diff --git a/install/0.9.7/rhel/dovecot/conf.d/10-auth.conf b/install/0.9.7/rhel/dovecot/conf.d/10-auth.conf
index 920737b9e..dfcc83110 100644
--- a/install/0.9.7/rhel/dovecot/conf.d/10-auth.conf
+++ b/install/0.9.7/rhel/dovecot/conf.d/10-auth.conf
@@ -1,4 +1,4 @@
 disable_plaintext_auth = no
 auth_verbose = yes
+auth_mechanisms = plain login
 !include auth-passwdfile.conf.ext
-