Thanks for the help Ray. At the time I wrote here I didn't have email working due to another unrelated issue. However, shortly after, I was in touch with Jesper, he answered my question and wrote that he would maybe put this one into his site FAQ, to which I replied...
"Well that made my problem easy enough to sort out and putting it in the FAQ would help others with the same problem. Although you might also add what the format of the file should be, since that is not immediately obvious and editing that file could be tricky if you don't pay attention to what you are doing."