Carriage returns in e-mail

I think I might have had this problem a long time ago, but it wasn't resolved, because here it is again. My carriage returns (\r\n) aren't getting e-mailed. I have some text: The quick brown fox\r\n\r\n jumped over the whateverwhateverwhatever\r\n\r\n yadda yadda yadda. I want to create double-spacing between paragraphs. This works out fine onsite (I've seen the output, and it does the proper double-spacing). However, when I e-mail it, it's all crunched down into single-spacing, so everything is all jumbled together and crowded. Anyone have any idea why it's doing this?