diff --git a/pleskdistup/actions/systemd.py b/pleskdistup/actions/systemd.py
index 4f07f2f..5c12332 100644
--- a/pleskdistup/actions/systemd.py
+++ b/pleskdistup/actions/systemd.py
@@ -113,7 +113,7 @@ def __init__(self):
         # so we should choose the right smtp service, otherwise they will conflict
         if systemd.is_service_exists("qmail.service"):
             self.plesk_systemd_services.append("qmail.service")
-        else:
+        elif systemd.is_service_exists("postfix.service"):
             self.plesk_systemd_services.append("postfix.service")
 
     def _prepare_action(self) -> action.ActionResult: