via mozillaZine.org, I see that An introduction to Thunderbird, part 7 (message filters) has been released. If you're considering moving to Mozilla Thunderbird for your mail (which I highly recommend) or you're new to Thunderbird and haven't explored many of its features, then this series is a must read. It's got great information, informative screen-shots and covers quite a few of Thunderbird's most important features.
Introduction to Thunderbird, part 1 (installation and configuration)
Part 2 (interface guide)
Part 3 (creating a signature)
Part 4 (attachments and address book)
Part 5 (spam filters)
Part 6 (importing email and contacts)
Part 7 (message filters)
