Freshmeat page: http://freshmeat.net/projects/spamtrainer/
Train your spam filter via drag-n-drop in GNOME.
Spam Trainer makes it easier for GNOME users to train spam filtering software (e.g. Spambayes or SpamAssassin) that "learns" how to tell the difference between real email (ham) and unsolicited messages (spam). Not all email clients have spam filtering (and training) built in, and training external filtering programs can be fiddly. Spam Trainer was written to provide easy (drag and drop) training from the Evolution mail client, and should work just as well with any email client that supports the drag and drop protocol implemented by the GTK+ toolkit.
Spam Trainer is implemented in C# and requires Mono and GTK#.
This project has the following developers:
New HTML Parser: The long-awaited libxml2 based HTML parser code is live. It needs further work but already handles most markup better than the original parser.
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If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!