Split filter_attachment_filename_exclude by comma

src/paperless_mail/mail.py

@@ -646,6 +646,18 @@ class MailAccountHandler(LoggingMixin):
 
         return processed_elements
 
+    def _matchFilenameExlusion(filter_attachment_filename_exclude, filename) -> bool:
+        if filter_attachment_filename_exclude:
+            filter_attachment_filename_exclusions = filter_attachment_filename_exclude.split(",")
+        
+            # Force the filename and pattern to the lowercase
+            # as this is system dependent otherwise
+            filename = filename.lower()
+            for filename_exclude in filter_attachment_filename_exclusions:
+                if filename_exclude and fnmatch(filename, filename_exclude.lower()):
+                    return True
+        return False
+
     def _process_attachments(
         self,
         message: MailMessage,
@@ -682,12 +694,9 @@ class MailAccountHandler(LoggingMixin):
                     f"does not match pattern {rule.filter_attachment_filename_include}",
                 )
                 continue
-            elif rule.filter_attachment_filename_exclude and fnmatch(
+            elif self._matchFilenameExlusion(
-                att.filename.lower(),
+                rule.filter_attachment_filename_exclude, att.filename
-                rule.filter_attachment_filename_exclude.lower(),
             ):
-                # Force the filename and pattern to the lowercase
-                # as this is system dependent otherwise
                 self.log.debug(
                     f"Rule {rule}: "
                     f"Skipping attachment {att.filename} "