diff --git a/smtp2qnap4slack.py b/smtp2qnap4slack.py
index 01bc811..b081364 100644
--- a/smtp2qnap4slack.py
+++ b/smtp2qnap4slack.py
@@ -88,5 +88,4 @@ if __name__ == '__main__':
     handler = CustomHandler()
     controller = MyController(handler, hostname=LHOST, port=LPORT)
     controller.start()
-    print('SMTP server is running..\n')
-    controller.stop()
+    print('SMTP server is running.\n')