diff --git a/roles/shell/files/etc/postfix/main.cf b/roles/shell/files/etc/postfix/main.cf
index b1cd962..bd4ae18 100644
--- a/roles/shell/files/etc/postfix/main.cf
+++ b/roles/shell/files/etc/postfix/main.cf
@@ -83,7 +83,6 @@ smtpd_recipient_restrictions =
 
 policyd-spf_time_limit = 3600
 
-milter_protocol = 2
 milter_default_action = accept
 milter_protocol = 6
 smtpd_milters = local:opendkim/opendkim.sock