Hi Timo i found "the bug" with autocreate in dovecot 1.2 last weeks i tested a lot with namespaces i finally declared shared namespace before private namespace in dovecot.conf by doing a lot of copy paste namespace test variants
getting autocreate to work i finally copied my private namespace declaration above the shared namespace in dovecot.conf and now its working. So it simple autocreate parses the dovecot.conf from begin and uses the first namespace found in dovecot.conf , if that namespace doesnt match its going do log namespace not found in the log and stop working so its by design ,not really a bug , but it should dokumented elsewhere if you wont fix that behavior in the future -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria