diff --git a/install_postfix_advanced.sh b/install_postfix_advanced.sh
index 633baea..5e2fc06 100755
--- a/install_postfix_advanced.sh
+++ b/install_postfix_advanced.sh
@@ -1769,7 +1769,25 @@ smtpd_client_connection_rate_limit = 10
 #smtpd_client_message_rate_limit = 10
 
 
+# ---
+# Set default 'Rate Limit' values
+# ---
+
+# default_recipient_limit (default: 20000)
+#
+# The default per-transport upper limit on the number of in-memory recipients.
+# These limits take priority over the global qmgr_message_recipient_limit after
+# the message has been assigned to the respective transports.
+#
+# See also default_extra_recipient_limit and qmgr_message_recipient_minimum.
+#
 default_extra_recipient_limit = 50
+
+# duplicate_filter_limit (default: 1000)
+#
+# The maximal number of addresses remembered by the address duplicate filter
+# for aliases(5) or virtual(5) alias expansion, or for showq(8) queue displays.
+#
 duplicate_filter_limit = 50
 
 # default_destination_recipient_limit (default: 50)