[Dovecot] MUA notifications on new mail in a new folder?

[Kārlis Repsons]

On Wednesday 20 January 2010 21:29:37 Timo Sirainen wrote:
> On 20.1.2010, at 23.17, Kārlis Repsons wrote:
> > What exactly? Does a MUA gets notified about both the new folder and
> > mail?
> >
> >> But this is more of a client and/or IMAP protocol problem. Nothing
> >> Dovecot can do about it.
> >
> > Could you, please, explain why can it be a protocol problem?
> 
> In IMAP a single connection can select a single folder. When it has
>  selected the folder, it gets notifications about changes to that one
>  specific folder. When it issues IDLE command, it gets those notifications
>  immediately.
> 
> There are no automatic notifications about changes to non-selected folders.
>  There are two ways clients can get these:
> 
> a) They'll create n connections to select n folders and issue IDLE command
>  for them. This won't work if there are a lot of folders. For example
>  Dovecot limits the number of connections/ip to 10.
> 
> b) They'll issue STATUS commands to ask for folder state every n minutes.
> 
> Typically it seems to be a combination of a) and b). There is a NOTIFY
>  extension that supports notifying changes to non-selected folders, but
>  there are very close to zero servers and clients supporting it. Dovecot
>  will, some day..
Thanks!
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