symfony
diff --git a/‎src/Symfony/Component/Mailer/Bridge/Postmark/Tests/Transport/PostmarkApiTransportTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Mailer/Bridge/Postmark/Tests/Transport/PostmarkApiTransportTest.php
+12Lines changed: 12 additions & 0 deletions b/‎src/Symfony/Component/Mailer/Bridge/Postmark/Tests/Transport/PostmarkApiTransportTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Mailer/Bridge/Postmark/Tests/Transport/PostmarkApiTransportTest.php
+12Lines changed: 12 additions & 0 deletions
diff --git a/‎src/Symfony/Component/Mailer/Bridge/Postmark/Transport/PostmarkApiTransport.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Mailer/Bridge/Postmark/Transport/PostmarkApiTransport.php
+1-1Lines changed: 1 addition & 1 deletion b/‎src/Symfony/Component/Mailer/Bridge/Postmark/Transport/PostmarkApiTransport.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Mailer/Bridge/Postmark/Transport/PostmarkApiTransport.php
+1-1Lines changed: 1 addition & 1 deletion
@@ -69,6 +69,18 @@ public function testCustomHeader()
         $this->assertEquals(['Name' => 'foo', 'Value' => 'bar'], $payload['Headers'][0]);
     }
 
+    public function testBypassHeaders()
+    {
+        $email = (new Email())->date(new \DateTimeImmutable());
+        $envelope = new Envelope(new Address('alice@system.com'), [new Address('bob@system.com')]);
+
+        $transport = new PostmarkApiTransport('ACCESS_KEY');
+        $method = new \ReflectionMethod(PostmarkApiTransport::class, 'getPayload');
+        $payload = $method->invoke($transport, $email, $envelope);
+
+        $this->assertArrayNotHasKey('Headers', $payload);
+    }
+
     public function testSend()
     {
         $client = new MockHttpClient(function (string $method, string $url, array $options): ResponseInterface {
 
@@ -91,7 +91,7 @@ private function getPayload(Email $email, Envelope $envelope): array
             'Attachments' => $this->getAttachments($email),
         ];
 
-        $headersToBypass = ['from', 'to', 'cc', 'bcc', 'subject', 'content-type', 'sender', 'reply-to'];
+        $headersToBypass = ['from', 'to', 'cc', 'bcc', 'subject', 'content-type', 'sender', 'reply-to', 'date'];
         foreach ($email->getHeaders()->all() as $name => $header) {
             if (\in_array($name, $headersToBypass, true)) {
                 continue;