diff --git a/backup_imap/backup_imap.py b/backup_imap/backup_imap.py
index 529f745..328dab8 100644
--- a/backup_imap/backup_imap.py
+++ b/backup_imap/backup_imap.py
@@ -63,6 +63,10 @@ class BackupImap:
     def _process_mailbox(self, mailbox):
         self._log.debug("Searching for all mailboxes in mailbox '%s'...", mailbox)
         list_response, list_data = self.imap.list(f"\"{mailbox}\"", '*')
+        self._log.debug(
+            "Mailboxes: %s",
+            list_data
+        )
         if list_response == 'OK':
             for subdir in list_data:
                 if subdir: