Adrian,
That's exactly what it means. We are on early access and I was just about to email an invoice. The attached document is marked to email automatically unless "X" is clicked.
In this case it is only a drawing but I recon this is asking for trouble when the breakup of a quote is accidentally emailed with the invoice to the customer. I noticed it but other staff probably won't.
I have just put in a feature request if you want to put a vote on it.
Do Not Auto Include Attachments with Invoice Email | MYOB Community
