SpamFilter for Linux is meant to be used via the .qmail files that the qmail mail system uses to control what to do with incoming emails. This program will give you the opportunity to control which mails you want to receive and which are to be thrown away. It does this by checking if the mail is directly addressed or not, and then checking various configuration files to see what to do. The two most important files are .allow and .deny that should reside in your home directory. .allow will let the addresses defined in it through even if they are not directly addressed. .deny will deny the addresses defined in it even if they have mailed you directly. Instructions for usage can be found in the README file.