ugh... and to further complicate things. I can't seem to find any easy way to switch to receiving plain text on my Outlook. I'm on a mac, and the option isn't anywhere I can find. I had to have somebody on pc do the above test
Don't know where to find that setting in Outlook/Mac as I'm a PC guy but it's surely somewhere in there...
(and no, there's nothing that needs escaping, the idea is the output block is redefined for each MIME part)