There are two way to delete messages in SquirrelMail:
-From the main message index that displays all of your messages, put a checkmark next to the messages you wish to delete. Then click the Delete check messages button (located at the top right of the window. This will delete any messages with a checkmark next to them.
-If you are currently viewing a message (you have clicked on its subject and can see its body, click the Delete link located above the header of the message. - Updated: June 20, 2002