I wrote a Netscape mail reader when I was at exobox... it turned out to be pretty simple to cut the file into individual strings wirh emails. You just have to scan for
CrLf, 'From -'
ignore that line and go to the next one or the end of file. Experiment: save a draft with this in the body (without quotes):
That's the Unix format, too. (Although with just LF's, not CRLF's.)
-Lex