[Dovecot] unknown namespace with Mac OS client

[Rick Romero]

> > Hmm. Actually now that I think of it, it's not necessarily that much  
> > broken. I originally thought that they'd have identical namespace  
> > prefixes, but since they're INBOX. and INBOX/ they're a bit  
> > different. :) Anyway you should mark one of them with hidden=yes so  
> 
> In my original email I asked if putting that setting would help and  Barry 
> Warsaw replied that it would not help. I think he tried it.
> 
> > clients that support namespaces won't show all the mailboxes twice.  
> > Also make only one of them have inbox=yes.
> 
> Ok, will try that with the next machine before it goes into production, but 
> I guess I will need to find out if someone at work uses mail.app at home 
> and can help me with the testing.. or perhaps see if someone on this list is 
> willing to help with this. I could give them a test account on the next 
> machine we are setting up this week.. This was not easy for us to 
> troubleshoot/test/diagnose because we don't have a machine with Mail.app to 
> test.

I have a Mac - and I also run Thunderbird, Evolution and Horde/IMP.  The
last two I had issues with when I had those 'funky' namespace settings
that fixed Mail.app.

I have some of my own server work to do - but I might not even get that
far this month.  I do have a Horde/IMP beta site that I could redirect
to test that out.