diff --git a/src/Email.php b/src/Email.php
index 5be98c97ed5c69cea7c05b43000e7bab08620eee..864d11c53b0e4ef0d9b4a0bd3f5ca7c2b08295c8 100644
--- a/src/Email.php
+++ b/src/Email.php
@@ -469,7 +469,10 @@ class Email extends BaseEmail implements InternalEmailInterface {
     foreach ($this->addresses as $name => $addresses) {
       $value = [];
       foreach ($addresses as $address) {
-        $value[] = $address->getSymfony();
+        $email = $address->getEmail();
+        if (!empty($email)) {
+          $value[] = $address->getSymfony();
+        }
       }
       if ($value) {
         // Convert headers to camel case.