diff --git a/install/tpl/sasl_smtpd.conf.master b/install/tpl/sasl_smtpd.conf.master
index 72371270099bcd02d82de2ebf8d0424248eca438..2629641117f96a0fc0edf5232aaaf1a805d2f27c 100644
--- a/install/tpl/sasl_smtpd.conf.master
+++ b/install/tpl/sasl_smtpd.conf.master
@@ -1,6 +1,6 @@
 pwcheck_method: saslauthd
-mech_list: plain login
-allow_plaintext: true
+mech_list: PLAIN LOGIN DIGEST-MD5 CRAM-MD5 GSSAPI
+allow_plaintext: false
 auxprop_plugin: mysql
 sql_hostnames: {mysql_server_ip}
 sql_user: {mysql_server_ispconfig_user}