Update app.py

app.py

@@ -12,7 +12,7 @@ class CustomSMTPHandler:
 # Function to start the SMTP server
 def start_smtp_server():
     handler = CustomSMTPHandler()
-    controller = Controller(handler, hostname='0.0.0.0', port=25)
+    controller = Controller(handler, hostname='0.0.0.0', port=1025)
     controller.start()
 
 if __name__ == "__main__":