Mail items may be deleted directly from the main window by selecting an item or items in the InBox and clicking on the “Delete” button. To toggle a single item between selected and unselected, hold the “Shift” key down as you click on it. When you click on the “Delete” button, confirmation will be requested and then all selected mail will be deleted. If you do not want confirmation when deleting mail, hold down the “Option” key when you click on the delete button.
When using folders, “deleting” mail causes mail items to be transferred to the Trash mailbox. To delete them permanently you can choose “Empty Trash” from the folder pop-up, or you can switch to the Trash mailbox and delete them individually. See the section below on “Organizing Mail with Folders” for more information on folders.