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SPAM-Buster is a Java application for filtering SPAM based on statistical algorithms (currently Bayesian). The platform independant application can be used as graphical end-user client and additional service for mail server.
This project uses ICQ-style logic against a POP3 mailbox. Any incoming mail is checked against known users. Any not found can be either a) sent a "request authorization" form, b) ignored, or c) deleted.
Mail Receipt is a collection of utilities used to seed, receive, and summarize email receipts to be sent by HTML enabled mail readers without the mail recipeient's knowledge.