On Mon, 2010-06-14 at 12:23 +0200, Wolfram Greinert wrote: > acl_shared_dict: proxy::acl_dict > dict: > acl_dict: db:/var/lib/dovecot/acl_dict.db Your config looks ok, but Berkeley DB support is currently somewhat broken and might be causing your problem. Try with file backend instead: acl_shared_dict = file:/var/lib/dovecot/acl_dict