[Dovecot] IMAP IDLE, Virtual mailboxes

[Patrick Nagel]

Hi Timo,

great hearing from you again, hope the exams went well :)

On 2010-04-13 19:01 UTC Timo Sirainen wrote:
> On 9.4.2010, at 9.31, Patrick Nagel wrote:
> > 2) Enhancing dovecot's Virtual plugin, so virtual mailboxes do not
> > only get updated on select and expunge, but also when anything
> > changes that affects the set of messages shown in the virtual
> > mailbox. I guess that would have an impact on performance, and
> > thus should be optional.
> 
> Virtual plugin does already work like that. Although there's a bug
> where messages don't get removed from mailbox always:
> 
>  - virtual: removed messages don't get expunged unless EXPUNGE is
> issued in same session. otherwise they get forgotten and never
> removed.

Oh, I see. I'll give it another try then, I believe I tried this, but 
never got notified of new mails in the virtual mailbox through the IMAP 
IDLE connection.

> And NOTIFY isn't implemented yet mainly because it would be
> annoyingly expensive (as is virtual mailbox when it's created from
> many real mailboxes). I've been planning on implementing mailbox
> list indexes (or they already are implemented, but they're buggy)
> that would make this much cheaper. Basically NOTIFY could just keep
> watching for changes to dovecot.list.index.log file, and then read
> what mailbox had changed and how and notify client about it,
> possibly without even opening the mailbox itself.

That sounds like a good plan - basically having "logwatch" on all IMAP 
operations :) I'd be happy to test once you have anything to be tested 
(just need to find a MUA other than telnet+brain that has IMAP NOTIFY 
implemented first ;) ).

Patrick.

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