I probably get about 40 junk mails a day and all come through Thunderbird. It only catches about half of them and sends them to the Junk folder. I have nothing to base my opinion on but it seems to be a slow learner letting through many of the pharmacy emails. Under Junk Mail Controls I have checked boxes for White Lists and all three boxes under Handling and Logging is turned on. Is there anything else I can do or do I just have to be patient?