Update README.md

Author: mechelon

README.md

@@ -27,6 +27,16 @@ composer require beyondcode/laravel-mailbox
 
 Take a look at the [official documentation](https://docs.beyondco.de/laravel-mailbox).
 
+## Catch, test and debug application mails with Laravel Herd
+
+Laravel Herd provides an integrated local email service, streamlining the process of testing and debugging application emails.
+The email service organizes emails into distinct inboxes for each application, ensuring they are easily accessible and simple to locate.
+
+[herd.laravel.com](https://herd.laravel.com)
+
+![image](https://github.com/user-attachments/assets/6417907c-119d-43ac-9cf6-5638bafae24f)
+
+
 ### Testing
 
 ``` bash