Due to various and persisting problems, I had to reinstall 10.8.2.
What I did
- Shut down iMac with internal system disc A.
- Started 10.8.2 recovery system
- Copied iMac's system disc A to an external disc B as an image using Disc Util
- Erased system disc A as HFS / journaled
- Run a clean install on A
Then, I told OS X Mail to import old mailboxes from B into the fresh Mail system.
Unfortunately, I got tons of tons of deeply nested folders, which eventually contain email:
/Import-5 V2 POP-something Drafts 0563726277 Data 9 7 8 Mails <this folder finally contains some emails>
Not hardly to see, I can't use these imported folder structure any more.
Is anybody aware of a tool to fix such problems?