I have Bogofilter 1.0.2 installed on FC2, and it's working ok separating the Spam from the Ham, but I'm not sure if I have the filters set up correctly in Kmail. For example. There are no X-Bogosity header additions for the Spam in the spam box, but all of the new mail in the inbox has X-Bogosity header additions. Also, bogofilter 1.0.2 works in tri-state mode, and is able to detect Spam, Ham, and Unsure, but as of now I have not been able to set up a filter to send "Unsure" mail to the unsure box. While I was initially messing with filters, one attempt sent all the mail to the inbox, and X-Bogosity headers were added to all the mail, identifying the Spam as Spam, the Ham as Ham, and there were a couple of obvious Spam mails identified as Unsure, so Bogofilters "Unsure" appears to be working ok. The filters setup is below. Filter 1. bogofilter Filter criteria: Match all of the following <any header> matches regular expr .* Filter Actions: remove header X-Bogosity remove header X-Attachments pipe through /usr/local/bin/bogofilter -pev Advanced options: If this filter matches, stop processing here. (unchecked) This filter appears to be working ok. Filter 2. bogofilter_is_spam Filter criteria: Match all of the following X-Bogosity contains Spam X-Bogosity doesn't contain Ham Filter Actions: remove header X-Bogosity remove header X-Attachments file into folder Spam Advanced options: If this filter matches, stop processing here (unchecked) This filter separates the Spam from the Ham ok, but as I've said, X-Bogosity header additions remain in the Ham that turns up in the inbox. If I try to add an Unsure line to this filter. X-Bogosity contains Unsure along with, file into folder unsure then, pressing apply just results in the Unsure line being greyed out. Any help with setting up the filter for Unsure, and verifying that the present setup is ok is greatly appreciated. Nigel.