Hi, Sometimes (happens maybe twice in a day), I have the following errors: Dec 15 16:10:17 dovecot: auth(default): file auth-client-connection.c: line 33 (auth_client_send): assertion failed: (conn->refcount > 1) Dec 15 16:10:17 dovecot: child 17152 (auth) killed with signal 6 Dec 15 16:10:17 dovecot: imap-login: Can't connect to auth server at default: Connection refused Dec 15 16:10:17 dovecot: imap-login: Can't connect to auth server at default: Connection refused Dec 15 16:10:17 dovecot: imap-login: Can't connect to auth server at default: Connection refused Dec 15 16:10:17 dovecot: imap-login: Can't connect to auth server at default: Connection refused Dovecot seems to recover though, because afterwards it still works. I did however notice that the logging-in seemed to hang for a while (some seconds). Cheers David -- David Schweikert | phone: +41 44 632 7019 System manager ISG.EE | walk: ETH Zentrum, ETL F24.1 ETH Zurich, Switzerland | web: http://people.ee.ethz.ch/dws