This document provides instructions for sending and receiving emails with attachments using Yahoo Mail. It explains how to compose an email and attach files, as well as how to view emails that contain attachments and download attached files to your local computer. The steps include composing an email, clicking "Attach Files" to browse for files to attach, waiting for attachments to upload, and clicking "Send". For receiving emails with attachments, it describes how to identify them by the paperclip icon, view attachable files displayed in the email, download other file types by clicking the file name and choosing "Download File", and then opening or saving the downloaded file.