dovecot - Jun 2009 - Question about "target is inferior" type of message

We're converting UW-IMAP users here to dovecot. Some of them have seen  
the error message
issued when Thunderbird clients try to delete folders and I understand  
what's going on (from
previous postings) that Dovecot doesn't support mbox subfolders within  
folders.

What puzzles me is that many of these users already have folders  
within folders (I've found
typically 2 levels of nested folders within their main Mail  
directory). And they're not complaining
that they can't read the messages in those folders. If UW-IMAP  
supposedly never supported
this for mbox format, and Dovecot doesn't support it, how is this  
possible under Dovecot?
(We don't have any maildir format mailboxes here at all).

On Jun 17, 2009, at 11:00 AM, Michael Durket wrote:
> We're converting UW-IMAP users here to dovecot. Some of them have  
> seen the error message
> issued when Thunderbird clients try to delete folders and I  
> understand what's going on (from
> previous postings) that Dovecot doesn't support mbox subfolders  
> within folders.
>
Hi Michael,
	I'm running dovecot 1.2beta5. I'm not sure which version does not  
support folders with subfolders, but 1.2x does. Here are some imap  
commands to prove it works.

2 list "mail" *
* LIST (\Noselect \HasChildren) "/" "mail"
* LIST (\NoInferiors \UnMarked) "/" "mail/folder1"
* LIST (\NoInferiors \UnMarked) "/" "mail/folder2"
* LIST (\NoInferiors \UnMarked) "/" "mail/Trash"
* LIST (\Noselect \HasChildren) "/" "mail/anotherfolder"
* LIST (\NoInferiors \UnMarked) "/"
"mail/anotherfolder/mbox1"
* LIST (\NoInferiors \UnMarked) "/" "mail/foo2"
* LIST (\NoInferiors \UnMarked) "/" "mail/foo3"
2 OK List completed.
3 list "mail/anotherfolder" *
* LIST (\Noselect \HasChildren) "/" "mail/anotherfolder"
* LIST (\NoInferiors \UnMarked) "/"
"mail/anotherfolder/mbox1"
3 OK List completed.
4 delete mail/anotherfolder/mbox1
4 OK Delete completed.
5 delete mail/anotherfolder
5 OK Delete completed.
6 create mail/anotherfolder/
6 OK Create completed.
7 create mail/anotherfolder/mbox2
7 OK Create completed.
8 list "mail/anotherfolder" *
* LIST (\Noselect \HasChildren) "/" "mail/anotherfolder"
* LIST (\NoInferiors \UnMarked) "/"
"mail/anotherfolder/mbox2"
8 OK List completed.

Now there is config setting in dovecot.conf called tb-extra-mailbox- 
sep. Maybe that is what the complaint is. Tbird will put the delimiter  
on the back end of the delete command(delete mail/anotherfolder/).
> What puzzles me is that many of these users already have folders  
> within folders (I've found
> typically 2 levels of nested folders within their main Mail  
> directory). And they're not complaining
> that they can't read the messages in those folders. If UW-IMAP  
> supposedly never supported
> this for mbox format, and Dovecot doesn't support it, how is this  
> possible under Dovecot?
> (We don't have any maildir format mailboxes here at all).
>
>
I have an older version of Uwash in use(2006k?) and folders with  
subfolders works. Maybe you are talking about folders that have  
messages and subfolders?

-Jonathan


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On Wed, 2009-06-17 at 08:00 -0700, Michael Durket wrote:
> We're converting UW-IMAP users here to dovecot. Some of them have seen
> the error message
> issued when Thunderbird clients try to delete folders and I understand  
> what's going on (from
> previous postings) that Dovecot doesn't support mbox subfolders within
> folders.
That error message sounds like the one about not having "Server supports
folders that contain sub-folders and messages" setting disabled in TB.
I've no idea why it would have worked with UW-IMAP previously though.
Maybe TB has some special UW-IMAP-checking code?.. I haven't heard of
that before though.
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