diff --git a/install_postfix_base.sh b/install_postfix_base.sh
index f329c9a..4d39862 100755
--- a/install_postfix_base.sh
+++ b/install_postfix_base.sh
@@ -649,11 +649,13 @@ inet_protocols = ipv4, ipv6
 
 #inet_interfaces = all
 
-inet_interfaces =
-   127.0.0.1
-   ::1
-   #$IPV4
-   #$IPV6
+inet_interfaces = loopback-only
+
+#inet_interfaces =
+#   127.0.0.1
+#   ::1
+#   #$IPV4
+#   #$IPV6
 
 myhostname = $HOSTNAME
 
@@ -686,6 +688,7 @@ else
 inet_protocols = ipv4
 
 #inet_interfaces = all
+
 inet_interfaces =
    127.0.0.1
    #$IPV4