Getting the attachments of an msg.-File in SAP UI5

I am currently building a Fiori APP with SAP UI5 to upload files. For this I use the UploadSet provided by SAP, where I can drag in files and then upload them. Now I would like to have the ability to drag in an email file (.msg) and it will show me the attachments as well as the mail. However, since I don't know how to get to the attachments in the SAP UI5 environment, I need your help.

Is there any way to get to these attachments?