E'Mail::Acme - http://use.perl.org/~rjbs/journal/33806 

I've only fixed about half of the places where I have things like this: 

$wirebird->{foo} = 'bar'; # !! this needs to be put in a method 

(Three bangs means something doesn't work at all (usually "is
missing"), two means it works but needs attention because something's
hardcoded or just plain Poor Style. One means I'm enthusiastic. I'm
down to, um, only twenty-five triple-bangs.)