[Tickets #6972] Re: mailbox listing speed-up

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Ticket URL: http://bugs.horde.org/ticket/6972
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  Ticket             | 6972
  Updated By         | Michael Slusarz <slusarz at horde.org>
  Summary            | mailbox listing speed-up
  Queue              | IMP
  Version            | 4.2
  Type               | Enhancement
  State              | Feedback
  Priority           | 2. Medium
  Milestone          |
  Patch              | 1
  Owners             | Horde Developers, Michael Slusarz
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Michael Slusarz <slusarz at horde.org> (2008-06-26 15:34) wrote:

> I'm not actually too worried about that, though that would be nice -
> what's more curious is that I don't use subscriptions (they're turned
> off in my prefs) and IMP started to use them.

I don't see the subscriptions issue with the latest version - maybe it  
was fixed in the last few days.

As for the other issue, dovecot is exhibiting correct behavior.  From  
RFC 3501 [6.3.9]:

       The returned untagged LSUB response MAY contain different mailbox
       flags from a LIST untagged response.  If this should happen, the
       flags in the untagged LIST are considered more authoritative.

       ...

       The server MUST NOT unilaterally remove an existing mailbox name
       from the subscription list even if a mailbox by that name no
       longer exists.

So if viewing only subscribed folders, we do need to cross-reference  
with imap_list() results to get an accurate representation of the  
current subscribed folders.