Quieten
diff --git a/tools/archiver.py b/tools/archiver.py
index f0e157e..5747828 100755
--- a/tools/archiver.py
+++ b/tools/archiver.py
@@ -387,7 +387,7 @@
             except Exception as err:
                 if logger:
                     # N.B. use .get just in case there is no message-id
-                    logger.warning("Could not generate MID using %s: %s. MSGID: %s", self.generator, err, msg_metadata.get('message-id', '?').strip())
+                    logger.info("Could not generate MID using %s: %s. MSGID: %s", self.generator, err, msg_metadata.get('message-id', '?').strip())
                 mid = pmid
 
             if 'in-reply-to' in msg_metadata: