Did you train the spam filter with the minimum number of e-mails that is required to activate your personal bayes classifier? Once your personal database has s

Did you train the spam filter with the minimum number of e-mails that is required to activate your personal bayes classifier? Once your personal database has seen more than 200 spam and 200 non-spam emails, we automatically start using it to classify your incoming mail. Because it's been trained by the exact type of messages you receive, it is normally significantly more accurate at classifying spam than our general database. However, it can only do so once it's been properly trained, which is why we have to wait until it has seen 200 of each type of message before it is activated. Source: https://www.fastmail.fm/help/receive/stopspam.html https://www.fastmail.fm/help/receive/stopspam.html