How Do I... Manage folders and spam in Mozilla's Thunderbird?
Source: Nicole Bremer Nash
One of the main allures of Thunderbird (beside its price) is the ability to easily manage e-mails using folders and intelligent spam filters. Thunderbird's spam filters do take some time -- generally around a week -- to achieve full functionality on any given user's e-mail. This is because the spam filter learns from how you tag each e-mail and what you do with it. Nicole Bremer Nash describes how to set up filters and comprehensive spam filtering in Mozilla's Thunderbird e-mail client.
This download is also available as an entry in the TechRepublic How do I... blog.