We show you how to do just that onmacOS Catalina(10.15).
The same functionality exists in earlier versions of Mail, but the menu and command names may differ.
From theMessagemenu, selectForward.
To forward the entire message, including theheader, from theMessagemenu, selectForward as Attachment.
A new email opens with the forwarded messages in the body.
When you’re done, selectSend.
From theEditmenu, selectAppend Selected Messages.
In some versions of Mail, theAppend Selected Messagescommand appears in theMessagesmenu, instead.
