A spam defining system defines rules about emails depending on user's reactions to emails. A user can delete an email as spam, or not spam, or without committing to whether the email is spam or not. If the user indicates whether the email is spam or not spam; characteristics of the email are used to...http://www.google.com.tw/patents/US7707252?utm_source=gb-gplus-share專利 US7707252 - Automatic mail rejection feature
