diff --git a/dnscrypt-proxy/plugin_block_undelegated.go b/dnscrypt-proxy/plugin_block_undelegated.go
index e7481aaa..bb7838bc 100644
--- a/dnscrypt-proxy/plugin_block_undelegated.go
+++ b/dnscrypt-proxy/plugin_block_undelegated.go
@@ -122,6 +122,7 @@ var undelegatedSet = []string{
 	"grp",
 	"gw==",
 	"home",
+	"home.arpa",
 	"hub",
 	"internal",
 	"intra",
@@ -134,6 +135,7 @@ var undelegatedSet = []string{
 	"localdomain",
 	"localhost",
 	"localnet",
+	"mail",
 	"modem",
 	"mynet",
 	"myrouter",