fix for Issue #25434. Now getEmail method can return null

Author: karyna-t

lib/internal/Magento/Framework/Mail/Address.php

@@ -8,7 +8,7 @@
 namespace Magento\Framework\Mail;
 
 /**
- * Class MailAddress
+ * Class Address
  */
 class Address
 {
@@ -23,13 +23,13 @@ class Address
     private $email;
 
     /**
-     * MailAddress constructor
+     * Address constructor
      *
      * @param string|null $email
      * @param string|null $name
      */
     public function __construct(
-        string $email,
+        ?string $email,
         ?string $name
     ) {
         $this->email = $email;
@@ -49,9 +49,9 @@ public function getName(): ?string
     /**
      * Email getter
      *
-     * @return string
+     * @return string|null
      */
-    public function getEmail(): string
+    public function getEmail(): ?string
     {
         return $this->email;
     }