diff --git a/etc/postfix/main.cf b/etc/postfix/main.cf
index 4873b5d..962f368 100644
--- a/etc/postfix/main.cf
+++ b/etc/postfix/main.cf
@@ -74,7 +74,7 @@ smtpd_helo_restrictions = check_helo_access hash:/etc/postfix/helo_checks
 # anti-spam settings
 smtpd_milters = inet:127.0.0.1:11332
 non_smtpd_milters = inet:127.0.0.1:11332
-milter_default_action = accept
+milter_default_action = tempfail
 milter_protocol = 6
 header_checks = regexp:/etc/postfix/header_checks
 body_checks = regexp:/etc/postfix/body_checks
@@ -84,5 +84,7 @@ smtpd_delay_reject = yes
 smtpd_helo_required = yes
 strict_rfc821_envelopes = yes
 default_destination_concurrency_limit = 2
-smtpd_recipient_limit = 10
+smtpd_recipient_limit = 5
 smtp_pix_workarounds = delay_dotcrlf
+smtpd_forbid_bare_newline = yes
+smtpd_forbid_unauth_pipelining = yes