Freshmeat page: http://freshmeat.net/projects/swendeleter/
SwenDeleter is a POP3 filter that lets the user identify and delete messages infected with the Swen worm remotely on the server. SwenDeleter does not download the whole email, it uses some heuristics about the headers and message size, so this operation is quite fast.
SwenDeleter can run in interactive or nonstop mode.
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!