New IMAP capability for advertising support for shared Seen state (was Re: "Cyrus IMAP4" to "Cyrus IMAP" accidental change of greeting?)

Martin Konold martin.konold at
Mon Apr 20 01:37:05 EDT 2009

Am Sonntag, 12. April 2009 10:44:03 schrieb Alexey Melnikov:


> Bernhard Reiter wrote:

> >>following (don't forget that shared seen state is per-mailbox):
> >>

> >>GETANNOTATION <mboxname> "/vendor/cmu/cyrus-imapd/sharedseen" "value"
> >>
> >>If you get an empty response, then no shared seen state. 

> >question. It is not feasable to try to set the annotation on a  test
> > folder for each connection IMO. So best would be if there would be a
> > SHAREDSEEN or so capability.
> I would support standardizing of such IMAP capability.

Technically it would be required to test with every mailbox not only with each 
connection. E.g. there are sometimes reasons why the shared seen is only 
available for some namespaces.

IMHO probing each mailbox or each namesapce is not an option and would pervert 
the efficiency of IMAP especially over high latency low bandwidth links.

On the other hand capabilities should not be expanded without good reasons.

What about a server provided GETANNOTATION answer?

-- martin

e r f r a k o n
Erlewein, Frank, Konold & Partner - Beratende Ingenieure und Physiker
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