downloading attached .msg file from the email is not opening

Question

Hello

In my program i am retrieving the incoming emails and also downloading the attachments if any which comes along with the email.

The problem i am facing is if there is any .msg file (like an outlook email as an attachment) comes than my program is able to download it successfully but the file is not opening.

Any inputs on how to resolve this would be really helpful.

Thanks in advance.