diff --git a/imap_filter/imap_filter.py b/imap_filter/imap_filter.py
index f7e9776..22349ff 100644
--- a/imap_filter/imap_filter.py
+++ b/imap_filter/imap_filter.py
@@ -194,9 +194,21 @@ class ImapFilter:
             else:
                 field = 'From'
             if 'regexp' in mfilter:
+                self._log.debug(
+                    "Filter look for %s regular expressions",
+                    len(mfilter['regexp'])
+                )
                 condition = f'allof (header :contains "{field}" "{mfilter['regexp']}")'
             else:
+                self._log.debug(
+                    "Filter look for %s words",
+                    len(mfilter['words'])
+                )
                 condition = f'allof (header :contains "{field}" ["{'", "'.join(mfilter['words'])}"])'
+            self._log.debug(
+                "Condition: '%s'",
+                condition
+            )
             search = f"^.*  # imap_filter: rule name 'imap_filter_INBOX_{mfilter['name']}'$"
             replacement = f'if {condition} {{ fileinto "{mfilter['destination']}"; stop;}}  # imap_filter: rule name \'imap_filter_INBOX_{mfilter['name']}\''
             match = re.search(search, content, re.MULTILINE)