I really like Kontact! I was wondering how do you back it up. I have read several howto to back up Kmail however, all I ever back up is the messages that are in the inbox. What is important to me is the addressbook and the calendar. It takes a long time to enter all the data in again and again.
Thanks for your assistance
It turns out you can right-click the mouse in Konqueror on the Mail folder and select compressing in various formats and a Mail.extension is created. You move this compressed file to a safe location, like a USB disk.
Now, this can be done as a cron job I expect, like daily.