http://bc-bd.org

To change the folder Thunderbird uses for deleted items:

• go to Tools > Options > Advanced > Config Editor
• filter for mail.server
• look for the server config you want to change, e.g. mail.server.server3
• add a string to that server, e.g.: mail.server.server3.trash_folder_name
• enter the name of the folder to use
• restart thunderbird