pwcheck_method: saslauthd
mech_list: plain login
allow_plaintext: true
auxprop_plugin: mysql
sql_hostnames: {mysql_server_ip}
sql_user: {mysql_server_ispconfig_user}
sql_passwd: {mysql_server_ispconfig_password}
sql_database: {mysql_server_database}
sql_select: select password from mail_user where login = '%u'