In looking to make some room on my MacBook Pro's Hard drive, I ran the excellent Disk Inventory X
As I expected, movies, my Aperture Archive and other media-intensive files took up a ton of my space. But I was surprised to find that files that Disk Inventory X categorized as "Mail Message" took up a whopping 22 GB.
I mostly use Apple Mail as my email client, although I've been giving Sparrow another try lately. But in either case, other than a legacy MobileMe account that I never use, Gmail is my mail provider (and storage facility).
What the heck is stored locally in that size, and can I safely delete it somehow?
(I can't fathom it matters, but I'm running Lion.)