[Dovecot] MUA notifications on new mail in a new folder?
Kārlis Repsons
Karlis.Repsons at gmail.com
Wed Jan 20 23:39:41 EET 2010
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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