[Dovecot] IMAP Clients can not see 3rd tier nested IMAP directories

[William Blunn]

On 07/12/2010 15:37, jjs87 at cornell.edu wrote:
> I have a very bizarre problem that I hope someone can help me with. I 
> am not sure if this is a Dovecot problem, or IMAP client problem.
>
> I recently used Transend's Migrator to move mail from Exchange 2007 to 
> my Dovecot 1.0.7 server. The program seems to have moved the nested 
> IMAP dirs properly as seen below in a directory listing of the maildir 
> dir. The nested dirs have indexes, cur, new dirs as expected.
>
> However, when the account is viewed in Windows Thunderbird 3.1.6 or 
> Outlook 2010 the 3rd tier dirs are not seen, nor can they be 
> subscribed to. On a whim, I decided to try Apple Mail 4.3 to view the 
> account and all the IMAP dirs can be seen and accessed as expected.
>
> Any idea what is going on?  Is this somehow an IMAP client problem 
> (bug) or an issue with Dovecot and these clients?

There is a bug in Thunderbird which causes in this behaviour

http://www.dovecot.org/list/dovecot/2010-September/052620.html

Bill