If you want to delete an E-Mail, select the desired E-Mail and click on the Delete panel function. You can also delete selected E-Mails with the Del key or via the context menu.

The deleted E-Mails will be crossed out in the list view. Additionally, the E-Mails will be marked as deleted by a respective symbol.

To delete the complete content of an E-Mail folder right-click in the folder in the folder tree and select the option Empty folder. By default, E-Mails deleted like this are moved into the Custom Trash folder. You can also irretrievably delete E-Mails. Learn more about this under Permanently remove deleted E-Mails?.