On Sat, 2012-04-28 at 18:09 +0200, Dieter Knopf wrote:

i'm using kmail2 and for Folder Settings the SETANNOATION command is needed.

Is there any way to add this command to Dovecot?

I already found a dovecot-metadata-plugin

That might do it, but it's not fully finished yet.

but there is no Package available for Debian.

Nope.