[masraum]

As far as "saved" mail. Just don't delete the mail. If you don't delete it, then it's saved. Actually, even when you delete mail, it's not really deleted. Gmail has a "Trash" folder which is just like the Windows Recycle bin. It's unlikely that most folks will actually permanently delete mail from Gmail unless they are working really hard at it.

I'm not sure about your sent mail, that's weird. Mine has everything that I've sent in it.