diff --git a/install/tpl/master_cf_amavis10025.master b/install/tpl/master_cf_amavis10025.master
index fb0481b39052dc00e9389d3586eb9bb943a24a30..43f362d5c0f43b8c39f95db09ede9ac90c840fd9 100644
--- a/install/tpl/master_cf_amavis10025.master
+++ b/install/tpl/master_cf_amavis10025.master
@@ -12,4 +12,5 @@
         -o strict_rfc821_envelopes=yes
         -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks
         -o smtp_send_xforward_command=yes
+        -o disable_dns_lookups=yes
 
diff --git a/install/tpl/master_cf_amavis10027.master b/install/tpl/master_cf_amavis10027.master
index 44126e2c20c9682824d57bd881ad6de71c8646ae..f9fdf1cf6045faca63eab27d6f8774a689bac44a 100644
--- a/install/tpl/master_cf_amavis10027.master
+++ b/install/tpl/master_cf_amavis10027.master
@@ -14,4 +14,5 @@
         -o smtp_send_xforward_command=yes
 	    -o milter_default_action=accept
     	-o milter_macro_daemon_name=ORIGINATING
+        -o disable_dns_lookups=yes