diff --git a/src/Queue/QueueProcessor.php b/src/Queue/QueueProcessor.php
index df1b02d3..48adca4a 100644
--- a/src/Queue/QueueProcessor.php
+++ b/src/Queue/QueueProcessor.php
@@ -3,6 +3,7 @@
 
 namespace Genkgo\Mail\Queue;
 
+use Genkgo\Mail\Exception\AbstractProtocolException;
 use Genkgo\Mail\Exception\ConnectionRefusedException;
 use Genkgo\Mail\Exception\EmptyQueueException;
 use Genkgo\Mail\TransportInterface;
@@ -43,7 +44,7 @@ public function process()
                 while ($message = $queue->fetch()) {
                     try {
                         $this->transport->send($message);
-                    } catch (ConnectionRefusedException $e) {
+                    } catch (AbstractProtocolException $e) {
                         $queue->store($message);
 
                         // do not continue transporting messages
diff --git a/test/Unit/Queue/ProcessorTest.php b/test/Unit/Queue/ProcessorTest.php
index b215bfb0..e9b7081a 100644
--- a/test/Unit/Queue/ProcessorTest.php
+++ b/test/Unit/Queue/ProcessorTest.php
@@ -2,6 +2,7 @@
 
 namespace Genkgo\TestMail\Unit\Queue;
 
+use Genkgo\Mail\Exception\AbstractProtocolException;
 use Genkgo\TestMail\AbstractTestCase;;
 use Genkgo\Mail\Exception\ConnectionRefusedException;
 use Genkgo\Mail\GenericMessage;
@@ -81,6 +82,34 @@ public function it_will_readd_failed_messages_to_queue() {
         $this->assertCount(3, $storage);
     }
 
+    /**
+     * @test
+     */
+    public function it_will_readd_messages_resulting_in_any_protocol_exception() {
+        $storage = new \ArrayObject();
+
+        $queue = new ArrayObjectQueue($storage);
+        $queue->store($this->newMessage('Test 1'));
+        $queue->store($this->newMessage('Test 2'));
+        $queue->store($this->newMessage('Test 3'));
+
+        $transport = $this->createMock(TransportInterface::class);
+        $transport
+            ->expects($this->once())
+            ->method('send')
+            ->with($this->callback(function (GenericMessage $message) {
+                $this->assertEquals('Test 1', $message->getHeader('subject')[0]->getValue());
+                return true;
+            }))
+            ->willThrowException(new class extends AbstractProtocolException{})
+        ;
+
+        $processor = new QueueProcessor($transport, [$queue]);
+        $processor->process();
+
+        $this->assertCount(3, $storage);
+    }
+
     /**
      * @param string $subject
      * @return MessageInterface