Yahoo's online mail service is free and accessible wherever you have Internet access. The online mail service lets you check your email to receive updates and send messages. Once you're online, as long as you know your Yahoo ID and your account password, you can check messages and keep your inbox from overflowing.
Enter your Yahoo account password in the second box. Remember that passwords are case-sensitive. If you click the "Keep Me Signed In" box, you do not need to enter your password the next time you come to check your email. Only do this, however, if you're using a personal computer. Do not select this option if you share the computer.