I configured my mum's Mail.app to move emails automatically which are older than 30 days (sent emails to a special folder, received emails to a different folder). This doesn't work - huh?
So, when I use right-click and choose "apply rules manually" fro the contextual menu, it just works and moves the emails - but it doesn't work automatically. Now what?
I wanted to switch my mum to imap, I realized already 30 days is much too short, rather 60 months, probably, but she's e-mailing rather a lot and the email provider hosts only 2 GB, and she's over 10 GB already...