diff --git a/imbox/imbox.py b/imbox/imbox.py
index 89fa616..f7b9de0 100644
--- a/imbox/imbox.py
+++ b/imbox/imbox.py
@@ -62,6 +62,7 @@ class Imbox:
 
     def delete(self, uid):
         logger.info("Mark UID {} with \\Deleted FLAG and expunge.".format(int(uid)))
+        self.connection.uid('STORE', uid, '+FLAGS', '(\\Deleted)')
         self.connection.expunge()
 
     def copy(self, uid, destination_folder):