OT: How make emails readable?

I'm very sorry another email of mine got out where the formatting got 
screwed up.
I tried several ways and sent test emails to myself first. Plain text 
instead of HTML looks terrible, so I made screenshots. This worked fine for 
my own inbox, but apparently the images get swiped when sent to the list.
Now I don't know how to add input from R to an email without it being lost 
or unreadable.
Any advice?
Thanks


Diana Michl, M.A.
dmichl at uni-potsdam.de