For the longest time I have been the mad professor of email folders, with tons of separate folders organized by subject (particular clients, administrivia, personal, etc.). I have been fairly religious about keeping my inbox empty and use a fairly rigorous system of filters and popfile to tag, categorize, and redirect incoming email into the proper folder.

I've been looking at Merlin's three-folder system as well as Gina Trapani's Trusted Trio action-based system and they make a lot of sense to me.

But one flaw with these systems is they don't account for long-term storage of emails after they've passed through the Action|Hold|Archive process.

So, how do you handle the archiving of email? I run Mac OS X and while spotlight does a pretty good job of finding email, I would assume that at some point having some kind of folder hierarchy is still necessary. Or is it?