Is there a way to purge the Trash folder?
The trash folder by default is emptied upon exit, the setting for which can be found in Settings > Server Settings. If you manually want to purge the trash folder, click on Trash on the left and wait for the folder to load: make sure Trash is highlighted in gray (which ensures you are purging the trash folder and not another folder by mistake. Underneath the folder list click the “folder actions” button; one of the options is “Empty”. Please note that only the trash folder can be emptied or purged.