John Delacour has long been an Applescript whiz. Eudora Scripts etc. offers a dozen scripts just for Eudora.
All these scripts are designed to be run from the Eudora Toolbar with the click of a button or the typing of an F key. To activate a script, place it in Eudora’s Scripts folder and relaunch Eudora. To attach a script to a toolbar button, command-click between two buttons and select the script in the menu when Eudora asks.