I’m getting back on track. I restored my mails today and having such a clean mailbox is a good reason to only restore the mails that are really useful, throwing away the junk. When emptying the trash, a recognizable warning shows up:
That is funny. The major update in Leopard is Time Machine and with that, you CAN actually undo that removal. I configured Time Machine today and it is awesome. Indeed: anything you have removed by accident (and I mean anything: the entire system is being watched) can be restored with three clicks. Literally. The system creates an incremental backup every hour. You don’t have to do anything, just making sure your disk is connected.