How to enable email forward in Virtualmin

SYSTEM INFORMATION
OS type and version Ubuntu Linux 24.04.3
Webmin version 2.510
Virtualmin version 7.40.1
Webserver version 2.4.58

Hi all,

I unchecked Mail for domain in Edit Virtual Server and then rechecked it but the setting for email forwarding has gone for this domain


Could you tell me how to make it appear again please ?
Thank you very much!

I have figured out that by enabling Primary email address enabled
CLose post now. Thanks !