On Mon, 2010-08-30 at 08:18 +0100, Vaidas Jablonskis wrote: > passdb { > driver = mysql driver = sql > args = /etc/dovecot/dovecot-sql.conf.ext > } > > userdb { > driver = prefetch > } > > userdb { > driver = mysql driver = sql > args = /etc/dovecot/dovecot-sql.conf.ext > } You specify driver=mysql inside dovecot-sql.conf.ext.