After searching for days I found the solution yesterday short after I sent my request.
Here's the solution: for some reason KMail marks some mailboxes as "not compactable" After changing that in .kde/share/config/kmailrc I can delete my mails. Acc. to some guys this effect is not limited to mbox, but can also occure with maildir Sorry for being off-topic, but I didn't want to join KDE-Mailing-Lists just for that question. -- Chris Bartl -- [EMAIL PROTECTED] mailing list
