What is the fine-grained topic of the following text: At the beginning it was quite simple because for my personnal use, I work with thunderbird and it includes since a long time a very good spam filter which require not so much trainning before achieving a very good filter quality and so I didn't worried much about the quality of filtering done right on the server by the SPAM filter. Only return the topic.
Using Thunderbird's spam filter for personal email management.