On 23.9.2013, at 16.52, megodin@inboxalias.com wrote:

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I suspect your shell is breaking the 8bit chars into invalid UTF-8. I just tried and it works fine with me.

Sorry, we got confusion here... apparently my (lousy) freemail provider which I use to post on this mailinglist doesn't send some special characters etc. unaltered exactly as I typed - so I made a console screenshot of the doveadm rename problem to make things clear. Please have a look here, it will reveal the doveadm rename problem (and that my shell is working fine): http://i.imgur.com/08wKji4.png

If doveadm says it's invalid UTF-8, it's invalid UTF-8. I guess your terminal isn't actually using UTF-8 then, but something else. ("locale" output should say something about UTF-8.) I guess doveadm could also automatically translate parameters to UTF-8, but that's a bit annoying to implement.

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To get things worse, when renaming the mailfolder in Thunderbird to "geschäftliches" it gets correctly written in the filesystem as "gesch&AOQ-ftliches"- but afterwards it's NOT found anymore in the dovecot index, e.g. when trying doveadm force-resync -u user it is not listed anymore (untilback-renaming in fs to the name it was indexed before).

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Folders aren't indexed by default (mailbox_list_index=no) and force-resync doesn't affect them. Are you saying "doveadm mailbox list -u user" doesn't show some folder? I'm not aware of any bugs related to this.

No, the "doveadm mailbox list -u user" works just fine.

BUT - I'm still wondering about the resync issue - As I understand the "doveadm force-resync -u user *" command rebuilds the index for the MAILS within the mailfolders? If so, how can the resync be done if the mailfolder itself is not found by doveadm anymore?

With mailbox_list_index=no there is no way a folder isn't found by doveadm.

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I'd need to get some more specifics. Show show exists in filesystems and what commands don't produce expected results (and what they produce instead).

For clearing up my point, I made another console screenshot with red markings to point out the problem (bug). Please have another look here: http://i.imgur.com/icPfys9.png

The problem here is that * is expanded by your shell, not doveadm. And it expands into Tr&-AOQ-sh as it's in the filesystem, but that's only the mUTF-7 encoding of it. The UTF-8 version of the name is Tr&AOQ-sh. So doveadm only sees that you attempted to resync a nonexistent mailbox. Using '*' with quotes would work, since doveadm would do the expansion then.