On Mon, 2012-01-02 at 17:17 +0100, Preacher wrote:
So I forced to install the Debisn 7.0 packages with 2.0.15 and finally got the server running, I also restarted the whole machine to empty caches. But the problem I got was that in the huge folder hierarchy the downloaded headers in the individual folders disappeared, some folders showed a few very old messages, some none. Also some subfolders disappeared. I checked this with Outlook and Thunderbird. The difference was, that Thunderbird shows more messages (but not all) than Outlook in some folders, but also none in some others. Outlook brought up a message in some cases, that the connection timed out, although I set the timeout to 60s.
Did you run the Courier migration script? http://wiki2.dovecot.org/Migration/Courier
Also explicitly setting mail_location would be a good idea.