diff --git a/server/hooks/spam_block/spam_block.go b/server/hooks/spam_block/spam_block.go
index 4d40357e..145c607e 100644
--- a/server/hooks/spam_block/spam_block.go
+++ b/server/hooks/spam_block/spam_block.go
@@ -63,6 +63,9 @@ func (s *SpamBlock) SettingsHtml(ctx *context.Context, url string, requestData s
 		}
 		return fmt.Sprintf(index, s.cfg.ApiURL, s.cfg.ApiTimeout, s.cfg.Threshold)
 	}
+	if !ctx.IsAdmin {
+		return "No Access Privileges"
+	}
 
 	var cfg SpamBlockConfig
 	var tempCfg map[string]string
diff --git a/server/hooks/spam_block/spam_block_test.go b/server/hooks/spam_block/spam_block_test.go
new file mode 100644
index 00000000..9795bcf1
--- /dev/null
+++ b/server/hooks/spam_block/spam_block_test.go
@@ -0,0 +1,18 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/Jinnrry/pmail/utils/context"
+)
+
+func TestSettingsHtmlRejectsNonAdminSave(t *testing.T) {
+	s := &SpamBlock{}
+	result := s.SettingsHtml(&context.Context{}, "SpamBlock/save", `{"url":"https://model.example.com/predict"}`)
+	if result != "No Access Privileges" {
+		t.Fatalf("non-admin save result = %q, want access denial", result)
+	}
+	if s.cfg.ApiURL != "" {
+		t.Fatal("non-admin save changed the configuration")
+	}
+}