Viewing MSG file in the email attachment via OWA

We have requirement to send MSG file as attachment to our end user. Our end user only have OWA Outlook Web Access, thus it's important for them to view the MSG file attached in the email in browser. The current behavior ask user to download MSG file instead of viewing it in browser.

How can we achieve this in Aspose.Email Java?

If we create MSG file in Outlook, we attach it as attachment, and open in OWA, OWA will open it in browser instead of downloading it. 

Thanks