diff --git a/src/Command/AlertCommand.php b/src/Command/AlertCommand.php
index bcf898b..d771156 100644
--- a/src/Command/AlertCommand.php
+++ b/src/Command/AlertCommand.php
@@ -12,6 +12,7 @@
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Mime\Exception\RfcComplianceException;
 use Symfony\Component\Routing\RouterInterface;
 use Webgriffe\SyliusBackInStockNotificationPlugin\Entity\SubscriptionInterface;
 use Webgriffe\SyliusBackInStockNotificationPlugin\Repository\SubscriptionRepositoryInterface;
@@ -41,10 +42,10 @@ protected function configure(): void
 
     protected function execute(InputInterface $input, OutputInterface $output): int
     {
-        //I think that this load in the long time can be a bottle necklace
+        // I think that this load in the long time can be a bottleneck
         $subscriptions = $this->backInStockNotificationRepository->findBy(['notify' => false]);
         foreach ($subscriptions as $subscription) {
-            $channel = $subscription->getChannel();
+            $channel        = $subscription->getChannel();
             $productVariant = $subscription->getProductVariant();
             if ($productVariant === null || $channel === null) {
                 $this->backInStockNotificationRepository->remove($subscription);
@@ -62,7 +63,13 @@ protected function execute(InputInterface $input, OutputInterface $output): int
                 $productVariant->getProduct()?->isEnabled() === true
             ) {
                 $this->router->getContext()->setHost($channel->getHostname() ?? 'localhost');
-                $this->sendEmail($subscription, $productVariant, $channel);
+
+                try {
+                    $this->sendEmail($subscription, $productVariant, $channel);
+                } catch (RfcComplianceException $e) {
+                    $this->logger->warning('Invalid email address, continue to the next one: ' . $e->getMessage());
+                    continue;
+                }
                 $subscription->setNotify(true);
                 $this->backInStockNotificationRepository->add($subscription);
             }
diff --git a/src/Form/SubscriptionType.php b/src/Form/SubscriptionType.php
index 4c60ddd..a2ed9f6 100644
--- a/src/Form/SubscriptionType.php
+++ b/src/Form/SubscriptionType.php
@@ -25,7 +25,7 @@ public function buildForm(FormBuilderInterface $builder, array $options): void
             ->add('email', EmailType::class, [
                 'constraints' => [
                     new NotBlank([], null, null, null, ['webgriffe_sylius_back_in_stock_notification_plugin']),
-                    new Email([], null, null, null, ['webgriffe_sylius_back_in_stock_notification_plugin']),
+                    new Email(['mode' => Email::VALIDATION_MODE_STRICT], null, null, null, ['webgriffe_sylius_back_in_stock_notification_plugin']),
                 ],
             ])
             ->add('product_variant_code', HiddenType::class)