1. If you haven't created the folders and extra headers already, you need to follow the instructions on the Communicator Spam Filters page. Otherwise, these filters will not work.
2. Hold down the OPTION key on the keyboard and click here. A window like the one below should appear.
3. Click on Desktop.
4. Double click on the hard disk.
5. Scroll down to the "System Folder" and double click on it.
6. Double click on the Eudora folder.
7. Under "Save this document as", put a space between "Eudora" and "Filters" so that it reads "Eudora Filters".
8. Click on Save.
9. And then you should be all set.