Save email as file

I am looking for a way to save an Outlook email (.msg format) as a complete original file in a folder.
Has anyone already found a solution?
I would be very grateful for any information or help.

Use a file node to write the email it to file system in the "folder" specified with a suitable filename "an-email.msg"

Of course this assumes you already have the email and it is in msg.payload - you didnt state!

The problem is that the 'node-red-node-email' node splits the incoming email into objects (header, html, from, attachments, ...) and thus the email as such is not loaded into msg.payload. msg.payload ist 'undefined'

Why don't you use a change node to put the parts into the payload as you would like the to be.