff --git a/tests/integration/API/MP/APITest.php b/tests/integration/API/MP/APITest.php
index c00d11ebdf..14b5b12b4a 100644
--- a/tests/integration/API/MP/APITest.php
+++ b/tests/integration/API/MP/APITest.php
@@ -576,9 +576,8 @@ class APITest extends \MailPoetTest {
     $confirmationMailer = $this->createMock(ConfirmationEmailMailer::class);
     $confirmationMailer->expects($this->once())
       ->method('sendConfirmationEmailOnce')
-      ->willReturnCallback(function (Subscriber $subscriber) {
-        $subscriber->setError('Big Error');
-        return false;
+      ->willReturnCallback(function () {
+        throw new \Exception('Big Error');
       });
 
     $API = Stub::copy($this->getApi(), [
diff --git a/tests/integration/Subscribers/ConfirmationEmailMailerTest.php b/tests/integration/Subscribers/ConfirmationEmailMailerTest.php
index b7358e0de0..06ee329a77 100644
--- a/tests/integration/Subscribers/ConfirmationEmailMailerTest.php
+++ b/tests/integration/Subscribers/ConfirmationEmailMailerTest.php
@@ -95,7 +95,7 @@ class ConfirmationEmailMailerTest extends \MailPoetTest {
     expect($this->subscriber->getConfirmationsCount())->equals(1);
   }
 
-  public function testItReturnsFalseWhenConfirmationEmailCannotBeSent() {
+  public function testItThrowsExceptionWhenConfirmationEmailCannotBeSent() {
     $mailer = Stub::makeEmpty(Mailer::class, [
       'send' =>
         Stub\Expected::once(function () {
@@ -111,7 +111,27 @@ class ConfirmationEmailMailerTest extends \MailPoetTest {
       $this->diContainer->get(SubscriptionUrlFactory::class)
     );
 
-    $this->assertFalse($sender->sendConfirmationEmail($this->subscriber));
+    $this->expectException(\Exception::class);
+    $this->expectExceptionMessage(__('Something went wrong with your subscription. Please contact the website owner.', 'mailpoet'));
+    $sender->sendConfirmationEmail($this->subscriber);
+  }
+
+  public function testSendConfirmationEmailThrowsWhenSendReturnsFalse() {
+    $mailer = Stub::makeEmpty(Mailer::class, [
+      'send' => ['response' => false],
+    ], $this);
+
+    $sender = new ConfirmationEmailMailer(
+      $mailer,
+      $this->diContainer->get(WPFunctions::class),
+      $this->diContainer->get(SettingsController::class),
+      $this->diContainer->get(SubscribersRepository::class),
+      $this->diContainer->get(SubscriptionUrlFactory::class)
+    );
+
+    $this->expectException(\Exception::class);
+    $this->expectExceptionMessage(__('Something went wrong with your subscription. Please contact the website owner.', 'mailpoet'));
+    $sender->sendConfirmationEmail($this->subscriber);
   }
 
   public function testItDoesntSendWhenMSSIsActiveAndConfirmationEmailIsNotAuthorized() {