We're now more than two years later, and I would still like to reiterate that having attachments at the bottom is a bad idea. I keep overlooking the attachments if they are not explicitly mentioned in the email itself.
I haven't personally run into the issue of attachments opening in the wrong program, but I second that it's inconvenient to have the attachments at the bottom. I (literally) can't tell you how often I've just completely missed that emails have an att...