Hi I noticed dbmail-timsieved to reaccept authentication. After reauthenticating I get an OK repsonse.
According to the ietf draft: Reauthentication is not supported by ManageSieve protocol's profile of SASL. I.e. after a successfully completed AUTHENTICATE command, no more AUTHENTICATE commands may be issued in the same session. After a successful AUTHENTICATE command completes, a server MUST reject any further AUTHENTICATE commands with a NO reply.