diff --git a/src/message.rs b/src/message.rs
index a1e1b0b97..85b4489a0 100644
--- a/src/message.rs
+++ b/src/message.rs
@@ -1770,6 +1770,7 @@ pub(crate) async fn rfc724_mid_exists(
             },
         )
         .await?;
+    warn!(context, "rfc_724_mid: {:?} is found: {:?}", rfc724_mid, res);
 
     Ok(res)
 }