Hrmm...perhaps an effect of my cutting and pasting? The body of my email gets read into a variable (so it's like slurping a file). I can't seem to split on newlines, and if I use a regex to count I get only one in each email (which I presume is at the end).
Thank you for the implicit character class ([^:]) suggestion, by the way. I hate putting .* into regexes, even with the non-greedy modifier.